6533b820fe1ef96bd127917f

RESEARCH PRODUCT

Quantifying, characterizing, and controlling information flow in ultracold atomic gases

Suzanne McendooSuzanne McendooG. De ChiaraG. De ChiaraPinja HaikkaSabrina ManiscalcoSabrina ManiscalcoG. M. Palma

subject

Condensed Matter::Quantum GasesPhysicsQuantum PhysicsFlux qubitFOS: Physical sciencesQuantum simulator-One-way quantum computerAtomic and Molecular Physics and OpticsPhase qubitOpen quantum systemQuantum Gases (cond-mat.quant-gas)QubitBECs entanglement quantum information theory open quantum systemsStatistical physicsQuantum informationAtomic physicsCondensed Matter - Quantum GasesQuantum Physics (quant-ph)Trapped ion quantum computer

description

We study quantum information flow in a model comprising of an impurity qubit immersed in a Bose-Einstein condensed reservoir. We demonstrate how information flux between the qubit and the condensate can be manipulated by engineering the ultracold reservoir within experimentally realistic limits. We place a particular emphasis on non-Markovian dynamics, characterized by a reversed flow of information from the background gas to the qubit and identify a controllable crossover between Markovian and non-Markovian dynamics in the parameter space of the model.

https://doi.org/10.1103/physreva.84.031602