32nd M. Smoluchowski Symposium on Statistical Physics
Europe/Warsaw timezone
Smoluchowski Symposium
smoluchowski@uj.edu.pl
43. Introduction to the quantum first detection problem
Prof. Eli Barkai (Bar-Ilan University)
We consider quantum dynamics on a graph, with repeated strong measurements performed locally at a fixed time interval $\tau$. For example a particle starting on node $x$ and measurements performed on another node $x'$. From the basic postulates of quantum mechanics the string of measurements yields a sequence no,no,no, $\cdots$ and finally in the $n$-th attempt a yes, i.e. the particle is...
44. Stochastic Resetting
Satya Majumdar (CNRS, LPTMS, Universite Paris-Sud (Orsay), France)
Evolving stochastic process, when interrupted at random epochs and reset to its initial condition, reaches a new nonequilibrium stationary state. The approach to the stationary state is accompanied by an unusual `dynamical phase transition'. Moreever, the mean first-passage time to a fixed target becomes a minimum at an optimal value of the resetting rate. This makes the diffusive search...
48. Active Interface Equations
Prof. Martin Evans (University of Edinburgh)
In this work we consider the role of active inclusions in a growing interface, for example membrane binding proteins which catalyse growth in the plasma membrane of eukaryotic cells. The interface is thus rendered active and is described by two coupled fields: the height field of the interface and the density of the inclusions. The equations generalise to active interface growth the Kardar...
60. Fluctuation Theorems for Systems without Stationary PDF: KPZ case
Horacio S. Wio (Institute for Cross-Disciplinary Physics and Complex Systems)
We analyze a couple of simple systems, without stationary probability distribution, in order to show how to proceed for obtaining detailed as well as integral fluctuation theorems in such a kind of systems. To reach such a goal, we exploit a path integral approach that adequately fits to this kind of study. This methodology, together with the variational approach, are also exploited to...
4. Competition between cancer and immune system cells in an inhomogeneous system: A thermostatted kinetic theory approach
Dr Annie Lemarchand (Sorbonne Université, CNRS)
The treatment of cancer by boosting the immune system is a recent and promising therapeutic strategy. During interactions, the immune system cells learn to recognize cancer cells. Analogously, the cancer cells can develop the ability to blend into the surrounding tissue and mislead the immune system cells.
I will present a model of cell interactions in the framework of thermostatted kinetic...
6. Single particle diffusion in periodic potentials
Oded Farago (Ben Gurion University)
We calculate the time-dependent probability distribution function (PDF) of an overdamped Brownian particle moving in a one-dimensional periodic potential energy $U(x)$. The PDF is found by solving the corresponding Smoluchowski diffusion equation. We derive the solution for any periodic even function $U(x)$ and demonstrate that it is asymptotically (at large times $t$) correct up to terms...
9. Of Brains and Markets
Reimer Kuehn (Department of Mathematics, King's College London)
In this talk, we explore an approach to understanding price fluctuations within a market via considerations of functional dependencies between asset prices. Interestingly, this approach suggests a class of models of a type used earlier to describe the dynamics of real and artificial neural networks. Statistical physics approaches turn out to be suitable for an analysis of their collective...
50. Mimicking heterogeneous diffusion with time dependent random diffusivity.
Ms Vittoria Sposini (University of Potsdam (Germany) & BCAM (Spain))
A considerable number of systems have recently been reported in which Brownian yet non-Gaussian dynamics was observed. These are processes characterised by a linear growth in time of the mean squared displacement, yet the probability density function of the particle displacement is distinctly non-Gaussian, and often of exponential (Laplace) shape. This behaviour has been interpreted as...
15. Thermodynamic Efficiency in Dissipative Chemistry
Emanuele Penocchio (University of Luxembourg)
Chemical processes in closed systems inevitably relax to equilibrium. Living systems avoid this fate and give rise to a much richer diversity of phenomena by operating under nonequilibrium conditions. Recent experiments in dissipative self-assembly also demonstrated that by opening reaction vessels and steering certain concentrations, an ocean of opportunities for artificial synthesis and...
5. Cross-diffusion in concentrated reactive systems revealed by perturbation of FKPP wave front
Mr Gabriel Morgado (Institute of Physical Chemistry - PAN / Sorbonne Universite)
The sensitivity to perturbations of the Fisher, Kolmogorov, Petrovskii, and Piskunov (FKPP) wave front is used to find a quantity revealing the perturbation of diffusion in a concentrated solution. We consider two chemical species A and B engaged in the reaction A + B $\rightarrow$ 2A. When A and B have different diffusivities $D_A$ and $D_B$, the deterministic dynamics includes...
