PRESS-NEWS.org - Press Release Distribution
PRESS RELEASES DISTRIBUTION

Breakthrough in tin-vacancy centers for quantum network applications

Breakthrough in tin-vacancy centers for quantum network applications
2023-02-24
(Press-News.org)

Quantum entanglement refers to a phenomenon in quantum mechanics in which two or more particles become linked such that the state of each particle cannot be described independently of the others, even when they are separated by a large distance. The principle, referred to by Albert Einstein as "spooky action at a distance", is now utilized in quantum networks to transfer information. The building blocks of these networks—quantum nodes—can generate and measure quantum states.

Among the candidates that can function as quantum nodes, the Sn-V center in diamond (a defect where a tin (Sn) atom replaces a carbon atom, resulting in an interstitial Sn atom between two carbon vacancies) has been shown to have suitable properties for quantum network applications. The Sn-V center is expected to exhibit a long spin coherence time in the millisecond range at Kelvin temperatures, allowing it to maintain its quantum state for a relatively long period of time. However, these centers have yet to produce photons with similar characteristics, which is a necessary criterion for creating remote entangled quantum states between quantum network nodes.

Now in a study published in Physical Review Applied, researchers led by Associate Professor Takayuki Iwasaki from Tokyo Institute of Technology (Tokyo Tech), Japan, have observed Sn-V centers with identical photon frequency and linewidth, marking a new phase in the use of these centers as quantum nodes. 

“Control of the linewidth and wavelength is challenging in solid-state materials. This is especially true for Sn-V centers—which are composed of heavy atoms—because their incorporation in diamond causes more defects and higher strain around emitters,” says Dr. Iwasaki. 

The researchers used a combination of ion implantation, and high-pressure-high-temperature (HPHT) annealing to form Sn-V centers in diamond. Ion implantation was used to implant Sn ions into diamond substrates. These samples were then exposed to high temperatures of 2100 °C and high pressures of 7.7 GPa in a belt-type apparatus. With this two-step process, the researchers eliminated the effects of surface defects and strain on the optical properties of the Sn-V centers and addressed issues with defects normally faced when generating the Sn-V centers.

“The high-temperature treatment efficiently addressed the lattice damage. Consequently, the strain around the emitters was largely suppressed. Moreover, the Sn-V centers were formed at a depth of approximately 3 micrometers from the surface of the samples. This suppressed the effect of strain and charged defects at the surface, potentially shifting the energy level of the emitters,” Dr. Iwasaki tells us. 

On subsequently scanning the different areas of the sample with a narrow linewidth tunable laser and analyzing the emitted light, the team observed multiple Sn-V centers with nearly identical photon frequencies and linewidths, marking the successful formation of stable Sn-V centers which were suitable for use as quantum nodes.  

Dr. Iwasaki is optimistic about the future implications of their work. “The formation of high-quality Sn-V centers directly leads to the observation of two-photon interference between distant emitters and the future establishment of Sn-V centers in diamond as a quantum-light matter interface,” he says.

END


[Attachments] See images for this press release:
Breakthrough in tin-vacancy centers for quantum network applications

ELSE PRESS RELEASES FROM THIS DATE:

Low income, race, and rural residence among risk factors for low telemedicine literacy

Low income, race, and rural residence among risk factors for low telemedicine literacy
2023-02-24
February 24, 2023 – Demographic factors including low income and living in a rural area are linked to low telemedicine literacy – which may limit access to plastic surgeons and other healthcare providers at a time of expanding use of telehealth and video visits, according to a report in the March issue of Plastic and Reconstructive Surgery®, the official medical journal of the American Society of Plastic Surgeons (ASPS). The journal is published in the Lippincott portfolio by Wolters Kluwer. "Our ...

Risk of cancer remains high for women over 50 with genetic BRCA1 or BRCA2 mutation

Risk of cancer remains high for women over 50 with genetic BRCA1 or BRCA2 mutation
2023-02-24
Although genetic mutations in BRCA1 or BRCA2 are associated with a younger onset of breast and ovarian cancer, women with these genetic mutations continue to face a high risk of cancer incidence after age 50, even if they have not been previously diagnosed with cancer. This is according to a new study led by Kelly Metcalfe, a professor at the Lawrence S. Bloomberg Faculty of Nursing. The study published recently in the American Cancer Society Journal Cancer, followed over 2000 women between the ages of 50 to 75, from 16 countries, who were aware they had a BRCA mutation ...

Cleft lip and palate surgery procedures are undervalued, study suggests

2023-02-24
February 24, 2023 – Plastic surgery procedures performed to correct cleft lip and palate deformities in infants and children are economically undervalued, relative to pediatric craniofacial procedures, concludes an analysis in the March issue of Plastic and Reconstructive Surgery®, the official medical journal of the American Society of Plastic Surgeons (ASPS). The journal is published in the Lippincott portfolio by Wolters Kluwer. The study finds unbalanced allocation of relative value units (RVUs) used in billing and compensation for cleft surgery in children, compared to craniofacial procedures, report Roberto L. Flores, MD, of Hansjörg ...

Insomnia tied to greater risk of heart attack, especially in women

2023-02-24
People who suffer from insomnia were 69% more likely to have a heart attack compared to those who didn’t have the sleep disorder during an average nine years of follow-up, according to new research being presented at the American College of Cardiology’s Annual Scientific Session Together With the World Congress of Cardiology. In addition, when looking at sleep duration as an objective measure of insomnia, researchers found that people who clocked five or fewer hours of sleep a night had the greatest risk of experiencing a heart attack. People with ...

