Relation between initial conditions and entanglement sudden death for two-qubit extended Werner-like states

We investigate the entanglement dynamics of a system that consists of four single-mode cavities that are spatially separated and connected by two optical fibers, with multiple two-level atoms trapped in each cavity. It is shown that the phenomenon of entanglement sudden death and sudden birth appears in this system and is sensitive to the initial conditions and the parameter r. In addition, we also study the entanglement and entangled state transfer between the atoms and find that a perfect transfer can be realized if the value of the parameter r satisfies a certain condition, established here.

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Initial conditions and entanglement sudden death

Physics Letters A ◽

10.1016/j.physleta.2012.08.007 ◽

2012 ◽

Vol 376 (45) ◽

pp. 2931-2934 ◽

Cited By ~ 11

Author(s):

Xiao-Feng Qian ◽

J.H. Eberly

Keyword(s):

Sudden Death ◽

Initial Conditions ◽

Entanglement Sudden Death

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Manipulation of entanglement sudden death in an all-optical setup

Journal of the Optical Society of America B ◽

10.1364/josab.34.000681 ◽

2017 ◽

Vol 34 (3) ◽

pp. 681 ◽

Cited By ~ 6

Author(s):

Ashutosh Singh ◽

Siva Pradyumna ◽

A. R. P. Rau ◽

Urbasi Sinha

Keyword(s):

Sudden Death ◽

Entanglement Sudden Death ◽

Optical Setup ◽

All Optical

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Coherent state quantum key distribution based on entanglement sudden death

Quantum Information Processing ◽

10.1007/s11128-015-1063-4 ◽

2015 ◽

Vol 15 (3) ◽

pp. 1117-1133

Author(s):

Gregg Jaeger ◽

David Simon ◽

Alexander V. Sergienko

Keyword(s):

Sudden Death ◽

Coherent State ◽

Quantum Key Distribution ◽

Key Distribution ◽

Entanglement Sudden Death

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Manipulating entanglement sudden death in two coupled two-level atoms interacting off-resonance with a radiation field: an exact treatment

Optics Express ◽

10.1364/oe.27.033799 ◽

2019 ◽

Vol 27 (23) ◽

pp. 33799 ◽

Cited By ~ 4

Author(s):

Gehad Sadiek ◽

Wiam Al-Drees ◽

M. Sebaweh Abdallah

Keyword(s):

Sudden Death ◽

Radiation Field ◽

Entanglement Sudden Death

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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-breaking channels and entanglement sudden death

Physical Review A ◽

10.1103/physreva.94.012345 ◽

2016 ◽

Vol 94 (1) ◽

Cited By ~ 5

Author(s):

Laura T. Knoll ◽

Christian T. Schmiegelow ◽

Osvaldo Jiménez Farías ◽

Stephen P. Walborn ◽

Miguel A. Larotonda

Keyword(s):

Sudden Death ◽

Entanglement Sudden Death

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DECAY OF COHERENCE AND ENTANGLEMENT OF A SUPERPOSITION STATE FOR A CONTINUOUS VARIABLE SYSTEM IN AN ARBITRARY HEAT BATH

International Journal of Quantum Information ◽

10.1142/s0219749910006587 ◽

2010 ◽

Vol 08 (05) ◽

pp. 755-763

Author(s):

G. W. FORD ◽

R. F. O'CONNELL

Keyword(s):

Sudden Death ◽

Heat Bath ◽

Continuous Variable ◽

Time Development ◽

Gaussian State ◽

Entanglement Sudden Death ◽

Equation Approach ◽

Superposition State ◽

Master Equation Approach ◽

Non Gaussian

We consider the case of a pair of particles initially in a superposition state corresponding to a separated pair of wave packets. In contrast to a previous related work, we avoid a master equation approach and we calculate exactly the time development of this non-Gaussian state due to interaction with an arbitrary heat bath. We find that coherence decays continuously, as expected. We then investigate entanglement and find that at a finite time the system becomes separable (not entangled). Thus, we see that entanglement sudden death is also prevalent in continuous variable systems which should raise concern for the designers of entangled systems.

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