Generation of Fock states and qubits in periodically pulsed nonlinear oscillator

TL;DR

This paper demonstrates how to generate Fock states and superpositions in a dissipative nonlinear oscillator using Gaussian pulses, highlighting practical experimental signatures for quantum state preparation.

Contribution

It introduces a method to produce Fock states and superpositions in a dissipative nonlinear oscillator through pulsed excitation, leveraging Kerr nonlinearity and energy level control.

Findings

Fock states and superpositions are achieved beyond decoherence times.

Strong Kerr nonlinearity enables quantum state control.

Specific Gaussian pulse trains facilitate state preparation.

Abstract

We demonstrate a quantum regime of dissipative nonlinear oscillator where creation of Fock states as well as superpositions of Fock states are realized for time-intervals exceeding the characteristic decoherence time. Preparation of quantum states is conditioned by strong Kerr nonlinearity as well as by excitation of resolved lower oscillatory energy levels with specific train of Gaussian pulses. This provides practical signatures to look for in experiments with cooled nonlinear oscillators.