scholarly journals Ultimate limits of approximate unambiguous discrimination

2020 ◽  
Vol 2 (4) ◽  
Author(s):  
Quntao Zhuang
Keyword(s):  
Unambiguous Discrimination

Optimal unambiguous discrimination of pure qudits

2013 ◽  
Vol 13 (2) ◽  
pp. 503-511 ◽  
Author(s):  
Wen-Hai Zhang ◽  
Long-Bao Yu ◽  
Zhuo-Liang Cao ◽  
Liu Ye
Keyword(s):  
Unambiguous Discrimination

Two-color hybridization with high complexity chromosome-specific probes and a degenerate alpha satellite probe DNA allows unambiguous discrimination between symmetrical and asymmetrical translocations

Chromosoma ◽  
1991 ◽  
Vol 100 (6) ◽  
pp. 371-376 ◽  
Author(s):  
Heinz-Ulrich G. Weier ◽  
Joe N. Lucas ◽  
Marilyn Poggensee ◽  
Richard Segraves ◽  
Daniel Pinkel ◽  
...  
Keyword(s):  
Alpha Satellite ◽  
High Complexity ◽  
Unambiguous Discrimination

On impact of a priori classical knowledge of discriminated states on the optimal unambiguous discrimination

2008 ◽  
Vol 8 (10) ◽  
pp. 951-964
Author(s):  
M. Zhang ◽  
Z.-T. Zhou ◽  
H.-Y. Dai ◽  
D.-W. Hu
Keyword(s):  
A Priori ◽  
Quantum States ◽  
A Priori Knowledge ◽  
Single System ◽  
Heisenberg Uncertainty Principle ◽  
Unambiguous Discrimination ◽  
Fundamental Limitations ◽  
Heisenberg Uncertainty ◽  
Classical Knowledge ◽  
Priori Knowledge

Due to the fundamental limitations related to the Heisenberg uncertainty principle and the non-cloning theorem, it is impossible, even in principle, to determine the quantum state of a single system without a priori knowledge of it. To discriminate nonorthogonal quantum states in some optimal way, a priori knowledge of the discriminated states has to be relied upon. In this paper, we thoroughly investigate some impact of a priori classical knowledge of two quantum states on the optimal unambiguous discrimination. It is exemplified that a priori classical knowledge of the discriminated states, incomplete or complete, can be utilized to improve the optimal success probabilities, whereas the lack of a prior classical knowledge can not be compensated even by more resources.

Upper bounds on the performance of differential-phase-shift quantum key distribution

2009 ◽  
Vol 9 (1&2) ◽  
pp. 62-80
Author(s):  
H. Gomez-Sousa ◽  
M. Curty
Keyword(s):  
Phase Shift ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Upper Bounds ◽  
The State ◽  
Differential Phase Shift ◽  
Differential Phase ◽  
Unambiguous Discrimination

In this paper, we investigate limitations imposed by sequential attacks on the performance of a differential-phase-shift (DPS) quantum key distribution (QKD) protocol with weak coherent pulses. Specifically, we analyze a sequential attack based on optimal unambiguous discrimination of the relative phases between consecutive signal states emitted by the source. We show that this attack can provide tighter upper bounds for the security of a DPS QKD scheme than those derived from sequential attacks where the eavesdropper aims to identify the state of each signal emitted by the source unambiguously.

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