  We investigate the generation of entanglement through a quantum dot molecule
under the influence of vibrational phonon modes in a bias voltage junction. The
molecular quantum dot system is realized by coupled quantum dots inside a
suspended carbon nanotube. We consider the dynamical entanglement as a function
of bias voltage and temperature by taking into account the electron-phonon
interaction. In order to generate the robust entanglement between quantum dots
and preserve it to reach the maximal achievable amount steadily, we introduce
an asymmetric coupling protocol and apply the easy tunable bias voltage-driven
field. For an oscillating bias voltage, the time-varying entanglement can
periodically reach the maximum revival. In thermal entanglement dynamics, the
phenomena of thermal entanglement degradation and thermal entanglement revival
are observed which are intensively affected by the strength of phonon
decoherence. The revival of entanglement shows a larger value for a higher
phonon coupling.

Mesoscale and Nanoscale Physics;Quantum Physics