Related Experiment Video
Updated: May 23, 2025
11:33
All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
Published on: January 19, 2018
9.5K
Attosecond Clocking and Control of Strong Field Quantum Trajectories
Andrew J Piper1, Qiaoyi Liu1, Abraham Camacho Garibay1
1The Ohio State University, Department of Physics, Columbus, Ohio 43210, USA.
Physical Review Letters
|March 7, 2025
Summary
Researchers developed a quantum trajectory selector to observe electron dynamics in real-time. This method reveals how ionization timing influences strong-field phenomena, offering new insights into electron recollision physics.
Area of Science:
- Quantum dynamics
- Attosecond science
- Strong-field physics
Background:
- Understanding electron dynamics in strong laser fields is crucial for attosecond science.
- Real-time observation of quantum trajectories is challenging.
Purpose of the Study:
- To introduce a quantum trajectory selector method for real-time observation of electron dynamics.
- To investigate the dependence of electron dynamics on ionization time in strong-field phenomena.
Main Methods:
- Utilizing an attosecond extreme ultraviolet pulse train to select ionization moments.
- Employing a phase-locked near-infrared field (1.77 or 2.4 µm) to drive electron dynamics.
- Measuring rates of rescattered electron emission and double ionization.
Main Results:
- Resolved individual quantum trajectories in real time.
- Observed an intensity-dependent shift in ionization time for double ionization.
- Clocked this ionization time shift, varying by 250 attoseconds.
Conclusions:
- The quantum trajectory selector enables real-time resolution of electron dynamics.
- Provides a new attosecond paradigm for studying recollision-driven physics.
- Reveals critical insights into ionization timing effects in strong-field interactions.
Related Concept Videos
02:45The Quantum-Mechanical Model of an Atom
41.8K
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.
41.8K
02:32The de Broglie Wavelength
25.2K
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...
25.2K
01:11Atomic Nuclei: Larmor Precession Frequency
1.1K
The earth's gravitational field produces a 'twisting force' perpendicular to the angular momentum of a spinning mass (such as a spinning top) that causes the mass to 'wobble' around the gravitational field axis in a phenomenon called precession. Similarly, the magnetic moment (μ) of a spinning nucleus precesses due to an external magnetic field directed along the z-axis. The precession of the magnetic moment vector about the magnetic field is called Larmor precession,...
1.1K
01:12Fermi Level Dynamics
214
The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
214
01:22Motion Of A Charged Particle In A Magnetic Field
4.4K
A charged particle experiences a force when moving through a magnetic field. Consider the field to be uniform and the charged particle to move perpendicular to it. If the field is in a vacuum, the magnetic field is the dominant factor determining the motion. Since the magnetic force is perpendicular to the direction of motion, a charged particle follows a curved path. The particle continues to follow this curved path until it forms a complete circle. Another way to look at this is that the...
4.4K
01:03Atomic Nuclei: Nuclear Spin State Overview
841
NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of...
841