PT Journal
AU Hinarejos, M
   Bañuls, MC
   Perez, A
TI A Study of Wigner Functions for Discrete-Time Quantum Walks
SO Journal of Computational and Theoretical Nanoscience
JI J. Comput. Theor. Nanosci.
PY 2013
BP 1626
EP 1633
VL 10
IS 7
DI 10.1166/jctn.2013.3101
LA English
DE Quantum Walk; Wigner Function; Negativity
AB We perform a systematic study of the discrete time Quantum Walk on one dimension using Wigner functions, which are generalized to include the chirality (or coin) degree of freedom. In particular, we analyze the evolution of the negative volume in phase space, as a function of time, for different initial states. This negativity can be used to quantify the degree of departure of the system from a classical state. We also relate this quantity to the entanglement between the coin and walker subspaces.
ER