Schrodinger cat states prepared by Bloch oscillation in a spin-dependent optical lattice

TL;DR

This paper proposes a method to generate Schrödinger cat states using Bloch oscillations of ultra-cold atoms in a spin-dependent optical lattice, exploiting state-dependent energy band structures to create macroscopic superpositions.

Contribution

It introduces a novel approach to prepare Schrödinger cat states by leveraging spin-dependent Bloch oscillations in optical lattices, connecting atomic internal states with macroscopic quantum superpositions.

Findings

Successful theoretical proposal for cat state preparation

Utilizes spin-dependent potentials for state control

Potential applications in quantum information processing

Abstract

We propose to use Bloch oscillation of ultra-cold atoms in a spin-dependent optical lattice to prepare schrodinger cat states. Depending on its internal state, an atom feels different periodic potentials and thus has different energy band structures for its center-of-mass motion. Consequently, under the same gravity force, the wave packets associated with different internal states perform Bloch oscillation of different amplitudes in space and in particular they can be macroscopically displaced with respect to each other. In this way, a cat state can be prepared.