Efficient nonlocal two-step entanglement concentration protocol for three-level atoms in an arbitrary less-entangledW state using cavity input-output process

2014 ◽  
Vol 57 (8) ◽  
pp. 1511-1518 ◽  
Author(s):  
Ru Zhang ◽  
SuHua Zhou ◽  
Cong Cao
Keyword(s):  
Entanglement Concentration ◽  
Output Process ◽  
Input Output

Nonlocal entanglement concentration of separate nitrogen-vacancy centers coupling to microtoroidal resonators

2014 ◽  
Vol 14 (1&2) ◽  
pp. 107-121
Author(s):  
Chuan Wang ◽  
Yong Zhang ◽  
Ming Lei ◽  
Guang-sheng Jin ◽  
Hai-qiang Ma ◽  
...  
Keyword(s):  
Nitrogen Vacancy ◽  
Entanglement Concentration ◽  
Entangled State ◽  
Output Process ◽  
Parity Check ◽  
Input Output ◽  
Check Gate ◽  
Nitrogen Vacancy Centers ◽  
Microtoroidal Resonator ◽  
Nonlocal Entanglement

Here we propose two practical protocols to concentrate entanglement between separate nitrogen-vacancy (N-V) centers in less entangled state via coupling to microtoroidal resonators. We construct the parity check gate of the N-V center and microtoroidal resonator systems via the interaction with the ancillary photon input-output process near the microtoroidal resonators. Thus the parity of the N-V center state can be readout by the measurement on the ancillary photon. Then we introduce the parity check operations to entanglement concentration protocols. Considering current techniques, we also discuss the feasibility of our proposal and its experimental challenges.

Quantum gate operations using atomic qubits through cavity input-output process

2009 ◽  
Vol 87 (5) ◽  
pp. 50005 ◽  
Author(s):  
J. Song ◽  
Y. Xia ◽  
H.-S. Song
Keyword(s):  
Quantum Gate ◽  
Output Process ◽  
Input Output

Controlled Phase Flip Gate and Its Application in Low-Q Cavities by Single-Photon Input-Output Process

2012 ◽  
Vol 58 (2) ◽  
pp. 225-228
Author(s):  
Bo Wang ◽  
Qiong Chen ◽  
Wan-Li Yang ◽  
Su-Peng Kou
Keyword(s):  
Single Photon ◽  
Output Process ◽  
Input Output

scholarly journals Universal remote quantum computation assisted by the cavity input–output process

2015 ◽  
Vol 471 (2184) ◽  
pp. 20150274 ◽  
Author(s):  
Ming-Xing Luo ◽  
Xiaojun Wang
Keyword(s):  
Quantum Computation ◽  
Quantum Electrodynamics ◽  
Cavity Quantum Electrodynamics ◽  
Output Process ◽  
Input Output ◽  
Toffoli Gate ◽  
Classical Communication ◽  
Optical Cavities ◽  
Proposed Model ◽  
Einstein Podolsky Rosen

Quantum computing may provide potential superiority to solve some difficult problems. We propose a scheme for scalable remote quantum computation based on an interface between the photon and the spin of an electron confined in a quantum dot embedded in a microcavity. By successively interacting auxiliary photon pulses with spins charged in optical cavities, a prototypical quantum controlled–controlled flip gate (Toffoli gate) is achieved on a remote three-spin system using only one Einstein–Podolsky–Rosen entanglement, and local operations and classical communication. Our proposed model is shown to be robust to practical noise and experimental imperfections in current cavity–quantum electrodynamics techniques.

Modeling of Stochastic Von Neumann Model of Mobile Service

2011 ◽  
Vol 474-476 ◽  
pp. 11-14
Author(s):  
Fang Qin Xu ◽  
Lei Jiang
Keyword(s):  
Singular Systems ◽  
Mobile Services ◽  
Mobile Service ◽  
Output Process ◽  
Input Output ◽  
Parameter Uncertainties ◽  
Von Neumann ◽  
General Systems ◽  
The Stability ◽  
Neumann Model

A stochastic Von Neumann model to describe companies’ input-output process on mobile services is provided. Through the theories from input-output economics, an extended singular stochastic Von Neumann model on mobile service is researched. The problem of stability of this kind of stochastic Von Neumann model on mobile services is researched. A new mathematic method is applied to study the singular systems without converting them into general systems. The parameter uncertainties are considered. A new stability criterion for the extended stochastic Von Neumann model is given to ensure the stability of input-output model.

ON THE DISCRETE-TIME G/GI/∞ QUEUE

2008 ◽  
Vol 22 (4) ◽  
pp. 557-585 ◽  
Author(s):  
Iddo Eliazar
Keyword(s):  
Fixed Points ◽  
Discrete Time ◽  
Generating Functions ◽  
Random Variables ◽  
Output Process ◽  
Input Output ◽  
Input Process ◽  
Probability Generating Functions ◽  
Queue Model ◽  
Multidimensional Probability

The discrete-time G/GI/∞ queue model is explored. Jobs arrive to an infinite-server queuing system following an arbitrary input process X; job sizes are general independent and identically distributed random variables. The system's output process Y (of job departures) and queue process N (tracking the number of jobs present in the system) are analyzed. Various statistics of the stochastic maps X↦ Y and X↦ N are explicitly obtained, including means, variances, autocovariances, cross-covariances, and multidimensional probability generating functions. In the case of stationary inputs, we further compute the spectral densities of the stochastic maps, characterize the fixed points (in the L2 sense) of the input–output map, precisely determine when the output and queue processes display either short-ranged or long-ranged temporal dependencies, and prove a decomposition result regarding the intrinsic L2 structure of general stationary G/GI/∞ systems.

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