A theoretical analysis of recent experiments suggests that a key
feature of a topological quantum computer—the unusual statistics
of quasiparticles in the quantum Hall effect—may finally have
been observed. Phys. Rev. Focus24, 7 (2009) – Published August
17, 2009 Real-world events always proceed in the direction of
increasing entropy, even though the laws of physics don’t
require it. The reason we never see events that reduce entropy
is that they cannot leave behind any evidence of having
happened, according to a new theory. This design of atomic
quantum memory tells us when a pulse of light has been
successfully stored and then proceeds to retrieve it without
significantly affecting its polarization. The exquisite
operation provides a new capability for quantum information
networks. A proposal for obtaining optical resolution better
than the classical limit by means of spatially entangled quantum
states of light opens a new frontier in the fields of quantum
optical imaging, metrology, and sensing. Coherent o