dorsal/arxiv
View SchemaScattering of dark-state polaritons in optical lattices and quantum phase gate for photons
| Authors | M. Masalas, M. Fleischhauer |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0402142 |
| URL | https://arxiv.org/abs/quant-ph/0402142 |
| DOI | 10.1103/PhysRevA.69.061801 |
Abstract
We discuss the quasi 1-D scattering of two counter-propagating, dark-state polaritons (DSP), each containing a single excitation. DSPs are formed from photons in media with electromagnetically induced transparency and are associated with ultra-slow group velocities. State-dependent elastic collisions of atoms at the same lattice site lead to a nonlinear interaction. It is shown that the scattering process in a deep optical lattice filled by cold atoms generates a large and homogeneous conditional phase shift between two individual polaritons. The latter has potential applications for a photonic phase gate. The quasi 1-D scattering problem is solved analytically and the influence of degrading processes such as dephasing due to collisions with ground-state atoms is discussed.
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"date_created": "2026-03-02T18:02:05.810000Z",
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"abstract": "We discuss the quasi 1-D scattering of two counter-propagating, dark-state\npolaritons (DSP), each containing a single excitation. DSPs are formed from\nphotons in media with electromagnetically induced transparency and are\nassociated with ultra-slow group velocities. State-dependent elastic collisions\nof atoms at the same lattice site lead to a nonlinear interaction. It is shown\nthat the scattering process in a deep optical lattice filled by cold atoms\ngenerates a large and homogeneous conditional phase shift between two\nindividual polaritons. The latter has potential applications for a photonic\nphase gate. The quasi 1-D scattering problem is solved analytically and the\ninfluence of degrading processes such as dephasing due to collisions with\nground-state atoms is discussed.",
"arxiv_id": "quant-ph/0402142",
"authors": [
"M. Masalas",
"M. Fleischhauer"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.69.061801",
"title": "Scattering of dark-state polaritons in optical lattices and quantum phase gate for photons",
"url": "https://arxiv.org/abs/quant-ph/0402142"
},
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