Entropy rate of message sources driven by quantum walks
نویسندگان
چکیده
منابع مشابه
Quantum Walks driven by many coins
Abstract Quantum random walks have been much studied recently, largely due to their highly nonclassical behavior. In this paper, we study one possible route to classical behavior for the discrete quantum random walk on the line: the use of multiple quantum “coins” in order to diminish the effects of interference between paths. We find solutions to this system in terms of the single coin random ...
متن کاملDriven quantum walks.
We introduce the concept of a driven quantum walk. This work is motivated by recent theoretical and experimental progress that combines quantum walks and parametric down-conversion, leading to fundamentally different phenomena. We compare these striking differences by relating the driven quantum walks to the original quantum walk. Next, we illustrate typical dynamics of such systems and show th...
متن کاملDecoherent quantum walks driven by a generic coin operation
We consider the effect of different unitary noise mechanisms on the evolution of a quantum walk (QW) on a linear chain with a generic coin operation: (i) bit-flip channel noise, restricted to the coin subspace of the QW, and (ii) topological noise caused by randomly broken links in the linear chain. Similarities and differences in the respective decoherent dynamics of the walker as a function o...
متن کاملEntropy-Rate Driven Inference of Stochastic Grammars
A new method for inferring specific stochastic grammars is presented. The process called Hybrid Model Learner (HML) applies entropy rate to guide the agglomeration process of type ab->c. Each rule derived from the input sequence is associated with a certain entropy-rate difference. A grammar automatically inferred from an example sequence can be used to detect and recognize similar structures i...
متن کاملQuantum dynamical entropy and decoherence rate
We investigate quantum dynamical systems defined on a finite-dimensional Hilbert space and subjected to an interaction with an environment. The rate of decoherence of initially pure states, measured by the increase of their von Neumann entropy, averaged over an ensemble of random pure states, is proved to be bounded from above by the partial entropy used to define the ALF-dynamical entropy. The...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review A
سال: 2014
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.89.022338