Adiabatic preparation of squeezed states of oscillators and large spin systems coupled to a two-level system

Abstract

We study a single two-level system coupled resonantly to an oscillator mode or a large spin. By adiabatically turning on a linear driving term on the oscillator or the spin, the eigenstates of the system change character and its ground state evolves into squeezed states of the oscillator or the spin. The robust generation of such states is of interest in many experimental systems with applications for sensing and quantum information processing.

Fast generation of cat states in Kerr nonlinear resonators via optimal adiabatic control

“…In conclusion, we develop adiabatic acceleration method by finding the optimal path and demonstrate that this method can be used to adiabatically prepare cat states in KNR. We hope that our method can serve as general method for preparing non-classical quantum states under adiabatic [78][79][80][81][82]. Moreover, the operation of the adiabatic quantum gate is by the adiabatic conditions, so its speed is very slow 84].…”

Approximate evolution for a system composed by two coupled Jaynes–Cummings Hamiltonians

“…The interaction between quantized light and matter has attracted a lot of interest over the years [1][2][3][4][5]. Probably the simplest model to study such interaction is by means of the Jaynes-Cummings (JC) model [1,2] which, via the so-called rotating wave approximation has an exact solution, its solutions have a very good agreement with those of the more general Rabi model [4] that takes into account counterrotating terms The JC model has allowed the generation of several non-classical states, among them, superpositions of coherent states [6], also called Schrödinger cats [7,8], number states [9] and squeezed states [10].…”

Sensing single atoms in a cavity using a broadband squeezed light

“…Benefit from the development of laser cooling and trapping technology [8,9], neutral atoms can be cooled from room temperature to sub-millikelvin, and subsequently keep atoms trapped at the single atom level for a long time [10]. Now, it is possible to strongly couple single or several trapped atoms to the cavity mode [11][12][13][14][15][16][17].…”