Experimental observation of a topological phase in the maximally entangled state of a pair of qubits

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dc.contributor.authorSuter, Dieter
dc.contributor.authorDu, Jiangfeng
dc.contributor.authorZhu, Jing
dc.contributor.authorShi, Mingjun
dc.contributor.authorPeng, Xinhua
dc.date.accessioned2008-06-02T13:02:09Z
dc.date.available2008-06-02T13:02:09Z
dc.date.issued2007-10-22
dc.description.abstractQuantum mechanical phase factors can be related to dynamical effects or to the geometrical properties of a trajectory in a given space—either parameter space or Hilbert space. Here, we experimentally investigate a quantum mechanical phase factor that reflects the topology of the SO(3) group: since rotations by pi around antiparallel axes are identical, this space is doubly connected. Using a pair of nuclear spins in a maximally entangled state, we subject one of the spins to a cyclic evolution. If the corresponding trajectory in SO(3) can be smoothly deformed to a point, the quantum state at the end of the trajectory is identical to the initial state. For all other trajectories the quantum state changes sign.en
dc.identifier.citationDu, J.; Zhu, J.; Shi, M.; Peng, X.; Suter, D.: Experimental observation of a topological phase in the maximally entangled state of a pair of qubits. In: Physical Review A Jg. 76(2007), 042121.de
dc.identifier.doi10.1103/PhysRevA.76.042121
dc.identifier.urihttp://hdl.handle.net/2003/25406
dc.identifier.urihttp://dx.doi.org/10.17877/DE290R-2901
dc.identifier.urlhttp://dx.doi.org/10.1103/PhysRevA.76.042121
dc.language.isoende
dc.publisherThe American PHysical Societyen
dc.rights©2007 The American Physical Societyen
dc.subject.ddc530
dc.titleExperimental observation of a topological phase in the maximally entangled state of a pair of qubitsen
dc.typeTextde
dc.type.publicationtypearticlede
dcterms.accessRightsrestricted
eldorado.identifier.urlhttp://e3.physik.tu-dortmund.de/~suter/eprints/TopologicalPhase_MES.pdf

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