dorsal/arxiv
View SchemaContinuous quantum nondemolition feedback and unconditional atomic spin squeezing
| Authors | L. K. Thomsen, S. Mancini, H. M. Wiseman |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0208160 |
| URL | https://arxiv.org/abs/quant-ph/0208160 |
| DOI | 10.1088/0953-4075/35/23/316 |
| Journal | J. Phys. B: At. Mol. Opt. Phys. 35 (2002) 4937-4952 |
Abstract
We discuss the theory and experimental considerations of a quantum feedback scheme for producing deterministically reproducible spin squeezing. Continuous nondemolition atom number measurement from monitoring a probe field conditionally squeezes the sample. Simultaneous feedback of the measurement results controls the quantum state such that the squeezing becomes unconditional. We find that for very strong cavity coupling and a limited number of atoms, the theoretical squeezing approaches the Heisenberg limit. Strong squeezing will still be produced at weaker coupling and even in free space (thus presenting a simple experimental test for quantum feedback). The measurement and feedback can be stopped at any time, thereby freezing the sample with a desired amount of squeezing.
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"abstract": "We discuss the theory and experimental considerations of a quantum feedback\nscheme for producing deterministically reproducible spin squeezing. Continuous\nnondemolition atom number measurement from monitoring a probe field\nconditionally squeezes the sample. Simultaneous feedback of the measurement\nresults controls the quantum state such that the squeezing becomes\nunconditional. We find that for very strong cavity coupling and a limited\nnumber of atoms, the theoretical squeezing approaches the Heisenberg limit.\nStrong squeezing will still be produced at weaker coupling and even in free\nspace (thus presenting a simple experimental test for quantum feedback). The\nmeasurement and feedback can be stopped at any time, thereby freezing the\nsample with a desired amount of squeezing.",
"arxiv_id": "quant-ph/0208160",
"authors": [
"L. K. Thomsen",
"S. Mancini",
"H. M. Wiseman"
],
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"quant-ph"
],
"doi": "10.1088/0953-4075/35/23/316",
"journal_ref": "J. Phys. B: At. Mol. Opt. Phys. 35 (2002) 4937-4952",
"title": "Continuous quantum nondemolition feedback and unconditional atomic spin squeezing",
"url": "https://arxiv.org/abs/quant-ph/0208160"
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