Results 111 to 120 of about 12,791 (220)
Superradiance transition in graphene [PDF]
Physics Letters A, 2015 We study theoretically and numerically the conditions required for the appearance of a superradiance transition in graphene. The electron properties of graphene are described in the single $p_z$-orbital tight-binding approximation, in which the model is reduced to the effective two-level pseudo-spin $1/2$ system.
Alexander I. Nesterov +3 more
openaire +2 more sources
Room‐Temperature Collective Quantum Emission Mediated by Wannier–Mott Excitons in CsPbBr3 Nanowires
Small Science, Volume 5, Issue 11, November 2025.Room‐temperature collective quantum emission emerges in partially aligned CsPbBr3 nanowires through spontaneous synchronization of Wannier–Mott excitons. This alignment enables cooperative dipole–dipole interactions that result in coherent photon bursts (N2 × hν), even under ambient conditions.
Mutibah Alanazi +9 more
wiley +1 more source
Mode competition in superradiant scattering of matter waves
, 2011 Superradiant Rayleigh scattering in a Bose gas released from an optical lattice is analyzed with incident light pumping at the Bragg angle for resonant light diffraction.
Chen, Xuzong +5 more
core +1 more source
Geophysical Research Letters, Volume 52, Issue 19, 16 October 2025.Abstract We present a novel nonlinear model for whistler‐mode chorus amplification based on the free‐electron laser (FEL) mechanism. First, we derive the nonlinear collective variable equations for the whistler‐electron interaction. Consistent with in situ satellite observations, these equations predict that a small seed wave can undergo exponential ...
Brandon Bonham, Amitava Bhattacharjee
wiley +1 more source
Optimization of photon storage fidelity in ordered atomic arrays
New Journal of Physics, 2018 A major application for atomic ensembles consists of a quantum memory for light, in which an optical state can be reversibly converted to a collective atomic excitation on demand. There exists a well-known fundamental bound on the storage error, when the
M T Manzoni +5 more
doaj +1 more source
Stability of warped AdS3 black holes in Topologically Massive Gravity under scalar perturbations
, 2013 We demonstrate that the warped AdS3 black hole solutions of Topologically Massive Gravity are classically stable against massive scalar field perturbations by analysing the quasinormal and bound state modes of the scalar field. In particular, it is found
Ferreira, Hugo R. C.
core +1 more source
Experimental Fock-State Superradiance [PDF]
Physical Review Letters, 2018 Superradiance in an ensemble of atoms leads to the collective enhancement of radiation in a particular mode shared by the atoms in their spontaneous decay from an excited state. The quantum aspects of this phenomenon are highlighted when such collective enhancement is observed in the emission of a single quantum of light.
Gutierrez, L. G. O. +8 more
openaire +3 more sources
Small Structures, Volume 6, Issue 9, September 2025.Luminescent quantum‐confined perovskite nanocrystals self‐assemble into various superlattice shapes: rhombic, rectangular, and hollow frames. The self‐assembly conditions, nanocrystals, and superlattices are studied with optical and electron microscopies and X‐ray nanodiffraction to identify the origin of different shapes.
Matheus Gomes Ferreira +10 more
wiley +1 more source
Polarization control of radiation and energy flow in dipole-coupled nanorings
New Journal of Physics, 2020 Collective optical excitations in dipole-coupled nanorings of sub-wavelength spaced quantum emitters exhibit extreme sub-radiance and field confinement facilitating an efficient and low-loss ring-to-ring energy transfer.
J Cremer +4 more
doaj +1 more source
Hairy black holes and the endpoint of AdS$_4$ charged superradiance
, 2017 We construct hairy black hole solutions that merge with the anti-de Sitter (AdS$_4$) Reissner-Nordstr\"om black hole at the onset of superradiance. These hairy black holes have, for a given mass and charge, higher entropy than the corresponding AdS$_4 ...
Dias, Oscar J. C., Masachs, Ramon
core +1 more source