Sustainable entangled state of two qubits with time-dependent dipole-dipole interaction under coherent electromagnetic field influence

2017 ◽  
Author(s):  
Alexander A. Biryukov ◽  
Mark A. Shleenkov
Keyword(s):  
Electromagnetic Field ◽  
Dipole Interaction ◽  
Time Dependent ◽  
Entangled State ◽  
Field Influence

INFLUENCE OF INTRINSIC DECOHERENCE ON THE ENTANGLEMENT BETWEEN TWO ATOMS IN TAVIS–CUMMINGS MODEL

2008 ◽  
Vol 06 (01) ◽  
pp. 167-179
Author(s):  
CHUAN-JIA SHAN ◽  
WEI-WEN CHENG ◽  
TANG-KUN LIU ◽  
YAN-XIA HUANG ◽  
HONG LI ◽  
...  
Keyword(s):  
Strong Coupling ◽  
Quantum State ◽  
Dipole Interaction ◽  
Entangled State ◽  
Entanglement Dynamics ◽  
Initial State ◽  
Intrinsic Decoherence ◽  
Dipole Coupling ◽  
Fock State

Considering the dipole–dipole coupling intensity between two atoms and the field in the Fock state, the entanglement dynamics between two atoms that are initially entangled in the Tavis–Cummings model with intrinsic decoherence have been investigated. The two-atom entanglement appears with periodicity without considering intrinsic decoherence. However, the intrinsic decoherence causes the decay of entanglement between two atoms, with the decrease of the intrinsic decoherence coefficient, the entanglement will quickly become a constant value, which is affected by the two-atom initial state, the dipole–dipole coupling intensity and the field in the Fock state. Meanwhile, the two-atom quantum state will stay forever in the maximal entangled state when the initial state is proper, even in the presence of intrinsic decoherence. Furthermore, the two atoms can generate maximal entangled state even if they are initially separated by adjusting the dipole–dipole interaction, the strong coupling can improve the value of entanglement.

scholarly journals Some Aspects of Mathematical Modeling of the Electromagnetic Field Influence on the Human Brain

2019 ◽  
Vol 3 (1) ◽  
pp. 12-16
Author(s):  
Alina Prigancová ◽  
Michal Hvoždara ◽  
Igor Túnyi ◽  
Yuriy Gorgo ◽  
Sergii Mamilov
Keyword(s):  
Mathematical Modeling ◽  
Electromagnetic Field ◽  
Human Brain ◽  
Field Influence

GENERATION OF GRAPH-STATE ENTANGLEMENT WITH ATOMIC ENSEMBLES VIA THE DIPOLE BLOCKADE MECHANISM

2011 ◽  
Vol 09 (01) ◽  
pp. 547-554
Author(s):  
HONG XIE ◽  
MEI-XIANG CHEN
Keyword(s):  
Dipole Interaction ◽  
Entangled State ◽  
Linear Optics ◽  
Atomic Ensembles ◽  
Graph State ◽  
Single Spin ◽  
Generating Graph ◽  
Spin Excitations ◽  
Dipole Blockade ◽  
The Many

A scheme is proposed for generating graph-state entanglement between many atomic ensembles. In this scheme, the photons are transferred from the single-"spin" excitations of the atomic ensembles via the dipole blockade mechanism, which act as ancillary qubits and interfere with each other on linear optics apparatus. The quantum-entangled state of the atomic ensembles can be obtained under the conditional detection of the photons. Since the single-"spin" excitations can be deterministically created via strong long-range dipole–dipole interaction and the transferred efficiency is enhanced by the many-atom interference effects, our scheme can work with a high probability of success.

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