0000000000466115

AUTHOR

David Vitali

showing 3 related works from this author

Decoherence and robustness of parity-dependent entanglement in the dynamics of a trapped ion

2001

We study the entanglement between the 2D vibrational motion and two ground state hyperfine levels of a trapped ion, Under particular conditions this entanglement depends on the parity of the total initial vibrational quanta. We study the robustness of this quantum coherence effect with respect to the presence of non-dissipative sources of decoherence, and of an imperfect initial state preparation.

PhysicsQuantum PhysicsQuantum decoherencePhysics and Astronomy (miscellaneous)FOS: Physical sciencesParity (physics)Quantum PhysicsQuantum entanglementAtomic and Molecular Physics and OpticsIonRobustness (computer science)Quantum mechanicsQuantum Physics (quant-ph)Ground stateQuantumHyperfine structure
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Josephson Traveling Wave Parametric Amplifiers as Non-Classical Light Source for Microwave Quantum Illumination

2021

Abstract Detection of low-reflectivity objects can be enriched via the so-called quantum illumination procedure. In order that this quantum procedure outperforms classical detection protocols, entangled states of microwave radiation are initially required. In this paper, we discuss the role of Josephson Traveling Wave Parametric Amplifiers (JTWPAs), based on circuit-QED components, as suitable sources of a two-mode squeezed vacuum state, a special signal-idler entangled state. The obtained wide bandwidth makes the JTWPA an ideal candidate for generating quantum radiation in quantum metrology and information processing applications.

Vacuum stateMicrowave quantum illumination Josephson traveling wave parametric amplifiers Entangled quantum states Detection probability improvementFOS: Physical sciencesElectric apparatus and materials. Electric circuits. Electric networksSettore ING-INF/01 - ElettronicaIndustrial and Manufacturing EngineeringSettore FIS/03 - Fisica Della MateriaSuperconductivity (cond-mat.supr-con)OpticsJosephson traveling wave parametric amplifiersDetection probability improvement Entangled quantum states Josephson traveling wave parametric amplifiersMicrowave quantum illuminationQuantum metrologyMicrowave quantum illuminationElectrical and Electronic EngineeringTK452-454.4QuantumParametric statisticsPhysicsDetection probability improvementQuantum Physicsbusiness.industryAmplifierCondensed Matter - SuperconductivityBandwidth (signal processing)Entangled quantum statesElectronic Optical and Magnetic MaterialsMechanics of MaterialsQuantum illuminationbusinessQuantum Physics (quant-ph)Microwave
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Nondissipative Decoherence and Entanglement in the Dynamics of a Trapped Ion

2006

We study the robustness of the entanglement between the 2D vibrational motion and two ground state hyperfine levels of a trapped ion with respect to the presence of non-dissipative sources of decoherence.

PhysicsQuantum decoherenceQuantum mechanicsDynamics (mechanics)Physics::Atomic PhysicsQuantum PhysicsQuantum entanglementGround stateHyperfine structureIon
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