Nonlinear dissipation can combat linear loss

TL;DR

This paper shows that engineered nonlinear dissipation can effectively counteract strong linear loss, enabling the generation of non-classical states and maintaining non-classicality even with high linear loss through appropriate driving.

Contribution

It introduces a method to construct loss-resistant dissipative gadgets that produce non-classical states despite strong linear loss, expanding the possibilities for quantum state engineering.

Findings

Nonlinear dissipation can compensate for linear loss in quantum systems.

Desired non-classical states can be achieved with arbitrary precision within specific time intervals.

Strong linear loss can be mitigated by coherent or thermal driving to produce non-classical stationary states.

Abstract

We demonstrate that it is possible to compensate for effects of strong linear loss when generating non-classical states by engineered nonlinear dissipation. We show that it is always possible to construct such a loss-resistant dissipative gadget in which, for a certain class of initial states, the desired non-classical pure state can be attained within a particular time interval with an arbitrary precision. Further we demonstrate that an arbitrarily large linear loss can still be compensated by a sufficiently strong coherent or even thermal driving, thus attaining a strongly non-classical (in particular, sub-Poissonian) stationary mixed states.