dorsal/arxiv
View SchemaA study of quantum decoherence in a system with Kolmogorov-Arnol'd-Moser tori
| Authors | G. H. Ball, K. M. D. Vant, H. Ammann, N. L. Christensen |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/9902006 |
| URL | https://arxiv.org/abs/quant-ph/9902006 |
| DOI | 10.1088/1464-4266/1/4/301 |
Abstract
We present an experimental and numerical study of the effects of decoherence on a quantum system whose classical analogue has Kolmogorov-Arnol'd-Moser (KAM) tori in its phase space. Atoms are prepared in a caesium magneto-optical trap at temperatures and densities which necessitate a quantum description. This real quantum system is coupled to the environment via spontaneous emission. The degree of coupling is varied and the effects of this coupling on the quantum coherence of the system are studied. When the classical diffusion through a partially broken torus is < hbar, diffusion of quantum particles is inhibited. We find that increasing decoherence via spontaneous emission increases the transport of quantum particles through the boundary.
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"abstract": "We present an experimental and numerical study of the effects of decoherence\non a quantum system whose classical analogue has Kolmogorov-Arnol\u0027d-Moser (KAM)\ntori in its phase space. Atoms are prepared in a caesium magneto-optical trap\nat temperatures and densities which necessitate a quantum description. This\nreal quantum system is coupled to the environment via spontaneous emission. The\ndegree of coupling is varied and the effects of this coupling on the quantum\ncoherence of the system are studied. When the classical diffusion through a\npartially broken torus is \u003c hbar, diffusion of quantum particles is inhibited.\nWe find that increasing decoherence via spontaneous emission increases the\ntransport of quantum particles through the boundary.",
"arxiv_id": "quant-ph/9902006",
"authors": [
"G. H. Ball",
"K. M. D. Vant",
"H. Ammann",
"N. L. Christensen"
],
"categories": [
"quant-ph"
],
"doi": "10.1088/1464-4266/1/4/301",
"title": "A study of quantum decoherence in a system with Kolmogorov-Arnol\u0027d-Moser tori",
"url": "https://arxiv.org/abs/quant-ph/9902006"
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