Macroscopic superpositions in Bose-Josephson junctions: Controlling decoherence due to atom losses

K. Pawlowski, D. Spehner, A. Minguzzi, G. Ferrini

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

We study how macroscopic superpositions of coherent states produced by the nondissipative dynamics of binary mixtures of ultracold atoms are affected by atom losses. We identify different decoherence scenarios for symmetric or asymmetric loss rates and interaction energies in the two modes. In the symmetric case the quantum coherence in the superposition is lost after a single loss event. By tuning appropriately the energies we show that the superposition can be protected, leading to quantum correlations useful for atom interferometry even after many loss events.

Original languageEnglish (US)
Article number013606
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume88
Issue number1
DOIs
StatePublished - Jul 3 2013
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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