University of Birmingham > Talks@bham > Cold Atoms > Deterministic Generation of Entangled States of 40 Atoms by Quantum Zeno Dynamics

Deterministic Generation of Entangled States of 40 Atoms by Quantum Zeno Dynamics

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  • UserGiovanni Barontini (Imperial College)
  • ClockThursday 16 July 2015, 14:00-15:00
  • HousePhysics East 217.

If you have a question about this talk, please contact Vincent Boyer.

Multiparticle entangled quantum states, a key resource in quantum technology, are usually generated by coherent operations exclusively. However, powerful new forms of quantum dynamics can be obtained when environment coupling is used as part of the state generation. One intriguing example is Quantum Zeno Dynamics (QZD), which combines a unitary evolution with a measurement that projects into a multidimensional subspace of the Hilbert space, applied simultaneously. We have demonstrated the use of QZD , based on non-destructive measurement with an optical microcavity, to deterministically generate different multi-particle entangled states in an ensemble of 40 qubit atoms in less than 5 us. We have characterized the resulting states by performing quantum tomography, yielding a time-resolved account of the entanglement generation. We have also studied the dependence on the measurement strength, and quantified the depth of entanglement. Our results show that QZD is a versatile tool for fast and deterministic entanglement generation in quantum engineering applications.

This talk is part of the Cold Atoms series.

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