dorsal/arxiv
View SchemaQuantum back-action of optical observations on Bose condensates
| Authors | U. Leonhardt, T. Kiss, P. Piwnicki |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/9801048 |
| URL | https://arxiv.org/abs/quant-ph/9801048 |
| DOI | 10.1007/s100530050585 |
Abstract
Impressive pictures of moving Bose-Einstein condensates have been taken using phase-contrast imaging M. R. Andrews et al., Science 273, 84 (1996). We calculate the quantum backaction of this measurement technique. We find that phase-contrast imaging is not a quantum nondemolition measurement of the atomic density. Instead, the condensate gets gradually depleted at a rate that is proportional to the light intensity and to the inverse cube of the optical wave length. The fewer atoms are condensed the higher is the required intensity to see a picture, and, consequently, the higher is the induced backaction. To describe the quantum physics of phase-contrast imaging we put forward a new approach to quantum-optical propagation. We develop an effective field theory of paraxial optics in a fully quantized atomic medium.
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"abstract": "Impressive pictures of moving Bose-Einstein condensates have been taken using\nphase-contrast imaging M. R. Andrews et al., Science 273, 84 (1996). We\ncalculate the quantum backaction of this measurement technique. We find that\nphase-contrast imaging is not a quantum nondemolition measurement of the atomic\ndensity. Instead, the condensate gets gradually depleted at a rate that is\nproportional to the light intensity and to the inverse cube of the optical wave\nlength. The fewer atoms are condensed the higher is the required intensity to\nsee a picture, and, consequently, the higher is the induced backaction. To\ndescribe the quantum physics of phase-contrast imaging we put forward a new\napproach to quantum-optical propagation. We develop an effective field theory\nof paraxial optics in a fully quantized atomic medium.",
"arxiv_id": "quant-ph/9801048",
"authors": [
"U. Leonhardt",
"T. Kiss",
"P. Piwnicki"
],
"categories": [
"quant-ph"
],
"doi": "10.1007/s100530050585",
"title": "Quantum back-action of optical observations on Bose condensates",
"url": "https://arxiv.org/abs/quant-ph/9801048"
},
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