Counterdiabatic driving in spin squeezing and Dicke state preparation
Quantum Physics
2016-03-23 v2
Abstract
A method is presented to transfer a system of two-level atoms from a spin coherent state to a maximally spin squeezed Dicke state, relevant for quantum metrology and quantum information processing. The initial state is the ground state of an initial linear Hamiltonian which is gradually turned into a final quadratic Hamiltonian whose ground state is the selected Dicke state. We use compensating operators to suppress diabatic transitions to unwanted states that would occur if the change were not slow. We discuss the possibilities of constructing the compensating operators by sequential application of quadratic Hamiltonians available in experiments.
Keywords
Cite
@article{arxiv.1510.07261,
title = {Counterdiabatic driving in spin squeezing and Dicke state preparation},
author = {Tomáš Opatrný and Hamed Saberi and Etienne Brion and Klaus Mølmer},
journal= {arXiv preprint arXiv:1510.07261},
year = {2016}
}
Comments
10 pages, 10 figures. Replaced with published version