Quantum bits and superposition displaced Fock states of the cavity field

TL;DR

This paper investigates how counter-rotating terms affect the interaction between quantized light and a two-level atom, providing a wave function expression and a method to generate quantum bits of the electromagnetic field.

Contribution

It introduces a new analytical approach to account for counter-rotating terms and demonstrates how to generate quantum bits with arbitrary amplitudes in the electromagnetic field.

Findings

Derived an explicit wave function for the atom-field system.

Identified initial states that produce quantum bits with arbitrary amplitudes.

Analyzed the impact of counter-rotating terms on quantum state generation.

Abstract

We study the effects of counter rotating terms in the interaction of quantized light with a two-level atom, by using the method of small rotations. We give an expression for the wave function of the composed system atom plus field and point out one initial wave function that generates a quantum bit of the electromagnetic field with arbitrary amplitudes.