Detection of quantum critical points by a probe qubit

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dc.creatorZhang, Jingfu
dc.creatorPeng, Xinhua
dc.creatorRajendran, Nageswaran
dc.creatorSuter, Dieter
dc.date2007-09-20
dc.date2008-03-14
dc.date.accessioned2026-07-07T09:26:29Z
dc.date.available2026-07-07T09:26:29Z
dc.descriptionQuantum phase transitions occur when the ground state of a quantum system undergoes a qualitative change when an external control parameter reaches a critical value. Here, we demonstrate a technique for studying quantum systems undergoing a phase transition by coupling the system to a probe qubit. It uses directly the increased sensibility of the quantum system to perturbations when it is close to a critical point. Using an NMR quantum simulator, we demonstrate this measurement technique for two different types of quantum phase transitions in an Ising spin chain.
dc.descriptionA typo removed. Publication version
dc.identifierhttps://arxiv.org/abs/0709.3273
dc.identifierhttp://arxiv.org/abs/0709.3273
dc.identifierPhys. Rev. Lett. 100, 100501 (2008)
dc.identifierdoi:10.1103/PhysRevLett.100.100501
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/156770
dc.subjectQuantum Physics
dc.titleDetection of quantum critical points by a probe qubit
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