dorsal/arxiv
View SchemaDecoherence in a superconducting ring
| Authors | S. Khlebnikov |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0010072 |
| URL | https://arxiv.org/abs/quant-ph/0010072 |
Abstract
A superconducting ring has different sectors of states corresponding to different values of the trapped magnetic flux; this multitude of states can be used for quantum information storage. If a current supporting a nonzero flux is set up in the ring, fluctuations of electromagnetic field will be able to ``detect'' that current and thus cause a loss of quantum coherence. We estimate the decoherence exponent for a ring of a round type-II wire and find that it contains a macroscopic suppression factor $(\delta / R_{1})^{2}$, where $R_{1}$ is the radius of the wire, and $\delta$ is the London penetration depth. We present some encouraging numerical estimates based on this result.
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"abstract": "A superconducting ring has different sectors of states corresponding to\ndifferent values of the trapped magnetic flux; this multitude of states can be\nused for quantum information storage. If a current supporting a nonzero flux is\nset up in the ring, fluctuations of electromagnetic field will be able to\n``detect\u0027\u0027 that current and thus cause a loss of quantum coherence. We estimate\nthe decoherence exponent for a ring of a round type-II wire and find that it\ncontains a macroscopic suppression factor $(\\delta / R_{1})^{2}$, where $R_{1}$\nis the radius of the wire, and $\\delta$ is the London penetration depth. We\npresent some encouraging numerical estimates based on this result.",
"arxiv_id": "quant-ph/0010072",
"authors": [
"S. Khlebnikov"
],
"categories": [
"quant-ph",
"cond-mat.supr-con"
],
"title": "Decoherence in a superconducting ring",
"url": "https://arxiv.org/abs/quant-ph/0010072"
},
"schema_id": "dorsal/arxiv",
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"execution_id": "c312d68d-9873-44fe-a953-be05d29dfa5a",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
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