Authors: | Suter, Dieter Du, Jiangfeng Zhu, Jing Shi, Mingjun Peng, Xinhua |
Title: | Experimental observation of a topological phase in the maximally entangled state of a pair of qubits |
Language (ISO): | en |
Abstract: | Quantum 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. |
URI: | http://hdl.handle.net/2003/25406 http://dx.doi.org/10.17877/DE290R-2901 |
Publishers Link: | http://e3.physik.tu-dortmund.de/~suter/eprints/TopologicalPhase_MES.pdf |
Issue Date: | 2007-10-22 |
Provenance: | The American PHysical Society |
URL: | http://dx.doi.org/10.1103/PhysRevA.76.042121 |
Citation: | Du, 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. |
Appears in Collections: | Suter, Dieter Prof. Dr. |
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