55. Exact resuts on Quantum Walks
Kirone MALLICK (IPhT, CEASaclay France)
Quantum analogs of classical random walks have been defined in quantum information theory as a useful concept to implement algorithms. Due to interference effects, statistical properties of quantum walks can drastically differ from their classical counterparts, leading to much faster computations.
We shall present various statistical properties of continuous-time quantum walks on a ...
49. Non-Hermitean and Zeno limit of the quantum first detection problem
Dr Felix Thiel (Bar-Ilan University)
The classical first-passage theory for random walks is generalized to quantum systems by using repeated attempts with a fixed frequency $1/\tau$ to find the system in the detection state $| \psi_\text{d}\rangle$. The first successful of these attempts defines the time $T = N \tau$ of first detected arrival. Here, the Zeno limit $\tau\to0$ of diverging detection frequency is investigated. The...
10. Fundamental limitations of the step quantum heat engine
Dr Marcin Łobejko (University of Gdańsk)
The model of a step quantum heat engine (SQHE) is defined as a working body, given by the two-level system (TLS), acting separately (i.e. in steps) with the heat baths and the energy storage system (a battery). A single step of the engine is defined as the unitary and energy conserving operation. For the general SQHE we prove the fundamental attainable efficiency, given as a function of a cold...
64. How is information decoded in developmental systems?
Marcin Zagórski (Marian Smoluchowski Institute of Physics, Jagiellonian University)
The development of multicellular organisms is a dynamic process in which cells divide, rearrange, and interpret molecular signals to adopt specific cell fates. Despite the intrinsic stochasticity of cellular events, the cells identify their position within the tissue with striking precision of one cell diameter in fruit fly or three cell diameters in vertebrate spinal cord. How do cells...
2. Lévy flights in steep potential wells: Langevin modeling versus direct reponse to energy landscapes
Prof. Piotr Garbaczewski (University of Opole)
The Eliazar-Klafter targeted stochasticity concept , together and that of the reverse engineering (reconstruction of the stochastic process once a target pdf is a priori given), has been originally devised for Lévy-driven Langevin systems. Its generalization, discussed in [PRE 84, 011142, (2011)], involves a non-Langevin alternative which associates with the sam Levy driver and the same...
19. Levy walk with rests: Escape from bounded domain
Dr Agnieszka Kamińska
The Levy walk processes with rests restricted to a region bounded by two absorbing barriers are discussed. The waiting time between the jumps is given by an exponential distribution with a constant jumping rate and with a position-dependent jumping rate. The time of flight for both ranges of $\alpha$: lower $(0,1)$ and higher $(1,2)$, is considered.
For constant jumping rate two limits are...
36. The Volterra type equation related to the non-Debye relaxation
Dr Katarzyna Górska (INP PAS)
I will present the solutions of Volterra equations with the fading memory given by the Prabhakar function with negative upper parameter which is relevant to the standard non-Debye models of dielectric relaxation, namely for the Cole-Cole, Cole-Davidson, and Havriliak-Negami models. These integro-differential equations are solved by using the umbral calculus and Laplace transform method whose...
3. Maxwell demons in phase space
Prof. Juan MR Parrondo
Although there is not a complete "proof" of the second law of thermodynamics based on microscopic dynamics, two properties of Hamiltonian systems have been used to prove the impossibility of work extraction from a single thermal reservoir: Liouville's theorem and the adiabatic invariance of the volume enclosed by an energy shell (Helmholtz's theorem). In this talk, I will review these two...
18. Entropy Production in Open Systems: The Predominant Role of Intra-Environment Correlations
Mr Krzysztof Ptaszyński (Institute of Molecular Physics, Polish Academy of Sciences)
We show that the entropy production in small open systems coupled to environments made of extended baths is predominantly caused by the displacement of the environment from equilibrium rather than, as often assumed, the mutual information between the system and the environment. The latter contribution is strongly bounded from above by the Araki-Lieb inequality, and therefore is not...
31. Dynamical mean field theory of neural networks with power-law disorder
Lukasz Kusmierz (RIKEN Center for Brain Science)
Transitions to chaos have been previously extensively studied in different setups of randomly connected networks. The prevailing assumption is that, due to the central limit theorem, synaptic input can be modeled as a Gaussian random variable. In this scenario, a continuous transition has been found in rate models with smooth activation functions. However, these models do not take into account...
