Researchers designed a cold atom source that uses four mirrors arranged like a pyramid and placed in a way that allows them to slide past each other like the petals of a flower. This creates an adjustable hole at the top of the pyramid through which the cold atoms are pushed out. This image show a rendering of the device.
Credit: Christopher Foot, Oxford University
Technology advance could enable space-based atomic clocks, improving communications and GPS navigation
Although quantum technology has proven valuable for highly precise timekeeping, making these technologies practical for use in a variety of environments is still a key challenge. In an important step toward portable quantum devices, researchers have developed a new high-flux and compact cold-atom source with low power consumption that can be a key component of many quantum technologies.
“The use of quantum technologies based on laser-cooled atoms has already led to the development of atomic clocks that are used for timekeeping on a national level,” said research team leader Christopher Foot from Oxford University in the U.K. “Precise clocks have many applications in the synchronization of electronic communications and navigation systems such as GPS. Compact atomic clocks that can be deployed more widely, including in space, provide resilience in communications networks because local clocks can maintain accurate timekeeping even if there is a network disruption.”
In The Optical Society (OSA) journal Optics Express, S. Ravenhall, B. Yuen and Foot describe work carried out in Oxford, U.K. to demonstrate a completely new design for a cold atom source. The new device is suitable for a wide range of cold-atom technologies.
“In this project we took a design we made for research purposes and developed it into a compact device,” said Foot. “In addition to timekeeping applications, compact cold-atom devices can also be used for instruments for gravity mapping, inertial navigation and communications and to study physical phenomena in research applications such as dark matter and gravitational waves.”
Cooling atoms with light
Although it may seem counterintuitive, laser light can be used to cool atoms to extremely low temperatures by exerting a force that slows the atoms down. This process can be used to create a cold-atom source that generates a beam of laser-cooled atoms directed toward a region where precision measurements for timekeeping or detecting gravitational waves, for example, are carried out.
Laser cooling usually requires a complicated arrangement of mirrors to shine light onto atoms in a vacuum from all directions. In the new work, the researchers created a completely different design that uses just four mirrors. These mirrors are arranged like a pyramid and placed in a way that allows them to slide past each other like the petals of a flower to create a hole at the top of the pyramid through which the cold atoms are pushed out. The size of this hole can be adjusted to optimize the flow of cold atoms for various applications. The pyramid arrangement reflects the light from a single incoming laser beam that enters the vacuum chamber through a single viewport, thus greatly simplifying the optics.
The mirrors, which are located inside the vacuum region of the cold-atom source, were created by polishing metal and applying a dielectric coating. “The adjustability of this design is an entirely new feature,” said Foot. “Creating a pyramid from four identical polished metal blocks simplifies the assembly, and it can be used without the adjustment mechanism.”
Better measurements with more atoms
To test their new cold-atom source design, the researchers constructed laboratory equipment to fully characterize the flux of atoms emitted through a hole at the apex of the pyramid.
“We demonstrated an exceptionally high flux of rubidium atoms,” said Foot. “Most cold-atom devices take measurements that improve with the number of atoms used. Sources with a higher flux can thus be used to improve measurement accuracy, boost the signal-to-noise ratio or help achieve larger measurement bandwidths.”
The researchers say that the new source is suitable for commercial application. Because it features a small number of components and few assembly steps, scaling up production to produce multiple copies would be straightforward.
Original Article: New Cold Atom Source Lays Groundwork for Portable Quantum Devices
The Latest Updates from Bing News & Google News
Go deeper with Bing News on:
Portable quantum devices
- Google Quantum, Virtually
Want to try a big quantum computer but don’t have the cash? Google wants to up your simulation game with their “Quantum Virtual Machine” that you can use for free. On the face of it ...
- 'Quantum Flute' Gets Light Particles to Move in Strange Ways
Physicists have invented a “quantum flute” that, like the Pied Piper, can coerce particles of light to move together in a way that’s never been seen before. Described in two studies published ...
- Mobile Computing Devices Market Analysis, Segmentation, Size, Share, Trend, Future Demand and Is Expected to Grasp USD 4.70 Billion by 2029
The comprehensive industry research on "Global Mobile Computing Devices Market" published by Data Bridge Market research includes growth analysis, regional marketing, ...
- Quantum Cascade Lasers Market Size Current Trends, Segmentation, Key Players and Analysis 2022-2031
Quantum cascade lasers are semiconductor lasers which offer peak emission in the mid-IR range (4 μm to 10 μm). These devices are a great light source for mid-IR applications, such as molecular ...
- Smart Quantum Camera Enhances Imaging System Resolution
Researchers have presented a smart quantum camera for super-resolving image analysis that uses the self-learning capabilities of machine learning to recognize the statistical variability of unknown ...
Go deeper with Google Headlines on:
Portable quantum devices
Go deeper with Bing News on:
- Bosch’s new partnership aims to explore quantum digital twins
Bosch's partnership with Multiverse Computing is an example of how many legacy companies are exploring quantum computing today to prepare for more capable hardware.
- Quantum control for advanced technology: Past and present
Quantum devices are a promising technological advance for the future, but this will hinge on the application of quantum optimal control top real-world devices. A new review looks at the status of the ...
- Computational power unleashed with quantum digits
In a recent study published in Nature Physics, researchers at the University of Innsbruck, Austria, have unleashed the hidden computational resources that | Technology ...
- A roadmap for the future of quantum simulation
A roadmap for the future direction of quantum simulation has been set out in a paper co-authored at the University of Strathclyde.
- Quantum cryptography: Hacking is futile
An international team has successfully implemented an advanced form of quantum cryptography for the first time. Moreover, encryption is independent of the quantum device used and therefore even more ...