Extended photon correlation in a negative-temperature medium

Ooi, Chong Heng Raymond (2008) Extended photon correlation in a negative-temperature medium. Physical Review A, 77 (5). 053820. ISSN 2469-9926, DOI https://doi.org/10.1103/PhysRevA.77.053820.

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Official URL: https://doi.org/10.1103/PhysRevA.77.053820


We show how two-photon correlation of a two-level amplifier in the small signal regime depends on the atomic populations and the propagation length. We predict that inverted population associated with negative temperature gives a very long correlation time even in the presence of decoherence, a useful asset for quantum communication. The correlation vanishes for very dilute atomic gas. Analytical solutions for the field operators obtained by Fourier transform and Laplace transform (with initial condition) of the time variable appear very different but yield identical numerical results except for certain parameters. The physical explanation behind the deviation is given. The presence of thermal photons is found to reduce the correlation time.

Item Type: Article
Additional Information: Department of Physics, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA
Uncontrolled Keywords: Resonance fluorescence; Laser-amplifier; Quantum-theory
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Department of Physics
Depositing User: Miss Malisa Diana
Date Deposited: 08 Jul 2013 07:37
Last Modified: 09 Oct 2019 07:12
URI: http://eprints.um.edu.my/id/eprint/7945

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