dorsal/arxiv
View SchemaHeat Capacity as A Witness of Entanglement
| Authors | Marcin Wiesniak, Vlatko Vedral, Caslav Brukner |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0508193 |
| URL | https://arxiv.org/abs/quant-ph/0508193 |
| DOI | 10.1103/PhysRevB.78.064108 |
| Journal | Phys. Rev. B 78, 064108 (2008) |
| License | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
Abstract
We demonstrate that the presence of entanglement in macroscopic bodies (e.g. solids) in thermodynamical equilibrium could be revealed by measuring heat-capacity. The idea is that if the system were in a separable state, then for certain Hamiltonians heat capacity would not tend asymptotically to zero as the temperature approaches absolute zero. Since this would contradict the third law of thermodynamics, one concludes that the system must contain entanglement. The separable bounds are obtained by minimization of the heat capacity over separable states and using its universal low-temperature behavior. Our results open up a possibility to use standard experimental techniques of solid state physics -- namely, heat capacity measurements -- to detect entanglement in macroscopic samples.
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"abstract": "We demonstrate that the presence of entanglement in macroscopic bodies (e.g.\nsolids) in thermodynamical equilibrium could be revealed by measuring\nheat-capacity. The idea is that if the system were in a separable state, then\nfor certain Hamiltonians heat capacity would not tend asymptotically to zero as\nthe temperature approaches absolute zero. Since this would contradict the third\nlaw of thermodynamics, one concludes that the system must contain entanglement.\nThe separable bounds are obtained by minimization of the heat capacity over\nseparable states and using its universal low-temperature behavior. Our results\nopen up a possibility to use standard experimental techniques of solid state\nphysics -- namely, heat capacity measurements -- to detect entanglement in\nmacroscopic samples.",
"arxiv_id": "quant-ph/0508193",
"authors": [
"Marcin Wiesniak",
"Vlatko Vedral",
"Caslav Brukner"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevB.78.064108",
"journal_ref": "Phys. Rev. B 78, 064108 (2008)",
"license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
"title": "Heat Capacity as A Witness of Entanglement",
"url": "https://arxiv.org/abs/quant-ph/0508193"
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