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      Quantum Zeno Suppression of Intramolecular Forces

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      Author
      Wüster, S.
      Date
      2017
      Source Title
      Physical Review Letters
      Print ISSN
      0031-9007
      Publisher
      American Physical Society
      Volume
      119
      Issue
      1
      Pages
      1 - 6
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      We show that Born-Oppenheimer surfaces can intrinsically decohere, implying loss of coherence among constituent electronic basis states. We consider the example of interatomic forces due to resonant dipole-dipole interactions within a dimer of highly excited Rydberg atoms, embedded in an ultracold gas. These forces rely on a coherent superposition of two-atom electronic states, which is destroyed by continuous monitoring of the dimer state through a detection scheme utilizing the background gas atoms. We show that this intrinsic decoherence of the molecular energy surface can gradually deteriorate a repulsive dimer state, causing a mixing of attractive and repulsive character. For sufficiently strong decoherence, a Zeno-like effect causes a complete cessation of interatomic forces. We finally show how short decohering pulses can controllably redistribute population between the different molecular energy surfaces.
      Keywords
      Atoms
      Quantum theory
      Born-Oppenheimer
      Coherent superpositions
      Continuous monitoring
      Dipole dipole interactions
      Interatomic forces
      Intramolecular forces
      Intrinsic decoherence
      Molecular energies
      Dimers
      Permalink
      http://hdl.handle.net/11693/37126
      Published Version (Please cite this version)
      http://dx.doi.org/10.1103/PhysRevLett.119.013001
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      • Department of Physics 2380
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