Related Experiment Video
Updated: Sep 13, 2025
12:19
Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
Published on: April 4, 2017
8.5K
Hard and Soft Phase Slips in a Fabry-Pérot Quantum Hall Interferometer
N L Samuelson1, L A Cohen1, W Wang1
1University of California at Santa Barbara, Department of Physics, Santa Barbara, California 93106, USA.
Physical Review Letters
|July 31, 2025
Summary
Quantum Hall interferometers reveal slow quasiparticle dynamics. We observed phase slips indicating quasiparticle entry into the interferometer bulk, with equilibration times up to several minutes, distinguishing between uniform and defect-localized quasiparticles.
Area of Science:
- Condensed Matter Physics
- Quantum Optics
- Materials Science
Background:
- Quantum Hall Fabry-Pérot interferometers probe bulk quasiparticle properties and bulk-edge coupling.
- Previous research assumed rapid quasiparticle exchange with the interferometer, neglecting slow dynamics.
Purpose of the Study:
- Investigate the role of quasiparticle equilibration time in quantum Hall interferometers.
- Characterize quasiparticle dynamics and their impact on interference phase.
- Differentiate between various quasiparticle localization mechanisms within the interferometer.
Main Methods:
- Fabrication and measurement of a monolayer graphene quantum Hall interferometer.
- Operation in the integer quantum Hall regime at filling factors ν=-1 and ν=-2.
- Analysis of quantum interference phase slips as a function of magnetic field.
Main Results:
- Observed phase slips directly linked to quasiparticle entry into the interferometer bulk.
- Determined quasiparticle equilibration times, revealing they can extend to several minutes.
- Identified two distinct classes of phase slips: those from uniformly coupled bulk puddles and those from defect-trapped quasiparticles.
Conclusions:
- Quasiparticle equilibration in quantum Hall interferometers can be significantly slow, challenging previous equilibrium assumptions.
- The observed phase slips provide a sensitive probe of quasiparticle dynamics and localization.
- Distinguishing between different quasiparticle states offers new insights into disorder and interactions in quantum Hall systems.
Related Concept Videos
01:10Interference: Path Lengths
1.4K
Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
1.4K
02:31Phase Transitions
20.3K
Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
20.3K
01:02¹H NMR: Interpreting Distorted and Overlapping Signals
1.1K
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
1.1K