Results 101 to 110 of about 96,212 (277)

On The Harmonic Oscillator Group [PDF]

open access: yes, 2011
We discuss the maximum kinematical invariance group of the quantum harmonic oscillator from a view point of the Ermakov-type system. A six parameter family of the square integrable oscillator wave functions, which seems cannot be obtained by the standard
Lopez, Raquel M.   +2 more
core  

Quantum Dynamics of a Few-Photon Parametric Oscillator

open access: yesPhysical Review X, 2019
Modulating the frequency of a harmonic oscillator at nearly twice its natural frequency leads to amplification and self-oscillation. Above the oscillation threshold and in the presence of a nonlinearity, the field settles into a coherent oscillating ...
Zhaoyou Wang   +6 more
doaj   +1 more source

The Fourier Transform on Quantum Euclidean Space

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2011
We study Fourier theory on quantum Euclidean space. A modified version of the general definition of the Fourier transform on a quantum space is used and its inverse is constructed.
Kevin Coulembier
doaj   +1 more source

Synthesis, Structures, and Properties of Dehydrobiphenyleno[12]Annulenes: Carbon‐Rich Compounds Comprising Two Different Antiaromatic Units

open access: yesChemistry – An Asian Journal, EarlyView.
Carbon‐rich compounds dehydrobiphenyleno[12]annulenes (DBP[12]As) comprising antiaromatic four‐membered rings (4MR) and 12‐membered ring (12MR) were synthesized and characterized. DBP[12]As feature high HOMO energy levels and narrow HOMO‐LUMO gaps. The 4MRs have stronger antiaromatic character than the 12MR in DBP[12]As. Abstract In this work we report
Komari Suzuki   +7 more
wiley   +1 more source

Compressibility Function and Speed of Sound in the Non‐Commutative Quantum Hadrodynamics Type‐I Model for Neutron Stars

open access: yesAstronomische Nachrichten, EarlyView.
ABSTRACT We investigate the effects of a minimal measurable length on neutron stars, within the quantum hadrodynamics (QHD‐I) model modified by the Generalized Uncertainty Principle (GUP). Working in a deformed Poisson algebra framework, we incorporate GUP effects via a time‐invariant transformation of the phase space volume, effectively reducing the ...
João Gabriel Galli Gimenez   +2 more
wiley   +1 more source

An entropy production based method for determining the position diffusion's coefficient of a quantum Brownian motion

open access: yes, 2018
Quantum Brownian motion of a harmonic oscillator in the Markovian approximation is described by the respective Caldeira-Leggett master equation. This master equation can be brought into Lindblad form by adding a position diffusion term to it.
Bernád, J. Z., Csirik, M. A., Homa, G.
core   +1 more source

Iridium‐Doped Monoclinic Zirconia as a Catalyst for the Oxygen Evolution Reaction

open access: yesChemCatChem, EarlyView.
Using density functional theory, we study Ir‐dopings of the monoclinic ZrO2${\rm ZrO}_2$ (1¯11$\bar{1}11$) surface in search of an Ir‐lean catalyst for the oxygen evolution reaction. These are found to be metastable compared to the separate phases of IrO2${\rm IrO}_2$ and ZrO2${\rm ZrO}_2$.
Mathias Stokkebye Nissen   +1 more
wiley   +1 more source

Homological quantum mechanics

open access: yesJournal of High Energy Physics
We provide a formulation of quantum mechanics based on the cohomology of the Batalin-Vilkovisky (BV) algebra. Focusing on quantum-mechanical systems without gauge symmetry we introduce a homotopy retract from the chain complex of the harmonic oscillator ...
Christoph Chiaffrino   +2 more
doaj   +1 more source

Nonequilibrium quantum fluctuation relations for harmonic systems in nonthermal environments

open access: yesNew Journal of Physics, 2013
We formulate exact generalized nonequilibrium fluctuation relations for the quantum mechanical harmonic oscillator coupled to multiple harmonic baths. Each of the different baths is prepared in its own individual (in general nonthermal) state.
D Pagel   +4 more
doaj   +1 more source

Conformal Transformation of the Schr\"{o}dinger Equation for the Harmonic Oscillator into a Simpler Form [PDF]

open access: yes, 2010
The Schr\"{o}dinger equation and ladder operators for the harmonic oscillator are shown to simplify through the use of an isometric conformal transformation. These results are discussed in relation to the Bargmann representation.
Ducharme, Robert J.
core  

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