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Superconductor01:24

Superconductor

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A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
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A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
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Persistent superconductor currents in holographic lattices.

Norihiro Iizuka1, Akihiro Ishibashi2, Kengo Maeda3

  • 1Interdisciplinary Fundamental Physics Team, Interdisciplinary Theoretical Science Research Group, RIKEN, Wako 351-0198, Japan and Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.

Physical Review Letters
|July 18, 2014
PubMed
Summary

We explored persistent superconductor currents in a holographic model with a lattice structure. Results show currents are carried by matter fields, aligning with black hole theorems and superfluid hydrodynamics.

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Area of Science:

  • Condensed Matter Physics
  • High Energy Physics
  • Black Hole Physics

Background:

  • Persistent superconductor currents lack translational symmetry.
  • Holographic gravity models offer insights into quantum field theories.
  • Lattice structures introduce spatial inhomogeneity.

Purpose of the Study:

  • To investigate superconductor currents in a holographic model with a lattice.
  • To construct novel black brane solutions with momentum or rotation.
  • To analyze the implications for field theory and black hole physics.

Main Methods:

  • Utilizing a holographic gravity model.
  • Incorporating a lattice structure into the model.
  • Numerically constructing hairy charged stationary black brane solutions.

Main Results:

  • Novel black brane solutions with momentum/rotation along the lattice were found.
  • The lattice structure prevents black hole horizon rotation.
  • Momentum is carried by external matter fields, consistent with the black hole rigidity theorem.

Conclusions:

  • Superconductor currents in lattice field theories are likely "composite" fields.
  • The findings support consistency with superfluid hydrodynamics.
  • This work bridges concepts from condensed matter and gravitational physics.