Results 1 to 10 of about 1,046,576 (324)

Quantum coherence-control of thermal energy transport: the V model as a case study

open access: yesNew Journal of Physics, 2022
Whether genuine quantum effects, particularly quantum coherences, can offer an advantage to quantum devices is a topic of much interest. Here, we study a minimal model, the three-level V system coupled to two heat baths, and investigate the role of ...
Felix Ivander   +2 more
doaj   +1 more source

Ground State and Quasiparticle Spectrum of a Two Component Bose-Einstein Condensate

open access: yes, 2001
We consider a dilute atomic Bose-Einstein condensate with two non-degenerate internal energy levels. The presence of an external radiation field can result in new ground states for the condensate which result from the lowering of the condensate energy ...
A. G. Rojo   +20 more
core   +1 more source

Higher-order corrections of the hydrogen-like atoms: the effect of Darwin term

open access: yesArab Journal of Basic and Applied Sciences
The article extensively explores higher-order corrections of the time-independent non-degenerate perturbation theory, providing a thorough analysis of its fundamental principles.
Mahmood Jwailes   +2 more
doaj   +1 more source

Ultrafast carrier dynamics in Landau-quantized graphene

open access: yesNanophotonics, 2015
In an external magnetic field, the energy of massless charge carriers in graphene is quantized into non-equidistant degenerate Landau levels including a zero-energy level.
Wendler Florian   +2 more
doaj   +1 more source

Topologically Protected Zero Modes in Twisted Bilayer Graphene

open access: yes, 2011
We show that the twisted graphene bilayer can reveal unusual topological properties at low energies, as a consequence of a Dirac-point splitting. These features rely on a symmetry analysis of the electron hopping between the two layers of graphene and we
de Gail, R.   +4 more
core   +1 more source

Exact vortex nucleation and cooperative vortex tunneling in dilute BECs [PDF]

open access: yes, 2008
With the imminent advent of mesoscopic rotating BECs in the lowest Landau level (LLL) regime, we explore LLL vortex nucleation. An exact many-body analysis is presented in a weakly elliptical trap for up to 400 particles. Striking non-mean field features
A. Bourne   +5 more
core   +1 more source

Cu$_2$O Microcrystals Grown on Silicon as Platform for Quantum-Degenerate Excitons and Rydberg States [PDF]

open access: yes, 2019
Cuprous oxide (Cu$_2$O) is a semiconductor with large exciton binding energy and significant technological importance in applications such as photovoltaics and solar water splitting.
S. Steinhauer   +4 more
semanticscholar   +1 more source

Variational wave functions of a vortex in cyclotron motion

open access: yes, 2000
In two dimensions the microscopic theory, which provides a basis for the naive analogy between a quantized vortex in a superfluid and an electron in an uniform magnetic field, is presented.
JIAN-MING TANG, Peierls R. E.
core   +2 more sources

Complete controllability of quantum systems [PDF]

open access: yes, 2001
Sufficient conditions for complete controllability of $N$-level quantum systems subject to a single control pulse that addresses multiple allowed transitions concurrently are established.
A. I. Solomon   +17 more
core   +2 more sources

History and Some Aspects of the Lamb Shift

open access: yesPhysics, 2020
Radiation is a process common to classical and quantum systems with very different effects in each regime. In a quantum system, the interaction of a bound electron with its own radiation field leads to complex shifts in the energy levels of the electron,
G. Jordan Maclay
doaj   +1 more source

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