TY - JOUR
T1 - Quantum quasi-Zeno dynamics
T2 - Transitions mediated by frequent projective measurements near the Zeno regime
AU - Elliott, T. J.
AU - Vedral, V.
PY - 2016/7/27
Y1 - 2016/7/27
N2 - Frequent observation of a quantum system leads to quantum Zeno physics, where the system evolution is constrained to states commensurate with the measurement outcome. We show that, more generally, the system can evolve between such states through higher-order virtual processes that pass through states outside the measurement subspace. We derive effective Hamiltonians to describe this evolution, and the dependence on the time between measurements. We demonstrate application of this phenomena to prototypical quantum many-body system examples, spin chains and atoms in optical lattices, where it facilitates correlated dynamical effects.
AB - Frequent observation of a quantum system leads to quantum Zeno physics, where the system evolution is constrained to states commensurate with the measurement outcome. We show that, more generally, the system can evolve between such states through higher-order virtual processes that pass through states outside the measurement subspace. We derive effective Hamiltonians to describe this evolution, and the dependence on the time between measurements. We demonstrate application of this phenomena to prototypical quantum many-body system examples, spin chains and atoms in optical lattices, where it facilitates correlated dynamical effects.
U2 - 10.1103/physreva.94.012118
DO - 10.1103/physreva.94.012118
M3 - Article
SN - 1050-2947
VL - 94
JO - Physical Review A: Atomic, Molecular, and Optical Physics
JF - Physical Review A: Atomic, Molecular, and Optical Physics
IS - 1
M1 - 012118
ER -