Nonlinear coherent loss for generating non-classical states

TL;DR

This paper explores using nonlinear coherent loss to generate non-classical bosonic states, such as specific superpositions of Fock states, analyzing their purity and maximum fidelity achievable.

Contribution

It introduces a method for generating targeted non-classical states via engineered nonlinear loss, advancing control over quantum state preparation.

Findings

Superpositions of Fock states can be generated using nonlinear coherent loss.

Selective 'comb' states with specific properties are achievable.

Purity and fidelity of generated states are estimated and optimized.

Abstract

Here we discuss generation of non-classical states of bosonic mode with the help of artificially designed loss, namely the nonlinear coherent loss. We show how to generate superpositions of Fock states, and how it is possible to "comb" the initial states leaving only states with certain properties in the resulting superposition (for example, a generation of a superposition of Fock states with odd number of particles). We discuss purity of generated states and estimate maximal achievable generation fidelity.