Efficient scheme for multipartite entanglement and quantum information processing using atomic ensembles

2003 ◽  
Vol 319 (3-4) ◽  
pp. 225-232 ◽  
Author(s):  
Peng Xue ◽  
Guang-Can Guo
Keyword(s):  
Information Processing ◽  
Quantum Information ◽  
Quantum Information Processing ◽  
Multipartite Entanglement ◽  
Atomic Ensembles ◽  
Efficient Scheme

scholarly journals Construction of genuinely entangled subspacesand the associated bounds on entanglement measures for mixed states

2021 ◽  
Author(s):  
Konstantin Antipin
Keyword(s):  
Information Processing ◽  
Quantum Information ◽  
Lower Bounds ◽  
Quantum Information Processing ◽  
Multipartite Entanglement ◽  
Quantum Channels ◽  
Valuable Resource ◽  
Mixed States ◽  
Entanglement Measures ◽  
Pure States

Abstract Genuine entanglement is the strongest form of multipartite entanglement. Genuinely entangled pure states contain entanglement in every bipartition and as such can be regarded as a valuable resource in the protocols of quantum information processing. A recent direction of research is the construction of genuinely entangled subspaces — the class of subspaces consisting entirely of genuinely entangled pure states. In this paper we present methods of construction of such subspaces including those of maximal possible dimension. The approach is based on the composition of bipartite entangled subspaces and quantum channels of certain types. The examples include maximal subspaces for systems of three qubits, four qubits, three qutrits. We also provide lower bounds on two entanglement measures for mixed states, the concurrence and the convex-roof extended negativity, which are directly connected with the projection on genuinely entangled subspaces.

scholarly journals Dipole Blockade and Quantum Information Processing in Mesoscopic Atomic Ensembles

2001 ◽  
Vol 87 (3) ◽  
Author(s):  
M. D. Lukin ◽  
M. Fleischhauer ◽  
R. Cote ◽  
L. M. Duan ◽  
D. Jaksch ◽  
...  
Keyword(s):  
Information Processing ◽  
Quantum Information ◽  
Quantum Information Processing ◽  
Atomic Ensembles ◽  
Dipole Blockade

scholarly journals DECOHERENCE-FREE QUANTUM MEMORY FOR PHOTONIC STATE USING ATOMIC ENSEMBLES

2009 ◽  
Vol 07 (04) ◽  
pp. 811-820 ◽  
Author(s):  
FENG MEI ◽  
YA-FEI YU ◽  
ZHI-MING ZHANG
Keyword(s):  
Information Processing ◽  
Quantum Information ◽  
Large Scale ◽  
Quantum Information Processing ◽  
Single Photon ◽  
Quantum Memory ◽  
Single Photon Detection ◽  
Atomic Ensembles ◽  
Optical Elements ◽  
Photonic State

Large scale quantum information processing requires stable and long-lived quantum memories. Here, using atom-photon entanglement, we propose an experimentally feasible scheme to realize decoherence-free quantum memory with atomic ensembles, and show one of its applications, remote transfer of unknown quantum state, based on laser manipulation of atomic ensembles, photonic state operation through optical elements, and single-photon detection with moderate efficiency. The scheme, with inherent fault-tolerance to the practical noise and imperfections, allows one to retrieve the information in the memory for further quantum information processing within the reach of current technology.

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

PHOTONIC INFORMATION STORAGE AND QUANTUM INFORMATION PROCESSING IN ATOMIC ENSEMBLES

2002 ◽  
Author(s):  
J. HAGER ◽  
A. FLEISCHHAUER ◽  
A. MAIR ◽  
D. F. PHILLIPS ◽  
R. L. WALSWORTH ◽  
...  
Keyword(s):  
Information Processing ◽  
Quantum Information ◽  
Quantum Information Processing ◽  
Information Storage ◽  
Atomic Ensembles

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.

Sign in / Sign up

Export Citation Format

Share Document