Results 31 to 40 of about 18,863 (278)

Appearance of branched motifs in the spectra of BCN type Polychronakos spin chains

open access: yesNuclear Physics B, 2020
As is well known, energy levels appearing in the highly degenerate spectra of the AN−1 type of Haldane-Shastry and Polychronakos spin chains can be classified through the motifs, which are characterized by some sequences of the binary digits like ‘0’ and
Bireswar Basu-Mallick, Madhurima Sinha
doaj   +1 more source

Spin and valley degrees of freedom in a bilayer graphene quantum point contact: Zeeman splitting and interaction effects

open access: yesPhysical Review Research, 2022
We present a study on the lifting of degeneracy of the size-quantized energy levels in an electrostatically defined quantum point contact in bilayer graphene by the application of in-plane magnetic fields.
Vanessa Gall   +3 more
doaj   +1 more source

Features of third-order optical nonlinearity in carbon disulfide

open access: yesSemiconductor Physics, Quantum Electronics & Optoelectronics, 2019
Degenerate four-wave mixing (DFWM) processes in carbon disulfide have been experimentally studied applying the wavelength dependent femtosecond laser source. The quantum mechanical perturbation theory was applied to analyze the experimental data.
L.V. Poperenko
doaj   +1 more source

Surface-Related States in Oxidized Silicon Nanocrystals Enhance Carrier Relaxation and Inhibit Auger Recombination

open access: yesNanoscale Research Letters, 2008
We have studied ultrafast carrier dynamics in oxidized silicon nanocrystals (NCs) and the role that surface-related states play in the various relaxation mechanisms over a broad range of photon excitation energy corresponding to energy levels below and ...
Nassiopoulou AG   +2 more
doaj   +1 more source

Integral equation for numerical solution of stationary quantum-mechanical problems

open access: yesAdvanced Engineering Research, 2016
The work objective is to describe the numerical solution method for the stationary Schrödinger equation based on the application of the integral equation identical to the Schrödinger equation.
Sergey Yu. Knyazev
doaj   +1 more source

Motivations for using the item response theory nominal response model to rank responses to multiple-choice items

open access: yesPhysical Review Physics Education Research, 2022
Several recent studies have employed item response theory (IRT) to rank incorrect responses to commonly used research-based multiple-choice assessments. These studies use Bock’s nominal response model (NRM) for applying IRT to categorical (nondichotomous)
Trevor I. Smith, Nasrine Bendjilali
doaj   +1 more source

Effects of spin–orbit coupling and many-body correlations in STM transport through copper phthalocyanine

open access: yesBeilstein Journal of Nanotechnology, 2015
The interplay of exchange correlations and spin–orbit interaction (SOI) on the many-body spectrum of a copper phtalocyanine (CuPc) molecule and their signatures in transport are investigated.
Benjamin Siegert   +2 more
doaj   +1 more source

Mapping the evolution of mitochondrial complex I through structural variation

open access: yesFEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin   +2 more
wiley   +1 more source

Electronic properties and optical absorption of rectangular β12-borophene quantum dot

open access: yesAIP Advances
Using the tight-binding model, we studied the electronic and optical properties of rectangular β12-borophene quantum dot (RBQD). We considered the effects of different lengths and widths on the energy levels and optical spectra of RBQD.
Feixia Liang   +4 more
doaj   +1 more source

Universal Nonadiabatic Control of Small-Gap Superconducting Qubits

open access: yesPhysical Review X, 2020
Resonant transverse driving of a two-level system as viewed in the rotating frame couples two degenerate states at the Rabi frequency, an equivalence that emerges in quantum mechanics.
Daniel L. Campbell   +10 more
doaj   +1 more source

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