Emergence of long distance pair coherence through incoherent local environmental coupling

TL;DR

This paper shows that incoherent environmental coupling can induce long-range quantum pair coherence in fermionic systems, offering a new way to control many-body quantum correlations.

Contribution

It introduces a novel mechanism where incoherent environmental noise and kinetic processes generate long-distance pair coherence in fermionic systems.

Findings

Long-distance pair coherence is generated via incoherent environmental coupling.

Coherence extends over large distances similar to Bose-Einstein condensates.

The approach offers new control over quantum many-body correlations.

Abstract

We demonstrate that quantum coherence can be generated by the interplay of coupling to an incoherent environment and kinetic processes. This joint effect even occurs in a repulsively interacting fermionic system initially prepared in an incoherent Mott insulating state. In this case, coupling a dissipative noise field to the local spin density produces coherent pairs of fermions. The generated pair coherence extends over long distances as typically seen in Bose-Einstein condensates. This conceptually surprising approach provides a novel path towards a better control of quantum many-body correlations.