The possibility of realizing the regime of punctuated spin superradiance is advanced. In this regime, the number of superradiant pulses and the temporal intervals between them can be regulated. This makes it feasible to compose a kind of a Morse code alphabet and, hence, to develop a technique of processing information.
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http://dx.doi.org/10.1103/PhysRevLett.88.257601 | DOI Listing |
Proc Natl Acad Sci U S A
September 2023
Oceanlab, Institute of Biological & Environmental Sciences, University of Aberdeen, Newburgh, Aberdeen AB24 3FX, United Kingdom.
Vertebrate macroevolution has been punctuated by fundamental habitat transitions from shallow marine origins to terrestrial, freshwater, and aerial environments. Invasion of the deep sea is a less well-known ecological shift because of low fossilization potential and continual loss of abyssal fossil record by ocean floor subduction. Therefore, there has been a lack of convincing evidence of bottom-living vertebrates from pre-Paleogene deep seas.
View Article and Find Full Text PDFPhys Rev Lett
November 2021
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371.
The vibrational density of states D(ω) of solids controls their thermal and transport properties. In crystals, the low-frequency modes are extended phonons distributed in frequency according to Debye's law, D(ω)∝ω^{2}. In amorphous solids, phonons are damped, and at low frequency D(ω) comprises extended modes in excess over Debye's prediction, leading to the so-called boson peak in D(ω)/ω^{2} at ω_{bp}, and quasilocalized ones.
View Article and Find Full Text PDFTransl Psychiatry
August 2017
Centre de Référence des Mastocytoses, Université Paris Descartes, Sorbonne, Paris Cité, Hôpital Necker-Enfants Malades, Fondation Imagine, Paris, France.
Mastocytosis is a rare disease in which chronic symptoms are related to mast cell accumulation and activation. Patients can display depression-anxiety-like symptoms and cognitive impairment. The pathophysiology of these symptoms may be associated with tissular mast cell infiltration, mast cell mediator release or both.
View Article and Find Full Text PDFPlant Physiol Biochem
May 2013
Physical Chemistry-PRALIB, School of Pharmacy and Biochemistry, University of Buenos Aires-CONICET, Junín 956, Buenos Aires, Argentina.
The subcellular localization of NO generation in soybean cotyledons, and the relationship between NO synthesis and in vivo chloroplast performance were studied. Employing the NO probe 4-aminomethyl-2',7'-difluorofluorescein diacetate (DAF-FM DA) and fluorescence microscopy, a strongly punctuated fluorescence was detected in mesophyll cells. The co-localization of DAF-FM and chlorophyll fluorescence, in confocal laser microscopy images, indicated the presence of NO in the chloroplasts.
View Article and Find Full Text PDFPhys Rev E Stat Nonlin Soft Matter Phys
May 2011
Center for Polymer Studies and Department of Physics, Boston University, Boston, Massachusetts 02215, USA.
We investigate the properties of the Ising-Glauber model on a periodic cubic lattice of linear dimension L after a quench to zero temperature. The resulting evolution is extremely slow, with long periods of wandering on constant energy plateaus, punctuated by occasional energy-decreasing spin-flip events. The characteristic time scale τ for this relaxation grows exponentially with the system size; we provide a heuristic and numerical evidence that τ~exp(L(2)).
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