Results 1 to 10 of about 65,835 (179)
Collective excitations of a bound-in-the-continuum condensate [PDF]
Nature Communications, 2023 Spectra of low-lying elementary excitations are critical to characterize properties of bosonic quantum fluids. Usually these spectra are difficult to observe, due to low occupation of non-condensate states compared to the ground state.
Anna Grudinina +10 more
doaj +2 more sources
Collective excitations in Quantum Dot [PDF]
Physica E: Low-dimensional Systems and Nanostructures, 1999 We investigate different types of collective excitations in a quantum dot containing finite number of electrons at zero magnetic field. To estimate the excitation energies analytically we follow the energy weighted sum-rule approach. We consider the most
B. Mast +25 more
core +2 more sources
Collective Excitations of Supersymmetric Plasma [PDF]
Physical Review D, 2011 Collective excitations of N = 1 supersymmetric electromagnetic plasma are studied. Since the Keldysh-Schwinger approach is used, not only equilibrium but also non-equilibrium plasma, which is assumed to be ultrarelativistic, is under consideration.
Alina Czajka +3 more
core +2 more sources
Collective excitations in electron-hole bilayers [PDF]
Physical Review Letters, 2006 We report a combined analytic and Molecular Dynamics analysis of the collective mode spectrum of an electron-hole (bipolar) bilayer in the strong coupling quasi-classical limit.
A. V. Filinov +7 more
core +3 more sources
Bosonic Collective Excitations in Fermi Gases [PDF]
Reviews in Mathematical Physics, 2020 Hartree-Fock theory has been justified as a mean-field approximation for fermionic systems. However, it suffers from some defects in predicting physical properties, making necessary a theory of quantum correlations.
Benedikter, Niels
core +4 more sources
Collective excitations of a charged Fermi superfluid in the BCS-BEC crossover
New Journal of Physics, 2023 We consider collective excitations in the superfluid state of Fermi condensed charged gases. The dispersion and damping of collective excitations at nonzero temperatures are examined, and the coexistence and interaction of different branches of ...
S N Klimin +3 more
doaj +1 more source
Experimental mapping of short-wavelength phonons in proteins
The Innovation, 2022 Phonons are quasi-particles, observed as lattice vibrations in periodic materials, that often dampen in the presence of structural perturbations. Nevertheless, phonon-like collective excitations exist in highly complex systems, such as proteins, although
Utsab R. Shrestha +5 more
doaj +1 more source
Collective excitations in three-band superconductors
Condensed Matter Physics, 2023 We investigate equilibrium states, magnetic response and the normal oscillations of internal degrees of freedom (Higgs modes and Goldstone modes) of three-band superconductors accounting the terms of both internal proximity effect and the ``drag'' effect
K. V. Grigorishin
doaj +1 more source
Low-Lying Collective Excitations of Superconductors and Charged Superfluids
Condensed Matter, 2023 We investigate theoretically the momentum-dependent frequency and damping of low-lying collective excitations of superconductors and charged superfluids in the BCS–BEC crossover regime.
Serghei Klimin +2 more
doaj +1 more source
Particle-Particle Collective Excitations of Sn isotopes
ARO-The Scientific Journal of Koya University, 2023 In this paper, energy-level schemes and reduced electric transition strengths of neutron-rich Tin isotopes 102, 110, 116, 120, 122Sn (Z=50) are studied using collective models, that is, particle-particle Tamm-Dancoff Approximation and particle-particle ...
Ali H. Taqi, Fahema A. Saber
doaj +1 more source