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Related Concept Videos

Types Of Superconductors01:28

Types Of Superconductors

1.1K
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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Superconductor01:24

Superconductor

1.3K
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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Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

1.1K
An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
1.1K
Ferromagnetism01:31

Ferromagnetism

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Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
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Diamagnetism01:26

Diamagnetism

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Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
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Induced Electric Dipoles01:28

Induced Electric Dipoles

4.4K
A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
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Disentanglement-Induced Superconductivity.

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This summary is machine-generated.

This study explores quantum disentanglement to resolve conflicts between particle conservation and superconductivity. It demonstrates a phase transition into a superconducting state using the Fermi-Hubbard model.

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disentanglement

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Area of Science:

  • Condensed Matter Physics
  • Quantum Mechanics

Background:

  • Reconciling particle number conservation with superconductivity presents a theoretical challenge.
  • Existing models struggle to explain certain quantum phenomena in superconducting systems.

Purpose of the Study:

  • To investigate an alternative quantum modeling approach based on spontaneous disentanglement.
  • To explore disentanglement as a mechanism for inducing quantum phase transitions.
  • To analyze the impact of disentanglement on Josephson junction properties.

Main Methods:

  • Utilizing the Fermi-Hubbard model to simulate quantum systems.
  • Applying theoretical modeling to explore spontaneous disentanglement.
  • Analyzing quantum phase transitions and superconducting order parameters.

Main Results:

  • Demonstrated a disentanglement-induced quantum phase transition.
  • Achieved a state with a finite superconducting order parameter.
  • Investigated the effect of disentanglement on the Josephson junction's current phase relation.

Conclusions:

  • Spontaneous disentanglement offers a viable pathway to model superconductivity.
  • This approach provides a new perspective on quantum phase transitions.
  • The findings have implications for understanding Josephson junctions and quantum systems.