Endurance of Quantum Coherence in Born-Markov Open Quantum Systems. (arXiv:1709.04336v1 [quant-ph])

Quantum coherence, the physical property underlying fundamental phenomena
such as multi-particle interference and entanglement, has emerged as a valuable
resource upon which exotic modern technologies are founded. In general, the
most prominent adversary of quantum coherence is noise arising from the
interaction of the associated dynamical system with its environment. Under
certain conditions, however, the existence of noise may drive quantum and
classical systems to endure intriguing nontrivial effects. Along these lines,
here we demonstrate, both theoretically and experimentally, that when two
indistinguishable particles co-propagate through quantum networks affected by
noise, the system always evolves into a steady state in which coherences
between certain separable states perpetually prevail. Furthermore, we show that
the same steady state with surviving quantum coherences is reached
irrespectively of the configuration in which the particles are prepared.

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