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【北京大学物理化学讲座】The route going from transition path time distributions and protein folding times, to quantum mechanics, tunneling times and nonadiabatic transition times（图）
route going transition path time distributions quantum mechanics
2023/6/19
【北京大学物理化学讲座】The route going from transition path time distributions and protein folding times, to quantum mechanics, tunneling times and nonadiabatic transition times
Modern computers contain tens of billions of switches, called transistors, that pass electrical signals to process inputs and outputs—serving as the basis for computation.
Zooming and Tunneling in Tioga: Supporting Navigation in Multidimensional Space
Zooming Tunneling Tioga Supporting Navigation Multidimensional Space
2016/5/24
In [7] we proposed a visual programming system called Tioga. The Tioga system applies a boxes and arrows programming notation to allow nonexpert users to graphically construct database applications. U...
Landau-Zener tunneling of Bose-Einstein condensates in an optical lattice
Condensate asymmetric tunnel deep optical lattice linear coupled nonlinear schrodinger equation
2014/12/29
A theory of the nonsymmetric Landau-Zener tunneling of Bose-Einstein condensates in deep optical lattices is presented. It is shown that periodic exchange of matter between the bands is described by a...
Hole digging in ensembles of tunneling molecular magnets
Quantum tunneling magnetic molecules monte carlo simulation tunnel lorentz line shape crystal
2014/12/20
The nuclear spin-mediated quantum relaxation of ensembles of tunneling magnetic molecules causes a “hole” to appear in the distribution of internal fields in the system. The form of this hole and its ...
Reply to “Comment on ‘Hole digging in ensembles of tunneling molecular magnets’ ”
Bias magnetization the molecular rotation the monte carlo simulation magnetization relaxation lattice
2014/12/20
Our work has argued for a particular scaling form governing the distribution M(ξ,t) of magnetization over bias ξ, for a system of dipolar-interacting molecular spins. This form, which was found in Mon...
Optimal tunneling enhances the quantum photovoltaic effect in double quantum dots
electronic transport in mesoscopic systems photoconduction and photovoltaic effect quantum dots quantum description of interaction of light and matter
2014/9/24
We investigate the quantum photovoltaic effect in double quantum dots by applying the nonequilibrium quantum master equation. A drastic suppression of the photovoltaic current is observed near the ope...
Under-the-barrier dynamics in laser-induced relativistic tunneling
Under-the-barrier dynamics laser-induced relativistic tunneling Atomic Physics
2012/5/29
The tunneling dynamics in relativistic strong-field ionization is investigated with the aim to develop an intuitive picture for the relativistic tunneling regime. We demonstrate that the tunneling pic...
Tunneling and Metastability of continuous time Markov chains II, the nonreversible case
Metastability Tunneling Markov processes
2012/5/25
We proposed in \cite{bl2} a new approach to prove the metastable behavior of reversible dynamics based on potential theory and local ergodicity. In this article we extend this theory to nonreversible ...
Coexistance of giant tunneling electroresistance and magnetoresistance in an all-oxide magnetic tunnel junction
Coexistance giant tunneling electroresistance magnetoresistance all-oxide magnetic tunnel junction
2012/2/24
We demonstrate with first-principles electron transport calculations that large tunneling magnetoresistance (TMR) and tunneling electroresistance (TER) effects can coexist in an all-oxide device. The ...
Simulation of spin-polarized scanning tunneling microscopy on complex magnetic surfaces: The case of a Cr monolayer on Ag(111)
spin-polarized scanning tunneling complex magnetic surfaces Cr monolayer Ag
2011/8/17
Abstract: We propose an atom-superposition-based method for simulating spin-polarized scanning tunneling microscopy (SP-STM) from first principles. Our approach provides bias dependent STM images in h...
Electromagnetic tunneling of obliquely-incident waves through a single-negative slab paired with a double-positive uniaxial slab
single-negative slab double-positive uniaxial slab
2011/9/2
We show that, under appropriate oblique-incidence and polarization conditions, the inherent opaqueness of a homogeneous, isotropic single-negative slab may be perfectly compensated (in the ideal lossl...
The Quillen metric, analytic torsion and tunneling for high powers of a holomorphic line bundle
Holomorphic line bundle determinant bundle analytic torsion supersymmetry quantum mechanics
2011/7/28
Let L be a line bundle over a compact complex manifold X (possibly non-Kahler) and denote by h_{L} and h_{X} fixed Hermitian metrics on L and TX, respectively. We generalize the asymptotics for the in...
Chiral tunneling in single and bilayer graphene
Chiral tunneling single-layer bilayer graphene its semiclassical theory
2011/7/28
Abstract: We review chiral (Klein) tunneling in single-layer and bilayer graphene and present its semiclassical theory, including the Berry phase and the Maslov index. Peculiarities of the chiral tunn...
Resonantly Enhanced Tunneling and Transport of Ultracold Atoms on Tilted Optical Lattices
Tunneling Ultracold Atoms Tilted Optical Lattices
2011/9/9
We investigate the resonantly enhanced tunneling dynamics of ultracold bosons loaded on a tilted 1-D optical lattice, which can be used to simulate a chain of Ising spins and associated quantum phase ...