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Roton

Known as: Roton (disambiguation) 
In theoretical physics, a roton is an elementary excitation, or quasiparticle, in superfluid helium-4. The dispersion relation of elementary… 
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Related topics

Related topics

4 relations
Macroscopic quantum phenomenaPhononQuasiparticleSecond sound

Papers overview

Semantic Scholar uses AI to extract papers important to this topic.
2017
2017
Development of a multi-physical 2-D model of PEM fuel cell for real-time control
In this paper, a two-dimensional modeling approach for a proton exchange membrane fuel cell (PEMFC) for real-time control… 
2013
2013
DENSITY WAVES IN DIPOLAR BOSE-EINSTEIN CONDENSATES
Density waves in cigar-shaped dipolar Bose-Einstein condensates are analysed by variational means and we show analytically how… 
2012
2012
Volume element structure and roton-maxon-phonon excitations in superfluid helium beyond the Gross-Pitaevskii approximation
We propose a theory which deals with the structure and interactions of volume elements in liquid helium II. The approach consists… 
2011
2011
Phonon generation in condensed 4He by laser-excited atomic bubbles
We discuss the interaction between nanometer-sized defects (atomic bubbles) and elementary excitations (phonons) in quantum… 
2009
2009
Roton dipole moment
The roton excitation in the superfluid 4He does not possess a stationary dipole moment. However, a roton has an instantaneous… 
2006
2006
Optimization of cathode catalyst layer for direct methanol fuel cells Part II: Computational modeling and design
2003
2003
UCN production in superfluid helium
Abstract:Ultra-cold neutrons (UCN) are produced in superfluid helium by single- and multi-phonon excitation. The UCN production… 
Review
2001
Review
2001
The Nonlinear Schrödinger Equation as a Model of Superfluidity
The results of theoretical and numerical studies of the Gross-Pitaevskii (GP) model are reviewed. This model is used to elucidate… 
1999
1999
The Search for Proton Decay at Super-Kamiokande
Seventy years ago (in 1929) Weyl proposed that the proton was absolutely stable. In later years this hypothesis was advanced by… 
1971
1971
Taxonomy and biology of some pyemotidae (Acarina: Tarsonemoidea) inhabiting bark beetle galleries in North American conifers
The Pyemotid genera Pygmephorus and Pyemotes are redefined. The former is divided into two morphologically and ecologically… 
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