Extended photon correlation in a negative-temperature medium
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 usef...
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my.um.eprints.79452019-10-09T07:12:58Z http://eprints.um.edu.my/7945/ Extended photon correlation in a negative-temperature medium Ooi, Chong Heng Raymond QC Physics 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. American Physical Society 2008 Article PeerReviewed Ooi, Chong Heng Raymond (2008) Extended photon correlation in a negative-temperature medium. Physical Review A, 77 (5). 053820. ISSN 2469-9926 https://doi.org/10.1103/PhysRevA.77.053820 doi:10.1103/PhysRevA.77.053820 |
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QC Physics Ooi, Chong Heng Raymond Extended photon correlation in a negative-temperature medium |
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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. |
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Article |
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Ooi, Chong Heng Raymond |
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Ooi, Chong Heng Raymond |
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Ooi, Chong Heng Raymond |
title |
Extended photon correlation in a negative-temperature medium |
title_short |
Extended photon correlation in a negative-temperature medium |
title_full |
Extended photon correlation in a negative-temperature medium |
title_fullStr |
Extended photon correlation in a negative-temperature medium |
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Extended photon correlation in a negative-temperature medium |
title_sort |
extended photon correlation in a negative-temperature medium |
publisher |
American Physical Society |
publishDate |
2008 |
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http://eprints.um.edu.my/7945/ https://doi.org/10.1103/PhysRevA.77.053820 |
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13.18916 |