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Estimation of a generalized amplitude-damping channel
Physical Review A, 2004The problem of finding the optimal strategy for estimating a generalized amplitude damping channel ${\ensuremath{\Gamma}}_{\ensuremath{\eta}}^{(p)}$ by means of the extension $\mathrm{id}\ensuremath{\bigotimes}{\ensuremath{\Gamma}}_{\ensuremath{\eta}}^{(p)}$ is addressed.
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Mimicking an Amplitude Damping Channel for Laguerre Gaussian Modes
Frontiers in Optics 2010/Laser Science XXVI, 2010An amplitude damping channel for Laguerre-Gaussian (LG) modes is presented. Experimentally the action of the channel on LG modes is in good agreement with that predicted theoretically.
A. Dudley +4 more
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Quantum uncertainty relations of quantum coherence and dynamics under amplitude damping channel
Chinese Physics B, 2018In this paper, we discuss quantum uncertainty relations of quantum coherence through a different method from Ref. [52]. Some lower bounds with parameters and their minimal bounds are obtained.
Fugang Zhang, Yongmin Li
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The Holevo capacity of a generalized amplitude-damping channel
Chinese Physics, 2007The Holevo capacity of a generalized amplitude-damping channel is investigated by using a numerical method. It is shown that the Holevo capacity depends on the channel parameters representing the ambient temperature and fidelity. In particular, under a special condition, the Holevo capacity of the generalized amplitude-damping channel can be written as
Hou Li-Zhen, Fang Mao-Fa
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Entanglement-enhanced classical communication through generalized amplitude damping channel
Chinese Physics, 2007The problem of sending a single classical bit through a generalized amplitude damping channel is considered. When two transmissions through the channel are available as a resource, we find that two entangled transmissions can enhance the capability of receiver's judging information correctly under certain conditions compared with two product-state ...
Hou Li-Zhen, Fang Mao-Fa
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Damping of displaced chaotic light field in amplitude dissipation channel*
Chinese Physics B, 2020We explore how a displaced chaotic light (DCL) behaves in an amplitude dissipation channel, and what is its time evolution formula of photon number distribution. With the use of the method of integration within ordered product product of operator (IWOP) and the new binomial theorem involving two-variable Hermite polynomials we obtain the evolution law ...
Ke Zhang, Lan-Lan Li, Hong-Yi Fan
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QUANTUM CAPACITY REGION OF SIMULTANEOUS AMPLITUDE AND PHASE DAMPED QUBIT CHANNEL
International Journal of Quantum Information, 2012A typical channel model of the decoherence of qubit is the simultaneous amplitude and phase damping. The parameter region of the channel is classified using the degradability and anti-degradability. It is shown that there is a large parameter region with zero quantum capacity. The formula for one-shot quantum capacity is also given.
Jiang, Li-Zhen, Chen, Xiao-Yu
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Conclusive quantum operation sharing in amplitude-damping channel
International Journal of Quantum InformationIn this paper, two conclusive multiparty quantum operation sharing (QOS) schemes in amplitude damping channel are proposed to respectively share partially unknown single-qubit unitary operations and single-qutrit unitary operations from the different restricted sets.
Yi Xiang +2 more
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Entanglement-Assisted Classical Capacity of a Generalized Amplitude Damping Channel
Chinese Physics Letters, 2007The entanglement-assisted capacity of a generalized amplitude damping channel is investigated by using the properties of partial symmetry and concavity of mutual information. The numerical and analytical results of the entanglement-assisted capacity are obtained under certain conditions.
Hou Li-Zhen, Fang Mao-Fa
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Quantum secure direct communication over the collective amplitude damping channel
Science in China Series G: Physics, Mechanics and Astronomy, 2009An efficient quantum secure direct communication protocol is presented over the amplitude damping channel. The protocol encodes logical bits in two-qubit noiseless states, and so it can function over a quantum channel subjected to collective amplitude damping.
SuJuan Qin +3 more
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