Detection of Quantum Critical Points by a Probe Qubit

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dc.contributor.authorSuter, Dieter
dc.contributor.authorZhang, Jingfu
dc.contributor.authorPeng, Xinhua
dc.contributor.authorRajendran, Nageswaran
dc.date.accessioned2008-06-02T13:23:55Z
dc.date.available2008-06-02T13:23:55Z
dc.date.issued2008-03-13
dc.description.abstractQuantum 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.en
dc.identifier.citationZhang, Jingfu; Peng, Xinhua; Rajendran, Nageswaran; Suter, Dieter: Detection of Quantum Critical Points by a Probe Qubit. In: Physical Review Letters Jg. 100(2008), 100501.de
dc.identifier.doi10.1103/PhysRevLett.100.100501
dc.identifier.urihttp://hdl.handle.net/2003/25408
dc.identifier.urihttp://dx.doi.org/10.17877/DE290R-2907
dc.identifier.urlhttp://dx.doi.org/10.1103/PhysRevLett.100.100501
dc.language.isoende
dc.publisherThe American Physical Societyen
dc.rights©2008 The American Physical Societyen
dc.subject.ddc530
dc.titleDetection of Quantum Critical Points by a Probe Qubiten
dc.typeTextde
dc.type.publicationtypearticlede
dcterms.accessRightsrestricted
eldorado.identifier.urlhttps://e3.physik.tu-dortmund.de/~suter/eprints/134_QPT_by_ProbeQubit.pdf

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