Results 1 to 10 of about 26 (26)

Dynamical decoupling sequences for multi-qubit dephasing suppression and long-time quantum memory

New Journal of Physics, 2016
We consider a class of multi-qubit dephasing models that combine classical noise sources and linear coupling to a bosonic environment, and are controlled by arbitrary sequences of dynamical decoupling pulses.
Gerardo A Paz-Silva, Seung-Woo Lee, Todd J Green, Lorenza Viola   +3 more
doaj   +1 more source

Exact solvability, non-integrability, and genuine multipartite entanglement dynamics of the Dicke model

New Journal of Physics, 2015
In this paper, the finite-size Dicke model of arbitrary number of qubits is solved analytically in a unified way within extended coherent states. For the $N=2k$ or $2k-1$ Dicke models ( k is an integer), the G -function, which is only an energy dependent
Shu He, Liwei Duan, Qing-Hu Chen
doaj   +1 more source

Lefschetz-thimble analysis of the sign problem in one-site fermion model

New Journal of Physics, 2016
The Lefschetz-thimble approach to path integrals is applied to a one-site model of electrons, i.e., the one-site Hubbard model. Since the one-site Hubbard model shows a non-analytic behavior at the zero temperature and its path integral expression has ...
Yuya Tanizaki, Yoshimasa Hidaka, Tomoya Hayata   +2 more
doaj   +1 more source

Hamiltonian quantum simulation with bounded-strength controls

New Journal of Physics, 2014
We propose dynamical control schemes for Hamiltonian simulation in many-body quantum systems that avoid instantaneous control operations and rely solely on realistic bounded-strength control Hamiltonians .
Adam D Bookatz, Pawel Wocjan, Lorenza Viola   +2 more
doaj   +1 more source

Nonequilibrium quantum phase transitions in the XY model: comparison of unitary time evolution and reduced density operator approaches

New Journal of Physics, 2014
We study nonequilibrium quantum phase transitions in the XY spin 1/2 chain using the ${{C}^{*}}$ algebra. We show that the well-known quantum phase transition at a magnetic field of h = 1 also persists in the nonequilibrium setting as long as one of the ...
Shigeru Ajisaka, Felipe Barra, Bojan Žunkovič   +2 more
doaj   +1 more source

Invariant-Parameterized Exact Evolution Operator for SU(2) Systems with Time-Dependent Hamiltonian. [PDF]

Entropy (Basel), 2023
Nakazato H, Sergi A, Migliore A, Messina A.   +3 more
europepmc   +1 more source

Algebraical Entropy and Arrow of Time. [PDF]

Entropy (Basel), 2022
Gogberashvili M.
europepmc   +1 more source

Semi-Classical Discretization and Long-Time Evolution of Variable Spin Systems. [PDF]

Entropy (Basel), 2021
Morales-Hernández GE, Castellanos JC, Romero JL, Klimov AB.   +3 more
europepmc   +1 more source

Rényi Entropies of Multidimensional Oscillator and Hydrogenic Systems with Applications to Highly Excited Rydberg States. [PDF]

Entropy (Basel), 2022
Dehesa JS.
europepmc   +1 more source

Self-Compassion in Chinese Young Adults: Its Measurement and Measurement Construct. [PDF]

Assessment, 2023
Zhao M, Ford T, Smithson J, Wang P, Karl A.   +4 more
europepmc   +1 more source