Researchers at the U.S. Naval Research Laboratory (NRL) developed a new technique that could enable future advancements in quantum technology.
The technique squeezes quantum dots, tiny particles made of thousands of atoms, to emit single photons (individual particles of light) with precisely the same color and with positions that can be less than a millionth of a meter apart.
“This breakthrough could accelerate the development of quantum information technologies and brain-inspired computing,” said Allan Bracker, a chemist at NRL and one of the researchers on the project.
In order for quantum dots to “communicate” (interact), they have to emit light at the same wavelength. The size of a quantum dot determines this emission wavelength. However, just as no two snowflakes are alike, no two quantum dots have exactly the same size and shape — at least when they’re initially created.
This natural variability makes it impossible for researchers to create quantum dots that emit light at precisely the same wavelength [color], said NRL physicist Joel Grim, the lead researcher on the project.
“Instead of making quantum dots perfectly identical to begin with, we change their wavelength afterwards by shrink-wrapping them with laser-crystallized hafnium oxide,” Grim said. “The shrink wrap squeezes the quantum dots, which shifts their wavelength in a very controllable way.”
While other scientists have demonstrated “tuning” of quantum dot wavelengths in the past, this is the first time researchers have achieved it precisely in both wavelength and position.
“This means that we can do it not just for two or three, but for many quantum dots in an integrated circuit, which could be used for optical, rather than electrical computing,” Bracker said.
The wide breadth of researcher expertise and science assets at NRL allowed the team to test various approaches to making this quantum dot breakthrough in a relatively short amount of time.
“NRL has in-house facilities for crystal growth, device fabrication, and quantum optical measurements,” Grim said. “This means that we could immediately coordinate our efforts to focus on rapidly improving the material properties.”
According to Grim and Bracker, this milestone in the manipulation of quantum dots could lay the groundwork for future strides in a number of areas.
“NRL’s new method for tuning the wavelength of quantum dots could enable new technologies that use the strange properties of quantum physics for computing, communication and sensing,” Bracker said. “It may also lead to ‘neuromorphic’ or brain-inspired computing based on a network of tiny lasers.”
Applications in which space and power-efficiency are limiting factors may also benefit from this breakthrough approach, researchers said.
The Latest on: Quantum networks
[google_news title=”” keyword=”quantum networks” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]
via Google News
The Latest on: Quantum networks
- Everything You Should Know About Progressive Multifocal Leukoencephalopathy (PML) Viruson January 23, 2023 at 4:01 pm
What is the PML virus? PML stands for progressive multifocal leukoencephalopathy. It’s an aggressive viral disease of the central nervous system. The virus attacks cells that make myelin.
- Virus plus microplastics equal double whammy for fish healthon January 23, 2023 at 1:30 pm
The team wanted to determine whether a "cause-and-effect" might occur between microplastics, virus, and fish mortality. Seeley and colleagues thus exposed aquarium-kept rainbow trout to low ...
- 'Not afraid of the virus': Wuhan turns page on COVID, three years onon January 23, 2023 at 12:50 am
Residents of China's Wuhan said Monday they were hopeful for the future and no longer afraid of COVID-19, three years after the city was locked down over what was then a mysterious virus.
- World-first computational reconstruction of a virus in its biological entiretyon January 20, 2023 at 10:16 am
An Aston University researcher has created the first ever computer reconstruction of a virus, including its complete native genome. Although other researchers have created similar reconstructions ...
- First computational reconstruction of a virus in its biological entiretyon January 19, 2023 at 4:00 pm
Although other researchers have created similar reconstructions, this is the first to replicate the exact chemical and 3D structure of a 'live' virus. The breakthrough could lead the way to ...
- Specific immune response to Epstein-Barr virus discoveredon January 19, 2023 at 12:26 pm
Medical science has not yet been able to explain why the Epstein-Barr virus triggers infectious mononucleosis (IM) in some people with initial infections and not in others. But now, a research ...
- When young children test positive for Covid-19 and another respiratory virus, their illness may be much more severe, a new study suggestson January 18, 2023 at 5:42 am
When Covid-19 patients younger than 5 also test positive for another respiratory virus, they tend to become sicker and develop more severe disease, a new study suggests. Among hospitalized ...
- Exploring a novel amplicon-based mpox virus sequencing strategyon January 18, 2023 at 4:51 am
Study: Development of an amplicon-based sequencing approach in response to the global emergence of human monkeypox virus. Image Credit: FOTOGRIN/Shutterstock The multi-country epidemic of mpox in ...
- Most 'long COVID' symptoms after mild case of virus resolve in about a year: new studyon January 12, 2023 at 5:38 pm
Most people with "long COVID" following a mild case of the COVID-19 virus have their symptoms resolve after a year, according to a new study out of Israel. "Long COVID" is defined by the Centers ...
- Mother who passed cold-like virus onto her daughter was told she’d never walk or talkon January 12, 2023 at 9:24 am
Courtney caught common cytomegalovirus (CMV) - a virus that causes cold-like symptoms - eight weeks into her pregnancy, which then passed on to Minnie-Mae. The virus, which is transferred in ...
via Bing News