Erratum: Non-equilibrium dynamics of an unstable quantum pendulum explored in a spin-1 Bose–Einstein condensate

Gerving, Corey; Hoang, Thai M.; Land, B. J.; Anquez, Martin; Hamley, C. D.; Chapman, Michael

doi:10.1038/ncomms2849

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2018

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“…In this context the entanglement properties in an ensemble of qubits has been studied for some time now with many experimental realizations of entangled multipartite states. For a single ensemble or Bose-Einstein condensate (BEC), entangled states have also been realized where squeezed states and non-Gaussian states have been experimentally realized [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Adiabatic entangling gate of Bose-Einstein condensates based on the minimum function

Ortiz

Song

et al. 2018

Phys. Rev. A

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A scheme is presented to perform an entangling gate between two atomic ensembles or Bose-Einstein condensates in a optical cavity with a common optical mode. The method involves using a generalized Stimulated Raman Adiabatic Passage (STIRAP) to adiabatically evolve the ground state. We show that dark states exist for any atom number within the cavities, and find that the operation produces an unusual type of evolution where the minimum of the number of atoms between two level transitions to another state. This produces an unconventional type of entangling Hamiltonian which creates a phase depending on the minimum operation. We analyze its reliability under a variety of conditions ranging from the ideal decoherence-free case to that including photon loss and spontaneous emission. Ways of combating decoherence are analyzed and the amount of entanglement that is generated is calculated.

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