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quant-ph2000
Strong Converse for Identification via Quantum Channels
R. Ahlswede, A. Winter
In this paper we present a simple proof of the strong converse for identification via discrete memoryless quantum channels, based on a novel covering lemma. The new method is a gen…
quant-ph2000
On the reversible extraction of classical information from a quantum source
Howard Barnum, Patrick Hayden, Richard Jozsa +1
Consider a source E of pure quantum states with von Neumann entropy S. By the quantum source coding theorem, arbitrarily long strings of signals may be encoded asymptotically into…
quant-ph2000
Quantum Finite State Transducers
R. Freivalds, A. Winter
We introduce quantum finite state transducers (qfst), and study the class of relations which they compute. It turns out that they share many features with probabilistic finite stat…