Journal
PRX QUANTUM
Volume 2, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PRXQuantum.2.030201
Keywords
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Funding
- European Union [801110]
- Austrian Federal Ministry of Education, Science and Research (BMBWF)
- Australian Research Council Future Fellowship [FT160100073]
- Marie Curie Actions (MSCA) [801110] Funding Source: Marie Curie Actions (MSCA)
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Classical stochastic processes are well studied in various fields, while quantum stochastic processes have been a topic of fierce debate due to pathological issues. Recent developments have addressed these issues and paved the way for generalizing classical stochastic processes theory to the quantum domain. This tutorial outlines the structure of quantum stochastic processes using the modern language of quantum combs, aimed at students in quantum physics and quantum-information theory.
The field of classical stochastic processes forms a major branch of mathematics. Stochastic processes are, of course, also very well studied in biology, chemistry, ecology, geology, finance, physics, and many more fields of natural and social sciences. When it comes to quantum stochastic processes, however, the topic is plagued with pathological issues that have led to fierce debates amongst researchers. Recent developments have begun to untangle these issues and paved the way for generalizing the theory of classical stochastic processes to the quantum domain without ambiguities. This tutorial details the structure of quantum stochastic processes, in terms of the modern language of quantum combs, and is aimed at students in quantum physics and quantum-information theory. We begin with the basics of classical stochastic processes and generalize the same ideas to the quantum domain. Along the way, we discuss the subtle structure of quantum physics that has led to troubles in forming an overarching theory for quantum stochastic processes. We close the tutorial by laying out many exciting problems that lie ahead in this branch of science.
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