57. $q$-Neighbor Majority-Vote Model on Complex Networks
Andrzej Krawiecki (Faculty of Physics, Warsaw University of Technology)
A $q$-neighbor majority-vote model for the opinion formation is introduced in which agents
represented by two-state spins update their opinions on the basis of the opinions of
randomly chosen subsets of $q$ their neighbors ($q$-lobbies). The agents with probability
$(1-2p)$, $0\le p\le1/2$, obey the majority-vote
rule in which the probability of the opinion flip depends only on the sign of...
52. Problems in creating adequate stochastic model of memristors
Prof. Alexander Dubkov (Lobachevsky State University)
Currently, the investigations of resistive switching have attracted much attention. Electronic devices, the functioning of which is based on the resistive switching, are called memristors. The memristor as a new fundamental element of the electrical circuit that dissipates energy and has memory was theoretically predicted by Chua in 1971, but found its hardware implementation only in 2008. It...
56. Machine learning methods in estimates of heart rate variability
Danuta Makowiec (Institute of Theoretical Physics and Astrophysics, University of Gdansk)
Enormous progress in machine learning achievements, going together with their excellent implementations on user-friendly platforms, have pushed many of us towards this
methodology. Can we get better explanations for studied data? Can we get the explanation easier? In the following we deal with data formed from recordings on healthy people with different age and sex. The problem is how the age...
7. Classification of diffusion modes in single particle tracking data: feature based vs. deep learning approach
Dr Janusz Janusz Szwabiński (Wrocław University of Science and Technology)
Single-particle trajectories measured in microscopy experiments contain important information about dynamic processes undergoing in a range of materials including living cells and tissues. However, extracting that information is not a trivial task due to the stochastic nature of particles' movement and the sampling noise. It usually starts with the detection of a corresponding motion type of a...
63. A particle's transport and absorption modelling in a system consisting of two media separated by a thin membrane
Katarzyna Lewandowska (Medical University of Gdansk)
We study a system which consists of two media divided by a thin partially permeable membrane. One of these media is diffusive. The second one is subdiffusive. Moreover, transported particles can be absorbed in the subdiffusive medium. In order to find methematical description of a transport process we use a new, universal model that is presented in details in \textit{T. Koszto\l{}owicz, Phys....
21. Clustering of dynamic node states in an adaptive network model
Johannes A. Kassel (MPI for the Physics of Complex Systems)
We investigate an adaptive network model describing human smoking behavior incorporating the social processes homophily and induction introduced by Schleussner et al. (Sci Rep 2016). Upon social transition, the smoking prevalence in the model decreases, leaving remaining smokers clustered and marginalized in the network. Intriguingly, the model qualitatively resembles empirical findings....
22. Continuous-time random walk with correlated waiting times - activity clustering description
Jarosław Klamut (University of Warsaw, Faculty of Physics)
Continuous-time random walk (CTRW) is a stochastic process with continuous and fluctuating waiting (inter-event) time. It was first introduced to physics by Montroll and Weiss. Since then it has been used in many areas of science [1]. CTRW is also successfully applied in econophysics [2], for example, it is used to describe stock price dynamics. We can consider the stock price as the price of...
68. Deterministic and randomized motions in single-well potentials
Michal Mandrysz (Krakow)
We study the Newtonian, undamped motion in single-well potentials. We investigate and compare long-time properties of fully deterministic motions in single-well potentials with analogous randomized systems. As a special special type of energy conserving randomization process we consider hard velocity reversals: $\vec{v}(t_i)→-\vec{v}(t_i)$ at random time instants $t_i$. On the one hand, in the...
17. Diffusion in a system with a membrane that can change the state of the particles passing through it.
Tadeusz Kosztołowicz (Institute of Physics, Jan Kochanowski University in Kielce)
Using a new method, time evolution of the probability distribution of the number of particle passes through a thin membrane will be derived. As far as we know, a distribution of the number of particle's passes between selected points of the system (membrane surfaces) have not been determined yet.
We assume that a passage of a particle through the membrane may cause a change in particle's state...
