Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Lang, Haifeng"'
Autor:
Lang, Haifeng, Hauke, Philipp
Nonadiabatic quantum-classical mapping approaches have significantly gained in popularity in the past several decades because they have acceptable accuracy while remaining numerically tractable even for large system sizes. In the recent few years, se
Externí odkaz:
http://arxiv.org/abs/2410.01640
Autor:
Lang, Haifeng, Sato, Takeshi
Five time-dependent orbital optimized coupled-cluster (TD-ooCC) methods, of which four can converge to the complete active space self-consistent-field method, are presented for fermion-mixtures with arbitrary fermion kinds and numbers. Truncation sch
Externí odkaz:
http://arxiv.org/abs/2407.04275
Publikováno v:
Phys. Rev. B 106, 174305 (2022)
Disorder-free localization in translation-invariant gauge theories presents a counterintuitive yet powerful framework of ergodicity breaking in quantum many-body physics. The fragility of this phenomenon in the presence of gauge-breaking errors has r
Externí odkaz:
http://arxiv.org/abs/2203.01338
Publikováno v:
New J. Phys. 24 033015 (2022)
Protection of gauge invariance in experimental realizations of lattice gauge theories based on energy-penalty schemes has recently stimulated impressive efforts both theoretically and in setups of quantum synthetic matter. A major challenge is the re
Externí odkaz:
http://arxiv.org/abs/2106.09032
Publikováno v:
Phys. Rev. B 107, 035153 (2023)
Although gauge invariance is a postulate in fundamental theories of nature such as quantum electrodynamics, in quantum-simulation implementations of gauge theories it is compromised by experimental imperfections. In a recent work [Halimeh and Hauke,
Externí odkaz:
http://arxiv.org/abs/2104.07040
Nonadiabatic molecular dynamics occur in a wide range of chemical reactions and femtochemistry experiments involving electronically excited states. These dynamics are hard to treat numerically as the system's complexity increases and it is thus desir
Externí odkaz:
http://arxiv.org/abs/2104.07139
Publikováno v:
PRX Quantum 2, 040311 (2021)
Quantum-simulator hardware promises new insights into problems from particle and nuclear physics. A major challenge is to reproduce gauge invariance, as violations of this quintessential property of lattice gauge theories can have dramatic consequenc
Externí odkaz:
http://arxiv.org/abs/2007.00668
Publikováno v:
Phys. Rev. B 98, 134310 (2018)
Based on a kinematic approach in defining a geometric phase for a density matrix, we define the generalized Loschmidt overlap amplitude (GLOA) for an open system for arbitrary quantum evolution. The GLOA reduces to the Loschmidt overlap amplitude (LO
Externí odkaz:
http://arxiv.org/abs/1802.09890
Publikováno v:
Physics Letters A (2020), 126333
We investigate the diagonal entropy(DE) of the ground state for quantum many-body systems, including the XY model and the Ising model with next nearest neighbour interactions. We focus on the DE of a subsystem of L continuous spins. We show that the
Externí odkaz:
http://arxiv.org/abs/1802.08475
We have theoretically investigated the intrinsic carrier mobility in semimetals with distorted Dirac cones under both longitudinal and transverse acoustic phonon scattering. An analytic formula for the carrier mobility was obtained. It shows that til
Externí odkaz:
http://arxiv.org/abs/1704.08408