Three musketeers of a quantum channel: Backlog, delay, and throughput

2020 ◽  
Vol 2 (4) ◽  
Author(s):  
Liu‐Guo Yin
Keyword(s):  
Quantum Channel ◽  
Three Musketeers

Mapping quantum channel decoherence

2020 ◽  
Author(s):  
Daniel E. Jones ◽  
Gabriele Riccardi ◽  
Cristian Antonelli ◽  
Michael Brodsky
Keyword(s):  
Quantum Channel

scholarly journals Fundamental limitations on distillation of quantum channel resources

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Bartosz Regula ◽  
Ryuji Takagi
Keyword(s):  
Lower Bounds ◽  
Quantum Channel ◽  
Quantum Communication ◽  
Fault Tolerant ◽  
State Of The Art ◽  
Quantum Systems ◽  
Noisy Channels ◽  
General Transformation ◽  
Fundamental Limitations ◽  
Strong Converse

AbstractQuantum channels underlie the dynamics of quantum systems, but in many practical settings it is the channels themselves that require processing. We establish universal limitations on the processing of both quantum states and channels, expressed in the form of no-go theorems and quantitative bounds for the manipulation of general quantum channel resources under the most general transformation protocols. Focusing on the class of distillation tasks — which can be understood either as the purification of noisy channels into unitary ones, or the extraction of state-based resources from channels — we develop fundamental restrictions on the error incurred in such transformations, and comprehensive lower bounds for the overhead of any distillation protocol. In the asymptotic setting, our results yield broadly applicable bounds for rates of distillation. We demonstrate our results through applications to fault-tolerant quantum computation, where we obtain state-of-the-art lower bounds for the overhead cost of magic state distillation, as well as to quantum communication, where we recover a number of strong converse bounds for quantum channel capacity.

scholarly journals Acoustoelectric effect in a finite-length ballistic quantum channel

2000 ◽  
Vol 62 (11) ◽  
pp. 7283-7288 ◽  
Author(s):  
O. Entin-Wohlman ◽  
Y. Levinson ◽  
Yu. M. Galperin
Keyword(s):  
Finite Length ◽  
Quantum Channel ◽  
Acoustoelectric Effect
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