dorsal/arxiv
View SchemaAspects of quantum coherence in the optical Bloch equations
| Authors | A. S. Sanz, H. Han, P. Brumer |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0604082 |
| URL | https://arxiv.org/abs/quant-ph/0604082 |
| DOI | 10.1063/1.2200703 |
| Journal | J. Chem. Phys. 124, 214106 (2006) |
Abstract
Aspects of coherence and decoherence are analyzed within the optical Bloch equations. By rewriting the analytic solution in an alternate form, we are able to emphasize a number of unusual features: (a) despite the Markovian nature of the bath, coherence at long times can be retained; (b) the long-time asymptotic degree of coherence in the system is intertwined with the asymptotic difference in level populations; (c) the traditional population-relaxation and decoherence times, $T_1$ and $T_2$, lose their meaning when the system is in the presence of an external field, and are replaced by more general overall timescales; (d) increasing the field strength, quantified by the Rabi frequency, $\Omega$, increases the rate of decoherence rather than reducing it, as one might expect; and (e) maximum asymptotic coherence is reached when the system parameters satisfy $\Omega^2 = 1/(T_1 T_2)$.
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"abstract": "Aspects of coherence and decoherence are analyzed within the optical Bloch\nequations. By rewriting the analytic solution in an alternate form, we are able\nto emphasize a number of unusual features: (a) despite the Markovian nature of\nthe bath, coherence at long times can be retained; (b) the long-time asymptotic\ndegree of coherence in the system is intertwined with the asymptotic difference\nin level populations; (c) the traditional population-relaxation and decoherence\ntimes, $T_1$ and $T_2$, lose their meaning when the system is in the presence\nof an external field, and are replaced by more general overall timescales; (d)\nincreasing the field strength, quantified by the Rabi frequency, $\\Omega$,\nincreases the rate of decoherence rather than reducing it, as one might expect;\nand (e) maximum asymptotic coherence is reached when the system parameters\nsatisfy $\\Omega^2 = 1/(T_1 T_2)$.",
"arxiv_id": "quant-ph/0604082",
"authors": [
"A. S. Sanz",
"H. Han",
"P. Brumer"
],
"categories": [
"quant-ph"
],
"doi": "10.1063/1.2200703",
"journal_ref": "J. Chem. Phys. 124, 214106 (2006)",
"title": "Aspects of quantum coherence in the optical Bloch equations",
"url": "https://arxiv.org/abs/quant-ph/0604082"
},
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