INFLUENCE OF DIPOLE-DIPOLE INTERACTION ON DYNAMICS OF ENTANGLED GREENBERGER — HORNE — ZEILINGER STATES FOR TWO QUBITS

The influence of dipole-dipole interaction on dynamics of three- and four-particle GHZ states for two Д-type superconducting flux cubits interacting with one or two different electronic LC cavities via two-photon processes has been investigated. The results show that dipole-dipole interaction does not lead to the disappearance of the effect of entanglement sudden death and does not change the maximum degree of entanglement.

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Entanglement sudden death via two-photon processes in cavity QED

Journal of Physics B Atomic Molecular and Optical Physics ◽

10.1088/0953-4075/42/19/195507 ◽

2009 ◽

Vol 42 (19) ◽

pp. 195507 ◽

Cited By ~ 10

Author(s):

W B Cardoso ◽

A T Avelar ◽

B Baseia ◽

N G de Almeida

Keyword(s):

Sudden Death ◽

Cavity Qed ◽

Entanglement Sudden Death ◽

Two Photon

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ENTANGLEMENT DYNAMICS OF TWO QUBITS COUPLED TO SQUEEZED DISSIPATIVE ENVIRONMENTS

Modern Physics Letters B ◽

10.1142/s0217984910024948 ◽

2010 ◽

Vol 24 (26) ◽

pp. 2635-2645

Author(s):

CHUAN-JIA SHAN ◽

TAO CHEN ◽

JI-BING LIU ◽

WEI-WEN CHENG ◽

TANG-KUN LIU ◽

...

Keyword(s):

Steady State ◽

Sudden Death ◽

Entangled States ◽

Entanglement Sudden Death ◽

Entanglement Dynamics ◽

Initial Product ◽

System Parameters ◽

Initial States ◽

Dissipative Environments ◽

Degree Of Entanglement

By analytically solving the Lindblad form of the master equation, we investigate entanglement dynamics of two qubits coupled via the XY interaction, where each qubit is interacting with an independent reservoir with the squeezing parameters and squeezing angles. In the weak-squeezed reservoir, we show that the entanglement sudden death and entanglement sudden birth will happen for various entangled states. Some initial product states evolve into entangled ones, initially entangled states lose completely or partially their entanglement. The effects of varying the degree of entanglement of the initial states, the spin chain system parameters and different values of the degree of squeezing on the sudden death, revival and birth times are analyzed in detail. We also see that the steady state concurrence appears in the squeezed dissipative environments, which is affected by both the system parameters and the degree of squeezing.

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THE INFLUENCE OF DIPOLE-DIPOLE INTERACTION ON THE SUDDEN DEATH OF ENTANGLEMENT OF TWO ATOMS WITH DEGENERATE TWO-PHOTON TRANSITIONS

Vestnik of Samara University Natural Science Series ◽

10.18287/2541-7525-2011-17-2-164-170 ◽

2017 ◽

Vol 17 (2) ◽

pp. 164-170

Author(s):

E.K. Bashkirov ◽

A.M. Evdokimova ◽

M.S. Mastyugin

Keyword(s):

Sudden Death ◽

Dipole Interaction ◽

Two Photon ◽

Initial States

The influence of dipole-dipole interaction on the entanglement between twoatoms with different initial W-like states in Tavis-Cummings model with degenerate two-photon transitions has been investigated. The results show that theentanglement between two atoms can be increased by means of dipole-dipoleinteraction and for some initial states the sudden death effect can be weakened.

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