Topological quantum glassiness
Topological quantum glassiness
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拓扑量子玻璃态
DOI:
10.1080/14786435.2011.609152
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发表时间:
2012
影响因子:
1.6
通讯作者:
Castelnovo C
中科院分区:
文献类型:
--
作者:
Castelnovo C
Quantum tunneling often allows pathways to relaxation past energy barriers which are otherwise hard to overcome classically at low temperatures. However, this is not always the case. In this paper we provide exactly solvable examples where the barriers each system encounters on its approach to lower and lower energy states become increasingly wide and eventually scale with the system size. If the environment coupleslocallyto the physical degrees of freedom in the system, tunneling under these barriers requires processes whose order in perturbation theory is proportional to the width of the barrier. This results in quantum relaxation rates that are exponentially suppressed in system size: For these quantum systems, nophysicalbath can provide a mechanism for relaxation that is not dynamically arrested at low temperatures. The examples discussed here are drawn from three-dimensional generalizations of Kitaev's toric code, originally devised in the context of topological quantum computing. They are devoid of any local order parameters or symmetry breaking and are examples of topological quantum glasses. We construct systems that have slow dynamics similar to either strong or fragile glasses. The example with fragile-like relaxation is interesting in that the topological defects are neither open strings nor regular open membranes, but fractal objects with dimensiond* = ln3/ln2.
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DOI:
10.1088/0305-4470/30/21/012
发表时间:
1997-11-07
期刊:
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL
影响因子:
--
作者:
Lipowski, A
通讯作者:
Lipowski, A
影响因子:
8.6
作者:
A. Buhot;J. P. Garrahan
通讯作者:
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DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
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通讯作者:
B. Terhal
DOI:
10.1073/pnas.92.15.6675
发表时间:
1995-07-18
影响因子:
11.1
作者:
ANGELL, CA
通讯作者:
ANGELL, CA
DOI:
--
发表时间:
2000
期刊:
Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
影响因子:
--
作者:
J. P. Garrahan;M. Newman
通讯作者:
M. Newman