54. Discliantion formation in two-dimensional dense systems of hard and soft disks
Dr Agnieszka Chrzanowska (Instytut Fizyki PK)
Hard objects can behave differently from the objects/particles that are interacting through soft potential. The main difference is that soft interacting particles can store potential energy accomodating at the same time their positions. Hard interacting particles possess no potential energy and their arrangement is fully according to the entropic and geometry conditions. The excluded volume...
13. Dynamical properties of confined hard-sphere glasses
Dr Gerhard Jung (University of Innsbruck)
The structural relaxation of dense liquids displays a drastic slowing down upon compression or cooling, a phenomenon which is commonly identified with the glass transition. Many dynamical properties of the glass transition in bulk liquids have been successfully described by mode-coupling theory (MCT [1]). Even more involved is the description of confined liquids since they already exhibit...
53. Effective Medium Theory for an ultra thin liquid crystalline films and its consequences for the ellipsometric modeling -
Dr Agnieszka Chrzanowska ( Instytut Fizyki PK)
Technological applications of liquid crystals (LC) have been for many decades a continous driving force for investigating properties of this fascinating state of matter by theorists as well as by experimentalists. Still many questions about LC properties need to be answered. Special attention is paid to the optical characteristics of liquid crystalline thin films. In the current...
42. Energy landscape in polymer translocation
Alessandro Fiasconaro (Univesidad de Zaragoza)
The passage of long biochemical structures through nano-channels from one side to the other side of a membrane is a normal process in biology. Drug absorption, protein and DNA/RNA passage through cell membranes and nuclear pores, DNA packaging by phage viruses are a few known examples.
After Kasianowick work on 1996, both theoretical and experimental investigations have been developed to...
38. Evolutionary paths in affinity maturation
Mr Natanael Spisak (ENS, CNRS)
The humoral response to an infection relies on the process of affinity maturation. In order to develop antibodies with good binding properties, B cells gather in germinal centers where they proliferate and acquire mutations. The best mutants are selected to further proliferate. This evolutionary process is fueled by somatic hypermutations (SHM) which occur at a very high frequency. We propose...
28. Generation of prototype membranes with prescribed structure and diffusion properties comparable to real hybrid polymer membranes
Michal Ciesla (M. Smoluchowski Institute of Physics, Jagiellonian University, Kraków, Poland)
This work aims to create prototype structures of hybrid polymeric membranes with the desired quantity, size and distribution of obstacles, which corresponds to the given amount of magnetite in the hybrid alginate membrane. The membrane is represented by a black and white image where the black regions corresponds to polymer matrix and are available for diffusive particles and the white ones are...
32. Influence of molecular conformations on formation of nematic phases on a surface
Paweł Karbowniczek (Institute of Physics, Cracow University of Technology)
Bent-shaped particles gain more and more interest nowadays
due to the formation of novel liquid crystalline structures. Here, we investigate impact of molecular shape and conformational degrees of freedom on stabilization of nematic phases in two dimensional systems. Analyzed particles are composed of two and three arms built of either hard disks or hard needles. Additionally, they have...
41. Information processing in biological molecular machines
Dr Chelminiak Przemyslaw (Adam Mickiewicz University)
Biological molecular machines are enzymes that simultaneously catalyze
two processes, one donating free energy and second accepting it. Recent
studies show that most native protein enzymes have a rich stochastic dynamics
that often manifests in fluctuating rates of the calatyzed processes and
the presence of short-term memory resulting from transient non-ergodicity.
For such dynamics, we prove...
59. Kinetic equation for the pair distribution function \\ in the Boltzmanns gas
Dr Ryszard Wojnar (Instytut Podstawowych Problemów Techniki PAN)
We report on a new kinetic equation for an auxiliary two-particle distribution function
$f({\bf k_1}, {\bf v_1}, {\bf k_2}, {\bf v_2}, t)$.
Its general form reads
\begin{array}{l}
\displaystyle
\left(\frac{\partial}{\partial t} \, + \, {\rm i} \, {\bf k_1} {v_1} \, + \, {\rm i} \ {\bf k_2} {v_2} \right)
f({\bf k_1}, {\bf v_1}, {\bf k_2}, {\bf v_2}, t) \, = ...
8. Light-driven resonance of concentration oscillations in fluorescent proteins
Ms Agnes Pellissier-Tanon (Sorbonne University)
Selective imaging is a challenge in Biology. Out-of-Phase Imaging after Optical Modulation (OPIOM) [1] exploits reversibly photoswitchable fluorophores to selectively detect a target species in the presence of spectrally interfering fluorescent species. The method combines optimized periodic illumination and phase-sensitive detection, which matches the dynamics of the targeted photoreactive...
