Related Experiment Video
Updated: Oct 19, 2025
12:14
The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
Published on: August 12, 2013
22.0K
Collective-Mode Enhanced Matter-Wave Optics
Christian Deppner1, Waldemar Herr1,2, Merle Cornelius3
1Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, D-30167 Hannover, Germany.
Physical Review Letters
|September 17, 2021
Summary
Scientists created a tunable matter-wave lens using a Bose-Einstein condensate (BEC). This innovation significantly reduces the kinetic energy of atoms, enabling longer free-fall experiments for fundamental physics research.
Area of Science:
- Quantum optics
- Atomic physics
- Condensed matter physics
Background:
- Matter-wave optics in quantum gases involves interactions even in free space.
- Quantum degenerate gases offer unique properties for manipulating atom ensembles.
Purpose of the Study:
- To develop an adjustable lens for coherent atom optics using quantum degenerate gases.
- To create a time-domain matter-wave lens system by combining BEC excitation with magnetic lensing.
Main Methods:
- Exploiting interactions within a quantum degenerate gas.
- Employing an interaction-driven quadrupole-mode excitation of a Bose-Einstein condensate (BEC).
- Integrating the BEC excitation with a magnetic lens to form a time-domain matter-wave lens.
Main Results:
- Successfully formed a tunable time-domain matter-wave lens system.
- Demonstrated focus tuning via lensing potential strength and quadrupole mode phase.
- Achieved a significant reduction in the kinetic energy of a large BEC (101,000 atoms).
Conclusions:
- The developed matter-wave lens system enables precise control over atomic trajectories.
- This method facilitates free-fall experiments exceeding ten seconds for fundamental physics tests.
- Opens new possibilities for high-precision Bose-Einstein condensate interferometry and exploring novel kinetic energy regimes.
Related Concept Videos
01:30Electromagnetic Waves in Matter
3.4K
Electromagnetic waves can travel in the vacuum as well as in matter. For example light, which is an electromagnetic wave, can travel through air, water, or glass.
Consider the electromagnetic wave passing through a dielectric medium. In such a case, Maxwell's equations get modified. In Ampere's law, ε0 , the dielectric permittivity of free space is replaced with ε, the permittivity of dielectric. Also, the vacuum permeability μ0 is replaced by the permeability of the...
Consider the electromagnetic wave passing through a dielectric medium. In such a case, Maxwell's equations get modified. In Ampere's law, ε0 , the dielectric permittivity of free space is replaced with ε, the permittivity of dielectric. Also, the vacuum permeability μ0 is replaced by the permeability of the...
3.4K
02:12The Wave Nature of Light
57.0K
The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion.
57.0K
01:04Modes of Standing Waves: II
1.1K
The starting point for expressing the modes of standing waves is understanding the boundary conditions that the waves must follow. The boundary conditions are derived from the physical understanding of how the standing waves are sustained, that is, how the vibrating particles of the medium behave at the boundaries imposed on them.
For a tube open at one end and closed at the other filled with air, the modes are such that there is always an antinode at the open end and a node at the closed end....
For a tube open at one end and closed at the other filled with air, the modes are such that there is always an antinode at the open end and a node at the closed end....
1.1K
01:07Propagation of Waves
2.5K
When a wave propagates from one medium to another, part of it may get reflected in the first medium, and part of it may get transmitted to the second medium. In such a case, the interface of the two mediums can be considered as a boundary that is neither fixed nor free.
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
2.5K
01:03Modes of Standing Waves - I
3.2K
A close look at earthquakes provides evidence for the conditions appropriate for resonance, standing waves, and constructive and destructive interference. A building may vibrate for several seconds with a driving frequency matching the building's natural frequency of vibration; this produces a resonance that results in one building collapsing while the neighboring buildings do not. Often, buildings of a certain height are devastated, while other taller buildings remain intact. This...
3.2K
01:30Propagation Speed of Electromagnetic Waves
4.1K
Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
4.1K