|
related topics |
{photon, photons, single} |
{measurement, state, measurements} |
{time, decoherence, evolution} |
{state, states, coherent} |
{light, field, probe} |
{cavity, atom, atoms} |
{level, atom, field} |
{time, wave, function} |
{field, particle, equation} |
{theory, mechanics, state} |
|
Quantum Trajectories for Realistic Detection
P. Warszawski, H. M. Wiseman, H. Mabuchi
abstract: Quantum trajectories describe the stochastic evolution of an open quantum
system conditioned on continuous monitoring of its output, such as by an ideal
photodetector. Here we derive (non-Markovian) quantum trajectories for
realistic photodetection, including the effects of efficiency, dead time,
bandwidth, electronic noise, and dark counts. We apply our theory to a
realistic cavity QED scenario and investigate the impact of such detector
imperfections on the conditional evolution of the system state. A practical
theory of quantum trajectories with realistic detection will be essential for
experimental and technological applications of quantum feedback in many areas.
- oai_identifier:
- oai:arXiv.org:quant-ph/0112129
- categories:
- quant-ph
- comments:
- 5 pages, 4 figures (3 .eps included, 1 jpeg as an additional file).
To be published in Phys. Rev. A
- doi:
- 10.1103/PhysRevA.65.023802
- arxiv_id:
- quant-ph/0112129
- journal_ref:
- PRA 65, 023802 (2002)
- created:
- 2001-12-21
Full article ▸
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