Results 81 to 90 of about 1,025,362 (165)
Extension of the Morris-Shore transformation to multilevel ladders
, 2010 We describe situations in which chains of N degenerate quantum energy levels, coupled by time-dependent external fields, can be replaced by independent sets of chains of length N, N-1,...,2 and sets of uncoupled single states.
A. A. Rangelov +7 more
core +1 more source
Magnetoelectronic states of a monolayer graphite [PDF]
arXiv, 2007 The Peierl's tight-binding model, with the band Hamiltonian matrix, is used to calculate the magnetoelectronic structure of a monolayergraphite. There are many flat Landau levels and some oscillatory Landau levels. The low Landau-level energies are characterized by a simple relation, not for others.
arxiv
Multiscale dynamics of open three-level quantum systems with two quasi-degenerate levels [PDF]
J. Phys. A: Math. Theor. 48, 275304 (2015), 2014 We consider a three-level quantum system interacting with a bosonic thermal reservoir. Two energy levels of the system are nearly degenerate but well separated from the third one. The system-reservoir interaction constant is larger than the energy difference of the degenerate levels, but it is smaller than the separation between the latter and the ...
arxiv
Spin- and valley-dependent magneto-optical properties of MoS2
, 2013 We investigate the behavior of low-energy electrons in two-dimensional molybdenum disulfide when submitted to an external magnetic field. Highly degenerate Landau levels form in the material, between which light-induced excitations are possible.
Goerbig, M. O. +2 more
core +1 more source
Astrocyte remodeling without gliosis precedes optic nerve axonopathy
Acta Neuropathologica Communications, 2018 Astroyctes serve myriad functions but are especially critical in white matter tracts, where energy-demanding axons propagate action potentials great distances between neurons.
Melissa L. Cooper +2 more
doaj +1 more source
BMC Genomics, 2012 Background In Bacillus subtilis and its relatives carbon catabolite control, a mechanism enabling to reach maximal efficiency of carbon and energy sources metabolism, is achieved by the global regulator CcpA (carbon catabolite protein A).
Marciniak Bogumiła C +6 more
doaj +1 more source
Atomic-like behaviors and orbital-related Luttinger liquid in carbon nano-peapod quantum dots [PDF]
Dans European Nano Systems Worshop - ENS 2005, Paris : France
(2005), 2007 We report influence of encapsulated C60 molecules on electron transport in carbon-nanotube peapod quantum dots. We find atomic-like behaviors with doubly degenerate electronic levels, which exist only around ground states, by single electron spectroscopy measured at low back-gate voltages (Vbg). Correlation with presence of nearly free electrons (NFEs)
arxiv
Thermal shift of the resonance between an electron gas and quantum dots: what is the origin?
New Journal of Physics, 2016 The operation of quantum dots (QDs) at highest possible temperatures is desirable for many applications. Capacitance–voltage spectroscopy ( C ( V )-spectroscopy) measurements are an established instrument to analyse the electronic structure and energy ...
Fabian Brinks +2 more
doaj +1 more source
Physical Review X, 2011 Chern insulators are band insulators exhibiting a nonzero Hall conductance but preserving the lattice translational symmetry. We conclusively show that a partially filled Chern insulator at 1/3 filling exhibits a fractional quantum Hall effect and rule ...
N. Regnault, B. Andrei Bernevig
doaj +1 more source
Quantum Invariants of the Pairing Hamiltonian [PDF]
arXiv, 2008 Quantum invariants of the orbit dependent pairing problem are identified in the limit where the orbits become degenerate. These quantum invariants are simultaneously diagonalized with the help of the Bethe ansatz method and a symmetry in their spectra relating the eigenvalues corresponding to different number of pairs is discussed.
arxiv