6533b82dfe1ef96bd1291da5
RESEARCH PRODUCT
Coherence and entanglement dynamics of vibrating qubits
Ghasem NaeimiRosario Lo FrancoAli Mortezapoursubject
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)description
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 may serve as a further useful resource stored in the single-qubit system, is strongly affected by the initial state of the qubit. These results provide new insights about the ability of systems made of moving qubits in maintaining quantum resources compared to systems of stationary qubits.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-11-01 |