dorsal/arxiv
View SchemaStochastic Resonance Phenomena in Quantum Many-Body Systems
| Authors | Susana Huelga, Martin Plenio |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0608164 |
| URL | https://arxiv.org/abs/quant-ph/0608164 |
| DOI | 10.1103/PhysRevLett.98.170601 |
| Journal | Phys. Rev. Lett. 98,170601 (2007) |
Abstract
We discuss stochastic resonance (SR) effects in driven coupled quantum systems. We construct dynamical and information theoretic measures of the system's response that exhibit a non-monotonic behaviour as a function of the noise strength. We analyze the relation between lack of monotonicity in the response and the presence of quantum correlations and identify parameter regimes where the breakdown of a linear response can be linked to the presence of entanglement. We also show that a chain of coupled spin systems can exhibit an array-enhanced response, where the sensitivity of a single resonator is enhanced as a result of nearest-neighbour coupling. These results enlarge the domain where SR effects exist and should be observable in arrays of superconducting qubits.
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"abstract": "We discuss stochastic resonance (SR) effects in driven coupled quantum\nsystems. We construct dynamical and information theoretic measures of the\nsystem\u0027s response that exhibit a non-monotonic behaviour as a function of the\nnoise strength. We analyze the relation between lack of monotonicity in the\nresponse and the presence of quantum correlations and identify parameter\nregimes where the breakdown of a linear response can be linked to the presence\nof entanglement. We also show that a chain of coupled spin systems can exhibit\nan array-enhanced response, where the sensitivity of a single resonator is\nenhanced as a result of nearest-neighbour coupling. These results enlarge the\ndomain where SR effects exist and should be observable in arrays of\nsuperconducting qubits.",
"arxiv_id": "quant-ph/0608164",
"authors": [
"Susana Huelga",
"Martin Plenio"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevLett.98.170601",
"journal_ref": "Phys. Rev. Lett. 98,170601 (2007)",
"title": "Stochastic Resonance Phenomena in Quantum Many-Body Systems",
"url": "https://arxiv.org/abs/quant-ph/0608164"
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