6533b829fe1ef96bd1289b69
RESEARCH PRODUCT
Robust entanglement preparation against noise by controlling spatial indistinguishability
Farzam NosratiFarzam NosratiGiuseppe CompagnoAlessia CastelliniRosario Lo Francosubject
Computer Networks and CommunicationsComputer scienceInitializationFOS: Physical sciencesContext (language use)Quantum entanglementNoise (electronics)Measure (mathematics)lcsh:QA75.5-76.95Settore FIS/03 - Fisica Della MateriaEntanglementComputer Science (miscellaneous)Statistical physicsQuantumQuantum PhysicsQuantum resourcesStatistical and Nonlinear PhysicsQuantum Physicslcsh:QC1-999Quantum technologyComputational Theory and MathematicsQubitOpen quantum systemlcsh:Electronic computers. Computer scienceQuantum Physics (quant-ph)lcsh:PhysicsQuantum indistinguishabilitydescription
Initialization of composite quantum systems into highly entangled states is usually a must to allow their use for quantum technologies. However, the presence of unavoidable noise in the preparation stage makes the system state mixed, thus limiting the possibility of achieving this goal. Here we address this problem in the context of identical particle systems. We define the entanglement of formation for an arbitrary state of two identical qubits within the operational framework of spatially localized operations and classical communication (sLOCC). We then introduce an entropic measure of spatial indistinguishability under sLOCC as an information resource. We show that spatial indistinguishability, even partial, may shield entanglement from noise, guaranteeing Bell inequality violations. These results prove the fundamental role of particle identity as a control for efficient noise-protected entanglement generation.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-06-28 |