Supercurrents in Unidirectional Channels Originate from Information Transfer in the Opposite Direction: A Theoretical
Xiao-Li Huang1, Yuli V Nazarov1
1Kavli Institute of NanoScience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands.
Physical Review Letters
|May 13, 2017
Summary
Long chiral edge channels can support supercurrents via nonlocal interactions, enabling information transfer opposite to electron flow. This finding challenges previous assumptions in condensed matter physics.
Area of Science:
- Condensed Matter Physics
- Quantum Transport
Background:
- Chiral edge channels are typically thought to be unable to support supercurrents.
- Supercurrents are essential for superconducting devices and quantum information transfer.
Purpose of the Study:
- To theoretically investigate the possibility of supercurrents in long chiral edge channels.
- To explore the role of nonlocal interactions in mediating supercurrents.
Main Methods:
- Theoretical modeling of supercurrents in chiral edge channels.
- Computation of supercurrents for various nonlocal interaction models.
- Analysis of information transfer mechanisms.
Main Results:
- Demonstrated that supercurrents can be mediated in long chiral edge channels.
- Identified nonlocal interactions as the key mechanism for supercurrent mediation.
- Showed information transfer occurs in the direction opposite to electron flow.
Conclusions:
- Challenges the established understanding of chiral edge channel limitations.
- Highlights the potential of nonlocal interactions for novel quantum transport phenomena.
- Suggests new avenues for designing superconducting devices and quantum information systems.
Related Concept Videos
01:18Superposition Theorem
1.6K
The superposition principle is a fundamental concept stating that in a linear circuit, the voltage across (or current through) an element can be determined by summing the individual contributions of each independent source acting in isolation. When dealing with linear circuits containing multiple independent sources, this principle serves as a valuable tool for analysis. To apply the superposition principle effectively, one should focus on a single independent source at a time while...
1.6K
01:13Superposition Theorem for AC Circuits
1.9K
Consider encountering a circuit in a steady state where all its inputs are sinusoidal, yet they do not all possess the same frequency. Such a circuit is not classified as an alternating current (AC) circuit, and consequently, its currents and voltages will not exhibit sinusoidal behavior. However, this circuit can be analyzed using the principle of superposition.
The principle of superposition stipulates that the output of a linear circuit with several concurrent inputs is equivalent to the...
The principle of superposition stipulates that the output of a linear circuit with several concurrent inputs is equivalent to the...
1.9K
01:27Energy Considerations in Open Channel Flow
667
Open channel flow, where a fluid flows with a free surface exposed to the atmosphere, is primarily governed by gravitational and surface effects, distinguishing it from closed conduit or pipe flow. In open channels such as rivers, canals, and artificial channels, energy analysis provides valuable insights into flow behavior and the relationship between depth, velocity, and slope.Specific Energy and Flow DepthIn open channel flow, the specific energy, E, combines the gravitational potential...
667
01:19The Power Superposition Principle
467
Consider a circuit with two sinusoidal voltage sources. Each one influences the circuit independently, and the superposition principle helps us understand the combined effect by adding up the responses from each source.
467
01:21Electrochemical Gradient and Channel Proteins: An Overview
4.9K
An electrochemical gradient is a fundamental concept in biology and chemistry. It regulates the movement of ions across cell membranes. This movement is influenced by two factors:
The electrical gradient: The electrical gradient across cell membranes refers to the difference in electric charge between the inside and outside of a cell. This difference drives the movement of ions towards or away from the cells. For instance, if the inside of the cell is more negatively charged relative to...
The electrical gradient: The electrical gradient across cell membranes refers to the difference in electric charge between the inside and outside of a cell. This difference drives the movement of ions towards or away from the cells. For instance, if the inside of the cell is more negatively charged relative to...
4.9K
01:10Mesh Analysis with Current Sources
2.1K
Mesh analysis becomes simpler when analyzing circuits with current sources, whether independent or dependent. The presence of current sources reduces the number of equations required for analysis. Two cases illustrate this:
Current Source in One Mesh: The analysis process is straightforward when a current source is found in only one mesh within the circuit. Mesh currents are assigned as usual, with the mesh containing the current source excluded from the analysis. Kirchhoff's voltage law...
Current Source in One Mesh: The analysis process is straightforward when a current source is found in only one mesh within the circuit. Mesh currents are assigned as usual, with the mesh containing the current source excluded from the analysis. Kirchhoff's voltage law...
2.1K