Macroscopic maximally entangled state preparation between two atomic ensembles
Abstract
We develop a scheme to prepare a macroscopic maximally entangled state (MMES) between two atomic ensembles using adaptive quantum nondemolition (QND) measurements. The quantum state of the system is evolved using a sequence of QND measurements followed by adaptive unitaries, such that the desired measurement outcome is obtained with asymptotically unit probability. This procedure is repeated in z and x spin basis alternately such that the state converges deterministically towards the maximally entangled state. Up to a local spin-basis rotation, the maximally entangled state has zero total spin angular momentum, i.e. it is a singlet state. Our protocol does not perform postselection and works beyond the Holstein-Primakoff regime for the atomic spin degrees of freedom, producing genuine macroscopic entanglement.
Cite
@article{arxiv.2302.07526,
title = {Macroscopic maximally entangled state preparation between two atomic ensembles},
author = {Manish Chaudhary and Ebubechukwu O. Ilo-Okeke and Valentin Ivannikov and Tim Byrnes},
journal= {arXiv preprint arXiv:2302.07526},
year = {2023}
}
Comments
14 pages, 9 figures (Accepted in PRA journal, 2023)