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Sunday, May 3, 2020 | History

3 edition of A cosmic superfluid phase found in the catalog.

A cosmic superfluid phase

A cosmic superfluid phase

  • 337 Want to read
  • 38 Currently reading

Published by Fermi National Accelerator Laboratory in [Batavia, Ill.?] .
Written in English

    Subjects:
  • Cosmology.

  • Edition Notes

    StatementBen-Ami Gradwohl.
    SeriesFERMILAB-pub -- 91/55-A., NASA-CR -- 188171., NASA contractor report -- NASA CR-188171., Fermilab pub -- 91/55-A.
    ContributionsFermi National Accelerator Laboratory., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15298939M

      () -- Superfluidity – the phase of matter that enables a fluid to move up the sides of its container – has been known about since the s. Since then, superfluidity has become a. In a superfluid, many minute vortices occur. The number of vortices is proportional to h/m, where h is Planck's constant and m is the mass of one atom. Quantized vortices are of great interest to the further study of quantum fluids, and they turn out to be theoretically similar to flux lines in superconductors.

      Superfluid Dark Matter Normal phase: At high temperatures, the fluid acts like particle dark matter, particles with masses of about eV. Superfluid phase: At low temperature, the fluid condenses and phonons mediate a new long-range force that looks like modified gravity This explains why sometimes particle dark matter works better and sometimes. Associated with the different broken symmetries are various types of defects in the order phases. For example, in the context of this chapter, quantum vortices in the superfluid and their analogues, cosmic strings in space-time. The accepted theory for the formation mechanism of defects in cosmology is known as the Kibble mechanism (Kibble, ).

      A superfluid is a phase of matter that only certain liquids or gases can assume, if they are cooled to extremely low temperatures. At temperatures approaching absolute zero, atoms cease their.   When Cornell physicists Robert Richardson, David Lee and Douglas Osheroff received the Nobel Prize for their discovery of the superfluid state of liquid helium, it was only the beginning. Now.


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A cosmic superfluid phase Download PDF EPUB FB2

COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle.

Superfluidity is the characteristic property of a fluid with zero viscosity which therefore flows without any loss of kinetic stirred, a superfluid forms vortices that continue to rotate indefinitely.

Superfluidity occurs in two isotopes of helium (helium-3 and helium-4) when they are liquefied by cooling to cryogenic temperatures. It is also a property of various other exotic. This interesting book provides the physical and mathematical background for a theory describing the universe as a quantum superfluid, and how dark energy and dark matter arise.

Presenting a novel theory spanning many different fields in physics, the key concepts in each field are reader is only expected to know the rudiments of condensed. Not only is superfluid Helium 3 one of the most fascinating of all condensed matter systems but it has also helped to shape and to test many important new ideas in modern theoretical physics.

The self-contained treatment begins with a thorough but elementary discussion of the properties of superfluid Helium 3 and related fundamental : Dieter Vollhardt, Peter Wolfle.

A cosmic superfluid phase. [Batavia, Ill.?]: Fermi National Accelerator Laboratory. MLA Citation. Gradwohl, Ben-Ami. and Fermi National Accelerator Laboratory.

and United States. National Aeronautics and Space Administration. A cosmic superfluid phase [microform] / Ben-Ami Gradwohl Fermi National Accelerator Laboratory [Batavia, Ill.?]   This interesting book provides the physical and mathematical background for a theory describing the universe as a quantum superfluid, and how dark energy and dark matter arise.

Presenting a novel theory spanning many different fields in physics, the key concepts in each field are introduced.

Superfluid helium-4 is the superfluid form of helium-4, an isotope of the element helium.A superfluid is a state of matter in which matter behaves like a fluid with zero substance, which looks like a normal liquid, flows without friction past any surface, which allows it to continue to circulate over obstructions and through pores in containers which hold it, subject.

In the case of superfluid 3 He, we can produce a very rapid phase transition by irradiating the fluid with low-energy neutrons (from a source placed outside of the cryostat). Since the 3 He nucleus is an α-particle minus one neutron, 3 He has an extremely large cross-section for thermal neutron capture.

