Results 71 to 80 of about 17,102 (215)
Picosecond Stabilization of Transferred Charge Carriers at Plasmonic Metal–Molecule Interfaces
Angewandte Chemie International Edition, Volume 65, Issue 1, 2 January 2026.Charge and heat transfer processes between plasmonic nanoparticles and adsorbed moleculal monolayers are observed using ultrafast infrared spectrocopy. Analysis of free carrier absorption and vibrational signals indicates that overflowing charge carriers are stabilized, extending their lifetime to several picoseconds.
Daniel Sandner +6 more
wiley +1 more source
Hypercontractivity for anharmonic oscillators
Journal of Functional Analysis, 1974 AbstractFor suitable V(x) the operator −Δ + V(x) on L2(Rn,dx) is equivalent to the Dirichlet form (grad ·, grad ·)H on H = L2(Rn,w2dx) where w is the ground state wavefunction of −Δ + V. The operator associated with this form is shown to be the generator of a hypercontractive semigroup on the spaces Lp(Rn,w2dx).
Eckmann, J.-P., Pearson, D.
openaire +2 more sources
Advanced Optical Materials, Volume 14, Issue 3, 19 January 2026.This perspective explores how intrinsic confinement effects in metavalent chalcogenide and pnictogen thin films alter optical and vibrational properties. By comparing thickness‐dependent effects across prototypical systems, this work highlights the role of unconventional bonding in shaping coherent phonon dynamics and dielectric functions, offering new
Felix Hoff, Matthias Wuttig
wiley +1 more source
Pauli-Villars Regularization in nonperturbative Hamiltonian approach on the Light Front
, 2015 The advantage of Pauli-Villars regularization in quantum field theory quantized on the light front is explained. Simple examples of scalar $\lambda\varphi^4$ field theory and Yukawa-type model are used.
Franke, V. A. +4 more
core +1 more source
Optically Driven Formation of Tailored Phonon Cavities
Advanced Science, Volume 13, Issue 4, 19 January 2026.It is demonstrated that a structured optical field creates nanoscale “phonon cavities” in van der Waals materials, where atomic vibrations are confined and controlled in space and time. This approach enables programmable control of cavity geometry, symmetry, and frequency, and provides a platform for ultrafast studies of nonequilibrium interactions and
Jianyu Wu +5 more
wiley +1 more source
Open Engineering, 2020 The variational method is known as a powerful and preferred technique to find both analytical and numerical solutions for numerous forms of anharmonic oscillator potentials.
Maiz Fethi
doaj +1 more source
Quantum Jumps in Amplitude Bistability: Tracking a Coherent and Invertible State Localization
Annalen der Physik, Volume 538, Issue 1, January 2026.A notable asymmetry is shown to characterize the bistable switching between macroscopic metastable states of light in the strong‐coupling limit of radiation–matter interaction. Transitions from the vacuum to a highly excited state correlate with a highly bunched sequence of emitted photons, while a downward switch to the vacuum involves a coherent ...
Th. K. Mavrogordatos
wiley +1 more source
Multi-phonon relaxation and generation of quantum states in a nonlinear mechanical oscillator
New Journal of Physics, 2013 The dissipative quantum dynamics of an anharmonic oscillator is investigated theoretically in the context of carbon-based nano-mechanical systems. In the short-time limit, it is known that macroscopic superposition states appear for such oscillators.
A Voje, A Croy, A Isacsson
doaj +1 more source
Convergent Perturbation Theory for a q-deformed Anharmonic Oscillator
, 1998 A $q$--deformed anharmonic oscillator is defined within the framework of $q$--deformed quantum mechanics. It is shown that the Rayleigh--Schr\"odinger perturbation series for the bounded spectrum converges to exact eigenstates and eigenvalues, for $q ...
Dick, Rainer +3 more
core +2 more sources
Time‐Domain Visualization of Electron‐Phonon Coupling in Nanographenes
Small Methods, Volume 10, Issue 2, 22 January 2026.Impulsive vibrational spectroscopy, Raman spectroscopy, and density functional theory calculations are gathered together to unveil elusive low‐frequency collective vibrational modes in dibenzo[hi,st]ovalene nanographenes, enabling the detailed comparison between vibrational modes in derivatives with different peripheral groups.
Rafael Muñoz‐Mármol +13 more
wiley +1 more source