Stochastic Matrix Product States

Author(s): K. Temme, F. Verstraete

Journal: Physical Review Letters

Volume: 104

Page(s): 210502

Year: 2010

DOI Number: 10.1103/PhysRevLett.104.210502

Link: Link to publication


The concept of stochastic matrix product states is introduced and a natural form for the states is derived. This allows to define the analogue of Schmidt coefficients for steady states of non-equilibrium stochastic processes. We discuss a new measure for correlations which is analogous to the entanglement entropy, the entropy cost $S_C$, and show that this measure quantifies the bond dimension needed to represent a steady state as a matrix product state. We illustrate these concepts on the hand of the asymmetric exclusion process.


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