67. Modeling of living cell's mechanical properties
Agnieszka Kurek (Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences)
Cell's mechanical and physical properties such as elasticity or adhesion are significant parameters determining cell behaviour [1].
Changes in mechanical properties of cells can be connected with diseases such as cancer or blood diseases. Quantification of mechanical properties, analysis and comparison of collected data, can allow understanding the mechanism of disease formation and...
65. Molecular arrest in binary mixtures induced by spatially correlated stochastic dynamics
Dr Maciej Majka (Jagiellonian University)
Binary mixtures, i.e. the systems composed of two different species of particles, exhibit a huge variety of dynamical modes and phase transitions. This includes demixing effects and several combinations of mobility and arrest, e.g. the collective critical slow-down of the bigger particles mediated by the presence of the smaller molecules. It was recently realized that the interactions in such...
47. Multi-branchness and the phase transitions in time series of inter-event times
We develop an extended multifractal analysis based on the Legendre-Fenchel transform (some- times referred to as Legendre multi-branched one) rather than the routinely used canonical Legendre transform. In our variant of coarse-graining pre-processing, the local detrending of time series has been replaced by an appropriate averaging over days combined with properly-suited detrending on a daily...
46. Multimodal stationary states in symmetric single-well potentials driven by Cauchy noise
Mr Karol Capała (Marian Smoluchowski Institute of Physics, UJ)
Stationary states for a particle moving in a single-well, steeper than parabolic, potential driven by Lévy noise can be bimodal. We explore in details conditions required to induce multimodal stationary states with a modality higher than two and provide phenomenological arguments determining necessary conditions for emergence of stationary states with an anticipated multimodality. The poster...
14. Negative differential response in chemical reactions
Reaction currents in chemical networks can decrease when increasing their driving affinities. Such negative differential response (NDR), a hallmark of nonequilibrium physics, is found in reaction schemes of major biological relevance, namely, substrate inhibition and autocatalysis. We display it by deriving the full counting statistics of two minimal representative models by large deviation...
58. Non-diffusive Fluxes in Brownian System with Lorentz Force
Mr Iman Abdoli (Leibniz institute for Polymer Research)
The Fokker-Planck equation provides complete statistical description of a particle undergoing random motion in a solvent. In the presence of Lorentz force due to an external magnetic field, the Fokker-Planck equation picks up a tensorial coefficient, which reflects the anisotropy of the particle motion. This tensor, however, can not be interpreted as a diffusion tensor; there are antisymmetric...
33. Non-equilibrium thermodynamics and coarse-grained models of polymers.
Dr Piotr Weber (Gdańsk University of Technology)
Polymers are a group of molecules that presents various physicochemical properties. Some of these properties result from specific chemical groups in the polymer. Another properties are universal, they result from the fact of the chain structure of the molecule. To describe these universal properties of polymers, there are coarse-grained models, which represents this molecule as a chain. Such...
29. Option pricing under the Generalized Geometric Brownian Motion
Mr Viktor Stojkoski (Macedonian Academy of Sciences and Arts)
Classical option pricing schemes assume that the value of a financial asset follows a geometric Brownian motion (GBM). However, a growing body of studies suggest that a simple GBM trajectory is not an adequate representation for the dynamics of an asset due to the fat-tailed properties found in empirical distributions of the asset returns. To capture this phenomenon three approaches have been...
20. Quantum boomerang effect in disordered interacting systems
Jakub Janarek (Jagiellonian University/Laboratoire Kastler Brossel)
Anderson localization (AL), the absence of diffusion, is one of the most famous phenomena occurring in disordered systems. Since the original Anderson's paper [1], AL was thoroughly investigated theoretically and observed in numerous experimental setups including light, classical waves and quantum systems. Presence of localization leads to many surprising phenomena. One of them is the *quantum...
26. Random sequential adsorption kinetics for several two-dimensional shapes placed on a one-dimensional line
Kozubek Konrad (M. Smoluchowski Institute of Physics, Jagiellonian University, Kraków, Poland)
Random sequential adsorption (RSA) is a protocol to generate random packing in the following way:
a virtual particle position and orientation in case of anisotropic shapes is selected randomly inside the packing;
if the virtual particle does not intersect with any object on the plane, it is added to the packing. Otherwise, it is removed from the system and abandoned.
