Storing quantum information in a generalised Dicke model via a simple rotation
Abstract
A method for storing quantum information is presented for threelevel atomic systems interacting dipolarly with a single radiation field. The method involves performing simple local SU(2) rotations on the Hamiltonian. Under equal detuning, these transformations decouple one of the atomic levels from the electromagnetic field for the Λ and Vconfigurations, yielding two effective twolevel systems (qubits) plus an isolated atomic level; this allows for the exchange of information between the qubits. This rotation preserves the quantum phase diagram of the system. The method could possibly be used as a means to manipulate quantum information, such as storage and retrieval, or communication via a transmission line.
 Publication:

Journal of Physics A Mathematical General
 Pub Date:
 October 2023
 DOI:
 10.1088/17518121/acfbca
 arXiv:
 arXiv:2306.00105
 Bibcode:
 2023JPhA...56P5303L
 Keywords:

 fieldmatter interaction;
 Dicke model;
 quantum information;
 quantum phase diagram;
 Quantum Physics
 EPrint:
 17 pages, 6 figures