Results 51 to 60 of about 38,463 (233)

Accelerating Luminescence in Nanostructures: Exploring the Physical Limits and Impact of Ultrafast Emission in Nanoscale Materials

open access: yesAdvanced Photonics Research, EarlyView.
This review highlights recent advances in accelerating luminescence in nanostructures through cooperative emission, resonator coupling, and nonlocal light–matter interactions. By unifying concepts such as excitonic superradiance, superfluorescence, and the plasmonic Purcell effect, it reveals physical limits of ultrafast emission and their potential ...
Masaaki Ashida   +3 more
wiley   +1 more source

Superfluid flow above the critical velocity

open access: yesScientific Reports, 2017
Superfluidity and superconductivity have been widely studied since the last century in many different contexts ranging from nuclear matter to atomic quantum gases.
A. Paris-Mandoki   +5 more
doaj   +1 more source

On Quartet Superfluidity of Fermionic Atomic Gas

open access: yes, 2005
Possibility of a quartet superfluidity in fermionic systems is studied as a new aspect of atomic gas at ultra low temperatures. The four-fold degeneracy of hyperfine state and moderate coupling is indispensable for the quartet superfluidity to occur ...
Anderson M. H.   +15 more
core   +3 more sources

Fast Simulation of Wide‐Angle Coherent Diffractive Imaging

open access: yesLaser &Photonics Reviews, EarlyView.
The propagation multi‐slice Fourier transform method is introduced as an accurate and efficient approach for describing light scattering for arbitrarily shaped objects. Its exceptional suitability for simulating coherent diffractive imaging of nanoparticles in the XUV and soft X‐ray range is demonstrated.
Paul Tuemmler   +3 more
wiley   +1 more source

Kinetic energy driven superfluidity and superconductivity and the origin of the Meissner effect

open access: yes, 2012
Superfluidity and superconductivity have many elements in common. However, I argue that their most important commonality has been overlooked: that both are kinetic energy driven. Clear evidence that superfluidity in $^4He$ is kinetic energy driven is the
Hirsch, J. E.
core   +1 more source

Gap Symmetry, Electronic Structure and Interplay Between Superconductivity and Spin Density Wave in Sr1−xKxFe2As2 Superconductor

open access: yesNano Select, EarlyView.
In moderately hole‐doped Sr1−xKxFe2As2${\rm Sr}_{1-x}{\rm K}_x{\rm Fe}_2{\rm As}_2$ system the pairing state is s+−${\rm s}^{+-}$ wave pairing state mediated by spin fluctuations. As the SDW order parameter increases, TC${\rm T}_C$ decreases and TM${\rm T}_M$ increases. As temperature increases, the SDW order parameter decreases and vanishes at TM${\rm
Gedefaw Mebratie   +2 more
wiley   +1 more source

Feynman, a superfluidez e a supercondutividade

open access: yesRevista Brasileira de Ensino de Física
Resumo É apresentada uma exposição breve e, na medida do possível, leve, das ideias em torno do entendimento da superfluidez e sua relação com a supercondutividade, com destaque ao papel de Richard Feynman.
Paulo F. Farinas
doaj   +1 more source

Thermal Control of Vortex Motion in Nanoscale Superconductors

open access: yesAdvanced Electronic Materials, Volume 12, Issue 2, 21 January 2026.
Vortices in superconducting film can be thermally steered by a local heating from a tip. The work shows that the vortex is attracted by the hot spot by a force that emulates an electric field resulting in a fictious Lorentz‐force on the vortex. Abstract Thermally induced motion of vortices in nanoscale superconductors (SCs) is investigated.
Björn Niedzielski, Jamal Berakdar
wiley   +1 more source

Critical velocity of flowing supersolids of dipolar Bose gases in optical lattices

open access: yes, 2010
We study superfluidity of supersolid phases of dipolar Bose gases in two-dimensional optical lattices. We perform linear stability analyses for the corresponding dipolar Bose-Hubbard model in the hardcore boson limit to show that a supersolid can have ...
A. F. Andreev   +3 more
core   +1 more source

Identifying early changes in imaging, plasma, and digital cognitive biomarkers that correspond to Alzheimer's disease pathology in the presence of autopsy‐confirmed co‐pathologies

open access: yesAlzheimer's &Dementia, Volume 22, Issue 1, January 2026.
Abstract INTRODUCTION Alzheimer's disease (AD) biomarkers are assessed on their ability to detect AD pathophysiology in vivo, with confirmation of AD neuropathology only at autopsy. METHODS Positron emission tomography (PET), plasma, and cognitive AD biomarkers were compared to AD neuropathology in Harvard Aging Brain Study participants (10 cognitively
Charles D. Chen   +19 more
wiley   +1 more source

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