The Effect of Field Changing on Two Qubit Entanglement with Different Criteria

• Authors: M. Mirzaee , M. Batavani
• Languages of publication: EN

Abstracts

EN

We investigate the effect of field changing on two qubit entanglement. We choose the coherent state, the cat state and the squeezed state as different states of interacting field with atom. The correlation between two qubits can be degraded by environmental noise, this phenomenon has been labelled sudden death of entanglement. The double Jaynes-Cummings model as a solvable model is used for describing the dynamic of sudden death of entanglement. We measure two-qubit entanglement using the concurrence and the negativity. The Fisher information is introduced, too, and compares results with previous entanglement measures. Finally we conclude that the Fisher information is not an entanglement measure.

Keywords

EN

03.65.Ud

Discipline

• 03.65.Ud: Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.)(for entanglement production and manipulation, see 03.67.Bg; for entanglement measures, witnesses etc., see 03.67.Mn; for entanglement in Bose-Einstein condensates, see 03.75.Gg)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 127
• Issue: 3
• Pages: 663-668

Dates

published

2015-03

received

2014-02-09

(unknown)

2014-12-14

(unknown)

2014-12-17

Contributors

author

M. Mirzaee

• Department of Physics, Faculty of Science, Arak University, Arak 38156-8-8349, Iran

author

M. Batavani

• Department of Physics, Faculty of Science, Arak University, Arak 38156-8-8349, Iran

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Identifiers

DOI

10.12693/APhysPolA.127.663