Measuring and engineering entropy and spin squeezing in weakly linked Bose-Einstein condensates

Abstract

We propose a method to infer the single-particle entropy of bosonic atoms in an optical lattice and to study the local evolution of entropy, spin squeezing, and entropic inequalities for entanglement detection in such systems. This method is based on experimentally feasible measurements of non-nearest-neighbour coherences. We study a specific example of dynamically controlling atom tunneling between selected sites and show that this could potentially also improve the metrologically relevant spin squeezing.

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Cited by in corpus (4)

• Classical stochastic measurement trajectories: Bosonic atomic gases in an optical cavity and quantum measurement backaction
• Quantum teleportation of spin coherent states: beyond continuous variables teleportation
• Dynamical disentangling and cooling of atoms in bilayer optical lattices
• Cavity quantum electrodynamics of continuously monitored Bose-condensed atoms