However, any virtual α-particle does not survive and the capture process is. THE PHYSICS OF SUPERFLUID HELIUM W. Vinen School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK Abstract The paper contains a brief account of the physics of superfluid 4He, with em- phasis on the underlying physical principles; it uses the minimum of mathe-File Size: KB.

Bunkov Y.M. () “Aurore De Venise” — Cosmological Scenario of the A-B Phase Transition in Superfluid 3 He. In: Bunkov Y.M., Godfrin H. (eds) Topological Defects and the Non-Equilibrium Dynamics of Symmetry Breaking Phase Transitions.

NATO Science Series (Series C: Mathematical and Physical Sciences), vol Springer, DordrechtAuthor: Yu. Bunkov. We assume that dark energy and dark matter filling up the whole cosmic space behave as a special superfluid, here named “superfluid quantum space.” We analyze the relationship between intrinsic pressure of SQS (dark energy's repulsive force) and gravity, described as an inflow of dark energy into massive particles, causing a negative pressure gradient around massive by: 3.

Superfluid vacuum theory (SVT), sometimes known as the BEC vacuum theory, is an approach in theoretical physics and quantum mechanics where the fundamental physical vacuum (non-removable background) is viewed as superfluid or as a Bose–Einstein condensate (BEC).

The microscopic structure of this physical vacuum is currently unknown and is a subject of. Dark Matter as a Cosmic Bose-Einstein Condensate and Possible Superfluid Article in General Relativity and Gravitation 34(5) May with Reads How we measure 'reads'.

Klein‐Gordon equation. It predicts halos around galaxies with higher superfluid density, which is perceived as dark matter through gravitational lensing. In short, dark energy is the energy density of the cosmic superfluid, and dark matter arises from local fluctuations of the superfluid densityCited by: 1.

B features had to do with dynamic magnetic effects in the liquid phase. Fig 3 The phase diagram of 3He drawn in logarithmic temperature scale and zero magnetic field.(reproduced from [5]) In the above figure the zero field phase diagram of 3He is shown.

The new phases A and B are the superfluid phases that are achieved at very low temperatures File Size: KB. Behnke, D.

et al. () Description of Supernova Data in Conformal Cosmology without Cosmological Constant, Phys. Lett. B20–26;[gr-qc/] ADS Google ScholarCited by: 1. In short, dark energy is the energy density of the cosmic superfluid, and dark matter arises from local fluctuations of the superfluid density.

Comments: Invited talk at the Conference in Honor of 90th Birthday of Freeman Dyson, Institute of Advanced Studies, Nanyang Technological University, Singapore, August, Cited by: 1. If Spacetime Were a Superfluid, Would It Unify Physics—or Is the Theory All Wet.

Thinking of space and time as a liquid might help reconcile quantum mechanics and relativity By Clara Moskowitz. Cite this article. Bäuerle, C., Bunkov, Y., Fisher, S. et al. Laboratory simulation of cosmic string formation in the early Universe using superfluid 3 He. Nature.

Such ‘superfluid’ behaviour isn’t specific to helium; it is a phase of matter that, at low enough temperatures, can be reached by other particles too.

First predicted in by Einstein and the Indian physicist Satyendra Bose, this whole class of ultra-cold superfluids is now known as Bose-Einstein condensates. Superfluid 3 He. Here we discuss the superfluid phases of liquid helium 3. For more general introduction to helium see phase diagram of 3 He at low temperatures is shown in the figure.

3 He remains liquid if the pressure is less than approximately 34 atmospheres ( MPa). 3 He enters into superfluid phase at temperatures below K. There are two superfluid .Superfluid definition is - an unusual state of matter noted only in liquid helium cooled to near absolute zero and characterized by apparently frictionless flow (as through fine holes).For a superfluid flowing down a pipe (at rest) with superfluid velocity v s in z direction where P z is the total momentum.

so that In normal state, total momentum is Gaussianly distributed: so that and ρ n = ρ Ιn superfluid phase, the total momentum and v s are entangled and total momentum distribution is not Size: 9MB.