Related Experiment Video
Updated: Jan 4, 2026
05:39
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
10.2K
Experimental Investigation of Superdiffusion via Coherent Disordered Quantum Walks
Andrea Geraldi1, Alessandro Laneve1, Luis Diego Bonavena1
1Dipartimento di Fisica, Sapienza Università di Roma, Piazzale Aldo Moro, 5, I-00185 Roma, Italy.
Physical Review Letters
|November 9, 2019
Summary
We experimentally observed superdiffusive dynamics in quantum walks, bridging classical diffusion and quantum ballistic spreading. Our findings offer insights into energy transport in disordered quantum systems.
Area of Science:
- Quantum physics
- Condensed matter physics
- Statistical mechanics
Background:
- Disordered systems often exhibit superdiffusive dynamics, a behavior intermediate between classical diffusion and quantum ballistic spreading.
- Understanding these dynamics is crucial for phenomena like energy transport in quantum systems.
Purpose of the Study:
- To experimentally investigate the superdiffusive behavior of quantum walks in disordered systems.
- To achieve high resolution for distinguishing between different disorder regimes.
- To explore the controllable transition between ballistic and diffusive spreading without inducing decoherence.
Main Methods:
- Experimental realization of a quantum walk.
- High-resolution measurement of particle spreading.
- System parameter tuning to control disorder and evolution.
Main Results:
- Successfully observed and characterized superdiffusive dynamics in the quantum walk.
- Demonstrated the ability to distinguish between various disorder regimes.
- Showcased experimental control over the transition from ballistic to diffusive spreading.
Conclusions:
- The experimental setup effectively probes superdiffusion in quantum walks.
- This work provides a controllable platform for studying energy transport in disordered quantum systems.
- The findings contribute to understanding fundamental quantum dynamics and potential applications.
More Related Videos
06:55Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
Published on: September 26, 2016
8.3K
11:34Controlled Synthesis and Fluorescence Tracking of Highly Uniform PolyN-isopropylacrylamide Microgels
Published on: September 8, 2016
10.7K
Related Concept Videos
02:32The de Broglie Wavelength
32.8K
In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
32.8K
03:48Behavior of Gas Molecules: Molecular Diffusion, Mean Free Path, and Effusion
31.0K
Although gaseous molecules travel at tremendous speeds (hundreds of meters per second), they collide with other gaseous molecules and travel in many different directions before reaching the desired target. At room temperature, a gaseous molecule will experience billions of collisions per second. The mean free path is the average distance a molecule travels between collisions. The mean free path increases with decreasing pressure; in general, the mean free path for a gaseous molecule will be...
31.0K
01:15Theories of Dissolution: Diffusion Layer Model
1.5K
Dissolution, the process by which drug particles dissolve in a solvent, is explained by the diffusion layer model, a theoretical framework that simulates the absorption of oral drugs and allows us to analyze experimental data.
This process starts with a thin layer, saturated with the drug, forming at the interface between the solid and liquid. The solute then diffuses from this layer into the main solution. The Noyes-Whitney equation suggests that the rate of dissolution relies on the diffusion...
This process starts with a thin layer, saturated with the drug, forming at the interface between the solid and liquid. The solute then diffuses from this layer into the main solution. The Noyes-Whitney equation suggests that the rate of dissolution relies on the diffusion...
1.5K
02:45The Quantum-Mechanical Model of an Atom
56.3K
Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
56.3K
01:10First Law: Particles in One-dimensional Equilibrium
7.8K
Newton's first law of motion states that a body at rest remains at rest, or if in motion, remains in motion at constant velocity, unless acted on by a net external force. It also states that there must be a cause for any change in velocity (a change in either magnitude or direction) to occur. This cause is a net external force. For example, consider what happens to an object sliding along a rough horizontal surface. The object quickly grinds to a halt, due to the net force of friction. If...
7.8K
01:12Diffusion
215.5K
Diffusion is the passive movement of substances down their concentration gradients—requiring no expenditure of cellular energy. Substances, such as molecules or ions, diffuse from an area of high concentration to an area of low concentration in the cytosol or across membranes. Eventually, the concentration will even out, with the substance moving randomly but causing no net change in concentration. Such a state is called dynamic equilibrium, which is essential for maintaining overall...
215.5K