dorsal/arxiv
View SchemaMagneto-optical rotation and cross-phase modulation via coherently driven tripod atoms
| Authors | David Petrosyan, Yuri P. Malakyan |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0402070 |
| URL | https://arxiv.org/abs/quant-ph/0402070 |
| DOI | 10.1103/PhysRevA.70.023822 |
| Journal | Phys. Rev. A 70, 023822 (2004) |
Abstract
We study the interaction of a weak probe field, having two orthogonally polarized components, with an optically dense medium of four-level atoms in a tripod configuration. In the presence of a coherent driving laser, electromagnetically induced transparency is attained in the medium, dramatically enhancing its linear as well as nonlinear dispersion while simultaneously suppressing the probe field absorption. We present the semiclassical and fully quantum analysis of the system. We propose an experimentally feasible setup that can induce large Faraday rotation of the probe field polarization and therefore be used for ultra-sensitive optical magnetometry. We then study the Kerr nonlinear coupling between the two components of the probe, demonstrating a novel regime of symmetric, extremely efficient cross-phase modulation, capable of fully entangling two single-photon pulses. This scheme may thus pave the way to photon-based quantum information applications, such as deterministic all-optical quantum computation, dense coding and teleportation.
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"abstract": "We study the interaction of a weak probe field, having two orthogonally\npolarized components, with an optically dense medium of four-level atoms in a\ntripod configuration. In the presence of a coherent driving laser,\nelectromagnetically induced transparency is attained in the medium,\ndramatically enhancing its linear as well as nonlinear dispersion while\nsimultaneously suppressing the probe field absorption. We present the\nsemiclassical and fully quantum analysis of the system. We propose an\nexperimentally feasible setup that can induce large Faraday rotation of the\nprobe field polarization and therefore be used for ultra-sensitive optical\nmagnetometry. We then study the Kerr nonlinear coupling between the two\ncomponents of the probe, demonstrating a novel regime of symmetric, extremely\nefficient cross-phase modulation, capable of fully entangling two single-photon\npulses. This scheme may thus pave the way to photon-based quantum information\napplications, such as deterministic all-optical quantum computation, dense\ncoding and teleportation.",
"arxiv_id": "quant-ph/0402070",
"authors": [
"David Petrosyan",
"Yuri P. Malakyan"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.70.023822",
"journal_ref": "Phys. Rev. A 70, 023822 (2004)",
"title": "Magneto-optical rotation and cross-phase modulation via coherently driven tripod atoms",
"url": "https://arxiv.org/abs/quant-ph/0402070"
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