Results 121 to 130 of about 4,583,269 (264)

Four-dimensional entanglement distribution over 100 km

Scientific Reports, 2018
High-dimensional quantum entanglement can enrich the functionality of quantum information processing. For example, it can enhance the channel capacity for linear optic superdense coding and decrease the error rate threshold of quantum key distribution ...
Takuya Ikuta, Hiroki Takesue
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Breaking fundamental limits of quantum entanglement distribution with quantum switch

Tongxin xuebao
To solve the problem of low efficiency of entanglement distribution caused by quantum information easily lost in quantum channels, quantum switch was proposed to transmit quantum information.
XU Ruiqing, ZHOU Rigui, LI Yaochong
doaj  

Scalable programmable quantum gates and a new aspect of the additivity problem for the classical capacity of quantum channels [PDF]

, 2002
Andreas Winter
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Quantum coding with finite resources

Nature Communications, 2016
The maximal rate at which quantum information can be reliably communicated through many uses of a memoryless quantum channel is determined by its quantum channel capacity.
Marco Tomamichel, Mario Berta, Joseph M. Renes   +2 more
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Remarks on the classical capacity of quantum channel [PDF]

arXiv, 2002
A direct proof of the relation between the one-shot classical capacity and the minimal output entropy for covariant quantum channels is suggested. The structure of covariant channels is described in some detail. A simple proof of a general inequality for entanglement-assisted classical capacity is given.
arxiv  

Enhanced natural parameterized quantum circuit

Physical Review Research
The classical-quantum interface for loading classical data into quantum systems is an indispensable component of quantum information processing, and the parameterized quantum circuit (PQC) represents significant methodology in this area.
Yuquan Chen, Yanjun Hou, Zeyuan Wang, Tianyun Wang, Ze Wu, Zhaokai Li, Xinhua Peng   +6 more
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Quantum capacity is properly defined without encodings [PDF]

, 1998
Howard Barnum, John A. Smolin, Barbara M. Terhal   +2 more
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The Simultaneous Identification Capacity of the Classical--Quantum Multiple Access Channel [PDF]

arXiv, 2018
Here we discuss message identification, a problem formalized by Rudolf Ahlswede and Gunter Dueck, over a classical-quantum multiple access channel with two classical senders and one quantum receiver. We show that the simultaneous identification capacity, a capacity defined by Peter L\"ober, of this multiple access channel is equal to its message ...
arxiv  

On Quantum Capacity and its Bound [PDF]

Infinite Dimensional Analysis and Quantum Probability, Vol. 6,No.2 301-310, 2003, 2004
The quantum capacity of a pure quantum channel and that of classical-quantum-classical channel are discussed in detail based on the fully quantum mechanical mutual entropy. It is proved that the quantum capacity generalizes the so-called Holevo bound.
arxiv  

Standard super-activation for Gaussian channels requires squeezing

New Journal of Physics, 2013
The quantum capacity of bosonic Gaussian quantum channels can be non-additive in a particularly striking way: a pair of such optical fiber type channels can individually have zero quantum capacity but super-activate each other such that the combined ...
Daniel Lercher, Géza Giedke, Michael M Wolf   +2 more
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