scholarly journals Fast generation of three-qubit Greenberger-Horne-Zeilinger state based on the Lewis-Riesenfeld invariants in coupled cavities

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Xiao-Bin Huang ◽  
Ye-Hong Chen ◽  
Zhe Wang
Keyword(s):  
Information Processing ◽  
Quantum Information ◽  
Numerical Simulations ◽  
Spontaneous Emission ◽  
Optical Fibers ◽  
Quantum Information Processing ◽  
Ghz State ◽  
Adiabatic Passage ◽  
Coupled Cavities ◽  
Efficient Scheme

Abstract In this paper, we propose an efficient scheme to fast generate three-qubit Greenberger-Horne-Zeilinger (GHZ) state by constructing shortcuts to adiabatic passage (STAP) based on the “Lewis-Riesenfeld (LR) invariants” in spatially separated cavities connected by optical fibers. Numerical simulations illustrate that the scheme is not only fast, but robust against the decoherence caused by atomic spontaneous emission, cavity losses and the fiber photon leakages. This might be useful to realize fast and noise-resistant quantum information processing for multi-qubit systems.

scholarly journals Dynamics of entanglement and non-classical correlation for four-qubit GHZ state

2015 ◽  
Vol 13 (06) ◽  
pp. 1550044 ◽  
Author(s):  
P. Espoukeh ◽  
R. Rahimi ◽  
S. Salimi ◽  
P. Pedram
Keyword(s):  
Information Processing ◽  
Quantum Information ◽  
Quantum Discord ◽  
Quantum Information Processing ◽  
Ghz State ◽  
Classical Correlation ◽  
Qubit System ◽  
The Many ◽  
Sudden Transition

Many-qubit entanglement is crucial for quantum information processing although its exploitation is hindered by the detrimental effects of the environment surrounding the many-qubit system. It is thus of importance to study the dynamics of general multipartite non-classical correlation, including but not restricted to entanglement, under noise. We did this study for four-qubit Greenberger–Horne–Zeilinga (GHZ) state under most common noises in an experiment and found that non-classical correlation is more robust than entanglement except when it is imposed to dephasing channel. Quantum discord presents a sudden transition in its dynamics for Pauli-X and Pauli-Y noises as well as Bell-diagonal states interacting with dephasing reservoirs and it decays monotonically for Pauli-Z and isotropic noises.

scholarly journals Application of adiabatic passage in Rydberg atomic ensembles for quantum information processing

2020 ◽  
Vol 53 (18) ◽  
pp. 182001 ◽  
Author(s):  
I I Beterov ◽  
D B Tretyakov ◽  
V M Entin ◽  
E A Yakshina ◽  
I I Ryabtsev ◽  
...  
Keyword(s):  
Information Processing ◽  
Quantum Information ◽  
Quantum Information Processing ◽  
Adiabatic Passage ◽  
Atomic Ensembles
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