dorsal/arxiv
View SchemaDecoherence problem in quantum state transfer via an engineered spin chain
| Authors | Lan Zhou, Jing Lu, Tao Shi, C. P. Sun |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0608135 |
| URL | https://arxiv.org/abs/quant-ph/0608135 |
Abstract
A perfect quantum state transfer(QST) has been shown in an engineered spin chain with "always-on interaction". Here, we consider a more realistic problem for such a protocol, the quantum decoherence induced by a spatially distributed environment, which is universally modeled as a bath of harmonic oscillators. By making use of the irreducible tensor method in angular momentum theory, we investigate the effect of decoherence on the efficiency of QST for both cases at zero and finite temperatures. We not only show the generic exponential decay of QST efficiency as the number of sites increase, but also find some counterintuitive effect, the QST can be enhanced as temperature increase.
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"abstract": "A perfect quantum state transfer(QST) has been shown in an engineered spin\nchain with \"always-on interaction\". Here, we consider a more realistic problem\nfor such a protocol, the quantum decoherence induced by a spatially distributed\nenvironment, which is universally modeled as a bath of harmonic oscillators. By\nmaking use of the irreducible tensor method in angular momentum theory, we\ninvestigate the effect of decoherence on the efficiency of QST for both cases\nat zero and finite temperatures. We not only show the generic exponential decay\nof QST efficiency as the number of sites increase, but also find some\ncounterintuitive effect, the QST can be enhanced as temperature increase.",
"arxiv_id": "quant-ph/0608135",
"authors": [
"Lan Zhou",
"Jing Lu",
"Tao Shi",
"C. P. Sun"
],
"categories": [
"quant-ph"
],
"title": "Decoherence problem in quantum state transfer via an engineered spin chain",
"url": "https://arxiv.org/abs/quant-ph/0608135"
},
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"execution_id": "41740a79-b016-45e6-b949-59ef9bf41b3f",
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"variant": "snapshot-2026-03-01",
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