Environmental noise paradoxically preserves the coherence of a quantum system

Phys.org   May 30, 2018
Normally dephasing causes decoherence in quantum systems. An international team of researchers (Japan, Germany, USA – University of Buffalo, University of Michigan) shows a scheme of entanglement engineering where pure dephasing assists the generation of quantum entanglement at distant sites in a chain of electron spins confined in semiconductor quantum dots. One party of an entangled spin pair, prepared at a single site, is transferred to the next site and then adiabatically swapped with a third spin using a transition across a multi-level avoided crossing. This process is accelerated by the noise-induced dephasing… read more. Open Access TECHNICAL ARTICLE 

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