Details
| Original language | English |
|---|---|
| Article number | 124007 |
| Journal | Journal of Physics B: Atomic, Molecular and Optical Physics |
| Volume | 45 |
| Issue number | 12 |
| Publication status | Published - 8 Jun 2012 |
Abstract
In lightmatter interfaces based on the Faraday effect, quite a number of quantum information protocols have been successfully demonstrated. In order to further increase the performance and fidelities achieved in these protocols, a deeper understanding of the relevant noise and decoherence processes needs to be gained. In this paper, we provide for the first time a complete description of the decoherence from spontaneous emission. We derive from first principles the effects of photons being spontaneously emitted into unobserved modes. Our results relate the resulting decay and noise terms in effective equations of motion for collective atomic spins and the forward-propagating light modes to the full atomic level structure. We illustrate and apply our results to the case of a quantum memory protocol. Our results can be applied to any alkali atoms, and the general approach taken in this paper can be applied to lightmatter interfaces and quantum memories based on different mechanisms.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 45, No. 12, 124007, 08.06.2012.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Quantum noise for Faraday lightmatter interfaces
AU - Vasilyev, Denis V.
AU - Hammerer, Klemens
AU - Korolev, N.
AU - Sorensen, A. S.
PY - 2012/6/8
Y1 - 2012/6/8
N2 - In lightmatter interfaces based on the Faraday effect, quite a number of quantum information protocols have been successfully demonstrated. In order to further increase the performance and fidelities achieved in these protocols, a deeper understanding of the relevant noise and decoherence processes needs to be gained. In this paper, we provide for the first time a complete description of the decoherence from spontaneous emission. We derive from first principles the effects of photons being spontaneously emitted into unobserved modes. Our results relate the resulting decay and noise terms in effective equations of motion for collective atomic spins and the forward-propagating light modes to the full atomic level structure. We illustrate and apply our results to the case of a quantum memory protocol. Our results can be applied to any alkali atoms, and the general approach taken in this paper can be applied to lightmatter interfaces and quantum memories based on different mechanisms.
AB - In lightmatter interfaces based on the Faraday effect, quite a number of quantum information protocols have been successfully demonstrated. In order to further increase the performance and fidelities achieved in these protocols, a deeper understanding of the relevant noise and decoherence processes needs to be gained. In this paper, we provide for the first time a complete description of the decoherence from spontaneous emission. We derive from first principles the effects of photons being spontaneously emitted into unobserved modes. Our results relate the resulting decay and noise terms in effective equations of motion for collective atomic spins and the forward-propagating light modes to the full atomic level structure. We illustrate and apply our results to the case of a quantum memory protocol. Our results can be applied to any alkali atoms, and the general approach taken in this paper can be applied to lightmatter interfaces and quantum memories based on different mechanisms.
UR - http://www.scopus.com/inward/record.url?scp=84862180645&partnerID=8YFLogxK
U2 - 10.1088/0953-4075/45/12/124007
DO - 10.1088/0953-4075/45/12/124007
M3 - Article
AN - SCOPUS:84862180645
VL - 45
JO - Journal of Physics B: Atomic, Molecular and Optical Physics
JF - Journal of Physics B: Atomic, Molecular and Optical Physics
SN - 0953-4075
IS - 12
M1 - 124007
ER -