RT Journal Article
T1 Mesoscopic mean-field theory for spin-boson chains in quantum optical systems
A1 Nevado Serrano, Pedro
A1 Porras Torres, Diego
AB We present a theoretical description of a system of many spins strongly coupled to a bosonic chain. We rely on the use of a spin-wave theory describing the Gaussian fluctuations around the mean-field solution, and focus on spin-boson chains arising as a generalization of the Dicke Hamiltonian. Our model is motivated by experimental setups such as trapped ions, or atoms/qubits coupled to cavity arrays. This situation corresponds to the cooperative (E circle times beta) Jahn-Teller distortion studied in solid-state physics. However, the ability to tune the parameters of the model in quantum optical setups opens up a variety of novel intriguing situations. The main focus of this paper is to review the spin-wave theoretical description of this problem as well as to test the validity of mean-field theory. Our main result is that deviations from mean-field effects are determined by the interplay between magnetic order and mesoscopic cooperativity effects, being the latter strongly size-dependent.
PB Springer Heidelberg
SN 1951-6355
YR 2013
FD 2013-02
LK https://hdl.handle.net/20.500.14352/35601
UL https://hdl.handle.net/20.500.14352/35601
LA eng
NO © Springer HeidelbergWe acknowledge QUITEMAD S2009-ESP-1594, FIS2009-10061, CAM-UCM/910758 and RyC Contract Y200200074, and COST action ”IOTA”.
NO Ministerio de Ciencia e Innovación (MICINN)
NO Comunidad de Madrid
NO Comunidad de Madrid/Universidad Complutense de Madrid
NO RyC
NO COST
DS Docta Complutense
RD 7 abr 2025