One of is's key...
37. Role of thermal fluctuations in gene expression
Moupriya Das (Max Planck Institute for the Physics of Complex Systems)
The role of thermal fluctuations is crucial in certain important biological processes, such as, transcription, translation, replication mechanisms, as they take place in very small scale systems.
We propose paradigmatic models for the transcription, i.e., DNA to m-RNA formation and DNA replication to see the effect of the environment on these important biological processes. We consider these...
25. Searching for the shape that maximises saturated random sequential adsorption packings
Piotr Kubala (Jagiellonian University)
The problem of packing objects into limited space has an ancient history and is still of great importance from both utilitarian and fundamental point of view. Three-dimensional random packings are especially important due to their potential application in a granular matter and life sciences, while two-dimensional packings can, for example, model adsorption monolayers. These packings are...
40. Social influence with recurrent mobility and multiple options
Dr Attila Szilva (Uppsala University)
In this presentation, we discuss the possible generalizations of the social influence with recurrent mobility (SIRM) model [Phys. Rev. Lett. 112, 158701 (2014)]. Although the SIRM model worked approximately satisfying when U.S. election was modeled, it has its limits: it has been developed only for two-party systems and can lead to unphysical behavior when one of the parties has extreme vote...
66. Spectral analysis of electromyographic signals
Jacek Siódmiak (Department of Physics, Institute of Mathematics and Physics, UTP University of Science and Technology in Bydgoszcz)
This work presents the spectral analysis of electromyography. Electromyographic studies are used to aid in the management and diagnostic of myopathy and neuropathy disease. Using signal analysis techniques to determine the distribution of power into frequency components we indicate that there are significant differences between patients proven healthy, and patients with the myopathy or...
23. Surviving on the edge of instability
Artem Ryabov (Charles University)
Properties of stochastic dynamics in highly unstable potentials are strongly influenced by divergent trajectories, which quickly leave meta-stable regions and never return there. Using formalism from the theory of Q-processes and quasi-stationary distributions, we discuss distributions of non-diverging trajectories in highly unstable potentials. We focus on two stationary distributions which...
30. The impact of shape's polyhedral symmetry breaking on packing density
When studying packings of objects one observes the depencence of packing density on various factors, the symmetry of particles included. For example, the packings of ellipsoids can be denser than the packings of spheres, which represents the general trend in a transition between two continuous symmetries. Here, our main goal was to check, whether a similar effect can be observed for shapes of...
24. Thermodynamic bootstrap program for dynamic correlation functions
Mr Miłosz Panfil (University of Warsaw)
I will address the problem of computing dynamic correlation functions in Integrable QFT's at finite temperature and out of equilibrium. The approach is based on the form-factor expansion of the correlation functions. Thanks to the integrability, the form-factors at finite temperature can be effectively bootstrapped, through a procedure generalizing the Smirnov's bootstrap program for vacuum...
45. Time-of-flight characteristics of dispersive transport in aligned quantum wires with fractal disorder
Renat Sibatov (Ulyanovsk State University)
Dispersive transport of photo-injected carriers in arrays of vertically aligned fractal nanowires is considered. The conditions of the time-of-flight experiment are assumed. Photocurrent response after injection of non-equilibrium carriers by the short light pulse is studied. Carriers are injected instantaneously from the left side of the array, then, move along wires under the action of a...
62. Towards a conformational entropy and viscoelastic properties: molecular dynamic study on mucin example
Dr Natalia Kruszewska (UTP University of Science and Technology)
We are investigating a conformational entropy of mucin protein to discern its correlation with the viscoelastic properties of the biopolymer system in various thermodynamic conditions. The mucin is believed to be responsible for gel formation inside synovial fluid of joints system which is very sensitive on both temperature and concentration changes[1]. The conformational entropy is computed...
39. Twist-bend nematic phase in the presence of molecular chirality
Mr Wojciech Tomczyk (M. Smoluchowski Institute of Physics (Jagiellonian University))
Twist-bend nematic $\left(N_\text{TB}\right)$ [1, 2] is a fifth member of the nematic family, beyond uniaxial $\left(N_\text{U}\right)$ and biaxial $\left(N_\text{B}\right)$ nematics, cholesteric $\left(N^{\ast}\right)$ and blue phases $\left(\text{BP}\right)$. Its uniqueness arises from a double degenerate ground-state (ambidextrous chirality) with a periodically modulated heliconical...