|
related topics |
{light, field, probe} |
{level, atom, field} |
{state, phys, rev} |
{cavity, atom, atoms} |
{state, states, coherent} |
{cos, sin, state} |
{photon, photons, single} |
{equation, function, exp} |
{operator, operators, space} |
{time, wave, function} |
{measurement, state, measurements} |
{temperature, thermal, energy} |
{information, entropy, channel} |
{algorithm, log, probability} |
{particle, mechanics, theory} |
|
Three-dimensional theory for interaction between atomic ensembles and
free-space light
L. -M. Duan, J. I. Cirac, P. Zoller
abstract: Atomic ensembles have shown to be a promising candidate for implementations
of quantum information processing by many recently-discovered schemes. All
these schemes are based on the interaction between optical beams and atomic
ensembles. For description of these interactions, one assumed either a
cavity-QED model or a one-dimensional light propagation model, which is still
inadequate for a full prediction and understanding of most of the current
experimental efforts which are actually taken in the three-dimensional free
space. Here, we propose a perturbative theory to describe the three-dimensional
effects in interaction between atomic ensembles and free-space light with a
level configuration important for several applications. The calculations reveal
some significant effects which are not known before from the other approaches,
such as the inherent mode-mismatching noise and the optimal mode-matching
conditions. The three-dimensional theory confirms the collective enhancement of
the signal-to-noise ratio which is believed to be one of the main advantage of
the ensemble-based quantum information processing schemes, however, it also
shows that this enhancement need to be understood in a more subtle way with an
appropriate mode matching method.
- oai_identifier:
- oai:arXiv.org:quant-ph/0205005
- categories:
- quant-ph
- comments:
- 16 pages, 9 figures
- doi:
- 10.1103/PhysRevA.66.023818
- arxiv_id:
- quant-ph/0205005
- journal_ref:
- Phys. Rev. A 66, 023818 (2002).
- created:
- 2002-05-01
Full article ▸
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