Open Quantum Random Walks and Quantum Markov chains on Trees I: Phase transitions

Abstract

In the present paper, we construct QMC (Quantum Markov Chains) associated with Open Quantum Random Walks such that the transition operator of the chain is defined by OQRW and the restriction of QMC to the commutative subalgebra coincides with the distribution $P_{\rho }$ of OQRW. However, we are going to look at the probability distribution as a Markov field over the Cayley tree. Such kind of consideration allows us to investigated phase transition phenomena associated for OQRW within QMC scheme. Furthermore, we first propose a new construction of QMC on trees, which is an extension of QMC considered in Ref. [10]. Using such a construction, we are able to construct QMCs on tress associated with OQRW. Our investigation leads to the detection of the phase transition phenomena within the proposed scheme. This kind of phenomena appears first time in this direction. Moreover, mean entropies of QMCs are calculated.

17 pages, Open Systems & Information Dynamics (accepted)

References in corpus (5)

• Exploring Topological Phases With Quantum Walks
• Quantum phase transition using quantum walks in an optical lattice
• The Generalized Lyapunov Theorem and its Application to Quantum Channels
• Diagonalizability of non homogeneous quantum Markov states and associated von Neumann algebras
• Quantum Markov States on Cayley trees