Health, not age, driving a rise in pregnancy complications

2023-02-24
Rising rates of adverse pregnancy outcomes, such as hypertensive disorders of pregnancy, preterm birth and low birthweight, over the past 10 years are largely attributable to the health status of a person before they get pregnant, rather than age, according to a study presented at the American College of Cardiology’s Annual Scientific Session Together With the World Congress of Cardiology. The study found that the average age of pregnant individuals rose from 27.9 years in 2011 to 29.1 years in 2019, yet age accounted for only a small portion of the marked increase ...

Technology-assisted pregnancies have twice the risk of preeclampsia

2023-02-24
People who became pregnant using assisted reproductive technologies were found to be over twice as likely to develop preeclampsia than those with traditional pregnancies, according to a study presented at the American College of Cardiology’s Annual Scientific Session Together With the World Congress of Cardiology. The study, based on an analysis of health records from over 2.2 million patients, is the first to assess how reproductive technologies may affect the risk of cardiovascular complications during pregnancy on a national scale. Preeclampsia is a pregnancy-related complication involving new onset high ...

Frequent marijuana use linked to heart disease

2023-02-24
People who used marijuana daily were found to be about one-third more likely to develop coronary artery disease (CAD) compared with people who have never used the drug, according to a study presented at the American College of Cardiology’s Annual Scientific Session Together With the World Congress of Cardiology.        As cannabis becomes legal in an increasing number of U.S. states, this study is among the largest and most comprehensive to date to examine the potential long-term cardiovascular implications of using the drug. CAD is the most common form of heart disease and occurs when the arteries that supply blood to the heart ...

Cognitive behavioral therapy delivered via smartphone app lowers blood sugar, improves health behaviors in patients with diabetes

2023-02-24
People with Type 2 diabetes who were given a smartphone app that delivers personalized cognitive behavioral therapy (CBT) saw significantly greater reductions in their blood sugar and less need for higher doses of diabetes medications at six months compared with those who only received standard diabetes care and a control app, in a study presented at the American College of Cardiology’s Annual Scientific Session Together With the World Congress of Cardiology. A clear “dose effect” was seen, with patients completing more CBT lessons seeing the greatest benefits. “When studied in a large randomized controlled ...

Is the middle Cambrian Brooksella a hexactinellid sponge, trace fossil or pseudofossil?

Is the middle Cambrian Brooksella a hexactinellid sponge,  trace fossil or pseudofossil?
2023-02-24
More than 100 years ago, Charles Doolittle Walcott from the Smithsonian Institution was asked to examine strange star-shaped fossils with lobes hailing from the ~ 514-million-year-old Conasauga Formation in Alabama. Walcott described these odd fossils as jellyfish that likely floated in the middle Cambrian seas of what is now the southeastern United States. Little did he know that the Cambrian fossil he named would cause over 100 years of controversy. The controversy hinged on the interpretation of what Brooksella really was: Was it truly a jellyfish ...

The Biophysical Journal names Carlas S. Smith the 2022 Paper of the Year-Early Career Investigator awardee

The Biophysical Journal names Carlas S. Smith the 2022 Paper of the Year-Early Career Investigator awardee
2023-02-24
ROCKVILLE, MD – Carlas S. Smith, PhD, of Delft University of Technology, the Netherlands was honored as the recipient of the Biophysical Journal Paper of the Year-Early Career Investigator Award at the 67th Annual Meeting of the Biophysical Society, held February 18-22 in San Diego, California. This award recognizes the work of outstanding early career investigators in biophysics. The winning paper is titled “Precision in Iterative Modulation Enhanced Single-Molecule Localization Microscopy.” The paper was published in ...

LAST 30 PRESS RELEASES:

Signs identified that precede sudden arrhythmic death syndrome in young people

Discovery of bacteria's defence against viruses becomes a piece of the puzzle against resistance

Pre-eclampsia is associated with earlier onset and higher incidence of cardiovascular risk factors

Warwick astronomers discover doomed pair of spiralling stars on our cosmic doorstep

Soil conditions significantly increase rainfall in world’s megastorm hotspots

NK cells complexed with bispecific antibody yield high response rates in patients with lymphoma

Planetary health diet and mediterranean diet associated with similar survival and sustainability benefits

Singapore launches national standard to validate antimicrobial disinfectant products

Molecular stool test could improve detection of tuberculosis in adults with HIV

Suspected fibrocartilaginous embolus in Asian small-clawed otter (Aonyx cinereus)

Enhancing heat transfer using the turbulent flow of viscoelastic fluids

Exercise as an anti-ageing intervention to avoid detrimental impact of mental fatigue

UMass Amherst Nursing Professor Emerita honored as ‘Living Legend’

New guidelines aim to improve cystic fibrosis screening

Picky eaters by day, buffet by night: Butterfly, moth diets sync to plant aromas

Pennington Biomedical’s Dr. Leanne Redman honored with the E. V. McCollum Award from the American Society for Nutrition

CCNY physicists uncover electronic interactions mediated via spin waves

Researchers’ 3D-printing formula may transform future of foam

Nurture more important than nature for robotic hand

Drug-delivering aptamers target leukemia stem cells for one-two knockout punch

New study finds that over 95% of sponsored influencer posts on Twitter were not disclosed

New sea grant report helps great lakes fish farmers navigate aquaculture regulations

Strain “trick” improves perovskite solar cells’ efficiency

How GPS helps older drivers stay on the roads

Estrogen and progesterone stimulate the body to make opioids

Dancing with the cells – how acoustically levitating a diamond led to a breakthrough in biotech automation

Machine learning helps construct an evolutionary timeline of bacteria

Cellular regulator of mRNA vaccine revealed... offering new therapeutic options

Animal behavioral diversity at risk in the face of declining biodiversity

Finding their way: GPS ignites independence in older adult drivers

[Press-News.org] Breakthrough in tin-vacancy centers for quantum network applications