0000000000718711

AUTHOR

Ghasem Naeimi

showing 2 related works from this author

Coherence and entanglement dynamics of vibrating qubits

2017

We investigate the dynamics of coherence and entanglement of vibrating qubits. Firstly, we consider a single trapped ion qubit inside a perfect cavity and successively we use it to construct a bipartite system made of two of such subsystems, taken identical and noninteracting. As a general result, we find that qubit vibration can lead to prolonging initial coherence in both single-qubit and two-qubit system. However, despite of this coherence preservation, we show that the decay of the entanglement between the two qubits is sped up by the vibrational motion of the qubits. Furthermore, we highlight how the dynamics of photon-phonon correlations between cavity mode and vibrational mode, which…

Atomic and Molecular Physics and OpticFOS: Physical sciencesQuantum entanglementSquashed entanglement01 natural sciencesSettore FIS/03 - Fisica Della Materia010305 fluids & plasmasEntanglementComputer Science::Emerging TechnologiesQuantum mechanics0103 physical sciencesPhysical and Theoretical ChemistryElectrical and Electronic Engineering010306 general physicsQuantumVibrational modePhysicsQuantum PhysicsElectronic Optical and Magnetic MaterialQuantum PhysicsCavity modeAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsVibrationQubitQubitW stateQuantum Physics (quant-ph)Entanglement distillationCoherenceCoherence (physics)
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Quantum enhancement of qutrit dynamics through driving field and photonic-band-gap crystal

2022

A comparative study of a qutrit (three-level atomic system) coupled to a classical field in a typical Markovian reservoir (free space) and in a photonic band-gap (PBG) crystal is carried out. The aim of the study is to assess the collective impact of structured environment and classical control of the system on the dynamics of quantum coherence, non-Markovianity, and estimation of parameters which are initially encoded in the atomic state. We show that the constructive interplay of PBG material as a medium and classical driving field as a part of system results in a significant enhancement of all the quantum traits of interest, compared to the case when the driven qutrit is in a Markovian e…

QutritQuantum PhysicsQuantum Fisher InformationPhotonic Crystals: Photonic Band-Gap MaterialFOS: Physical sciencesNon-MarkovianityQuantumness ProtectionQuantum Physics (quant-ph)Settore FIS/03 - Fisica Della MateriaPhysical Review A
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