Origin of current phase relation in Josepshon junction.

In summary, a Josephson junction is a device made of two superconducting materials separated by an insulating barrier. It works by utilizing the superconducting properties of the materials and manipulating the flow of current through the junction. The current phase relation in a Josephson junction is a result of the Josephson effect and can be measured using Josephson interferometry. This phenomenon has practical applications such as detecting magnetic fields and microwaves, serving as a voltage standard, and aiding in quantum computing.
  • #1
YHFa
1
0
At the superconductor-superconductor point contact regime,
two Andreev bound states carries supercurrent through the S-weak links-S interface.
According to literature, current can be simply expressd
Eq1) I_S=(1/Phi_0)*dE_A/d Phi
here I_S : supercurrent, Phi_0 = flux quantum, E_A : Andreev bound state energy, Phi : Phase difference between two superconductor.
Do you have any idea about the origin of this relation?
 
Physics news on Phys.org
  • #2
Maybe you could provide a reference?
 

Related to Origin of current phase relation in Josepshon junction.

1. What is a Josephson junction?

A Josephson junction is a type of device that consists of two superconducting materials separated by a thin insulating barrier. It is named after physicist Brian David Josephson, who predicted the phenomenon of current flow between the two superconductors in the absence of a voltage difference.

2. How does a Josephson junction work?

A Josephson junction works by exploiting the superconducting properties of the two materials. When a voltage is applied across the junction, a supercurrent (flow of electrons without resistance) is induced through the insulating barrier, resulting in a phase difference between the two superconductors. This phase difference can be used to manipulate the flow of current through the junction.

3. What is the origin of the current phase relation in a Josephson junction?

The current phase relation in a Josephson junction is a result of the quantum mechanical phenomenon known as the Josephson effect. This effect describes the flow of supercurrent between two superconductors as a function of the phase difference between them.

4. How is the current phase relation measured in a Josephson junction?

The current phase relation in a Josephson junction can be measured using a technique called Josephson interferometry. This involves sending a microwave signal through the junction and measuring the resulting voltage output, which is directly related to the phase difference between the superconductors.

5. What are the practical applications of the current phase relation in Josephson junctions?

The current phase relation in Josephson junctions has many practical applications, including as a highly sensitive detector for magnetic fields and microwave signals, as a precision voltage standard, and in quantum computing as a way to manipulate and store quantum information.

Similar threads

Engineering Current phase angle difference (AC circuit)
    • Engineering and Comp Sci Homework Help
Replies
33
Views
3K
128 Quantum System D-Wave System on arxiv.org
    • Atomic and Condensed Matter
Replies
3
Views
2K
A MOND Theory Primer: Stacy McGaugh's Research Program Explored
    • Beyond the Standard Models
Replies
11
Views
2K
Heisenberg-Robertson uncertainty relation vs. noise-disturbance measures
    • Quantum Physics
Replies
2
Views
3K
EM fields of two opposite moving point charges
    • Introductory Physics Homework Help
Replies
1
Views
1K
How is radio wave propagation modelled in seawater?
    • Optics
Replies
12
Views
9K
Relative phase in infinite square well
    • Quantum Physics
Replies
3
Views
1K
Are Women and New Researchers Shaping the Future of Quantum Gravity Studies?
    • Beyond the Standard Models
Replies
24
Views
7K
Magnetic Reconnection vs Double Layers
    • Astronomy and Astrophysics
Replies
8
Views
4K
Sifting through the first quarter 2010 papers
    • Beyond the Standard Models
Replies
2
Views
2K

Hot Threads

Recent Insights

Back
Top