Linear Optical Realization of Qubit Purification with Quantum Amplitude Damping Channel

2007 ◽  
Vol 24 (7) ◽  
pp. 1809-1812 ◽  
Author(s):  
Lin Qing ◽  
Li Jian ◽  
Guo Guang-Can
Keyword(s):  
Amplitude Damping ◽  
Amplitude Damping Channel ◽  
Quantum Amplitude ◽  
Linear Optical ◽  
Optical Realization

scholarly journals CALCULATING A MAXIMIZER FOR QUANTUM MUTUAL INFORMATION

2008 ◽  
Vol 06 (supp01) ◽  
pp. 745-750 ◽  
Author(s):  
T. C. DORLAS ◽  
C. MORGAN
Keyword(s):  
Mutual Information ◽  
State Capacity ◽  
Convex Combination ◽  
Product State ◽  
Not Given ◽  
Classical Information ◽  
Amplitude Damping Channel ◽  
Quantum Amplitude ◽  
Memoryless Channels ◽  
Quantum Mutual Information

We obtain a maximizer for the quantum mutual information for classical information sent over the quantum amplitude damping channel. This is achieved by limiting the ensemble of input states to antipodal states, in the calculation of the product state capacity for the channel. We also consider the product state capacity of a convex combination of two memoryless channels and demonstrate in particular that it is in general not given by the minimum of the capacities of the respective memoryless channels.

Quantum correlation versus Bell-inequality violation under the amplitude damping channel

2015 ◽  
Vol 379 (43-44) ◽  
pp. 2802-2807 ◽  
Author(s):  
WenChao Ma ◽  
Shuai Xu ◽  
Jiadong Shi ◽  
Liu Ye
Keyword(s):  
Quantum Correlation ◽  
Bell Inequality ◽  
Amplitude Damping ◽  
Amplitude Damping Channel

The Holevo capacity of a generalized amplitude-damping channel

2007 ◽  
Vol 16 (7) ◽  
pp. 1843-1847 ◽  
Author(s):  
Hou Li-Zhen ◽  
Fang Mao-Fa
Keyword(s):  
Amplitude Damping ◽  
Amplitude Damping Channel

Time evolution law of the Laguerre-polynomial-weighted chaotic photon field in an amplitude-damping channel

2015 ◽  
Vol 93 (3) ◽  
pp. 283-289 ◽  
Author(s):  
Cheng Da ◽  
Qian-Fan Chen ◽  
Peng-Fei Zhang ◽  
Hong-Yi Fan
Keyword(s):  
Decay Rate ◽  
Time Evolution ◽  
Generating Function ◽  
Density Operator ◽  
Laguerre Polynomial ◽  
Hermite Polynomials ◽  
Evolution Law ◽  
Amplitude Damping ◽  
Photon Field ◽  
Amplitude Damping Channel

We examine how a Laguerre-polynomial-weighted chaotic photon field (LPWCPF), whose density operator is [Formula: see text], evolves in an amplitude-damping channel. By using a newly derived generating function of two-variable Hermite polynomials we obtain the evolution law of LPWCPF, which turns out to be a new LPWCPF with a new parameter, depending on 1 − e−2κt, where κ represents decay rate. The technique of integration (summation) within an ordered product of operators is used in our discussions.

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