Reservoir engineering with localized dissipation: dynamics and pre-thermalization

Abstract

Reservoir engineering lattice states using only localized engineered dissipation is extremely attractive from a resource point of view, but can suffer from long relaxation times. Here, we study the relaxation dynamics of bosonic lattice systems locally coupled to a single squeezed reservoir. Such systems can relax into a highly non-trivial pure states with long-range entanglement. In the limit of large system size, analytic expressions for the dissipation spectrum can be found by making an analogy to scattering from a localized impurity. This allows us to study the cross-over from perturbative relaxation to a slow, quantum-Zeno regime. We also find the possibility of regimes of accelerated relaxation due to a surprising impedance matching phenomena. We also study intermediate time behaviors, identifying a long-lived "prethermalized" state associated that exists within a light cone like area. This intermediate state can be quasi-stationary, and can very different entanglement properties from the ultimate dissipative steady state.

14 pages, 6 figures

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• Exact dynamical correlations of nonlocal operators in quadratic open Fermion systems: a characteristic function approach
• Dissipative stabilization of entangled qubit pairs in quantum arrays with a single localized dissipative channel
• Quantum wires with local particle loss: Transport manifestations of fluctuation-induced effects
• Macroscopic distant magnon-mode entanglement via a squeezed drive
• An algorithm for tailoring a quadratic lattice with a local squeezed reservoir to stabilize generic chiral states with non-local entanglement
• Shape effects of localized losses in quantum wires: dissipative resonances and nonequilibrium universality
• Reservoir-assisted energy migration through multiple spin-domains