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Physics - An Optical System Defies Conventional Band Theory


An Optical System Defies Conventional Band Theory
June 10, 2021•
Physics 14, s70
Squeezed wave functions reshape an open quantum system’s bulk-boundary properties and generate a new class of parity-time symmetry.
L. Xiao
L. Xiao
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Quantum systems that obey parity-time symmetry exhibit “exceptional points” within their parameter space. In quantum optical systems, these are points where a light beam’s energy gains and losses are perfectly balanced, leading to rich critical phenomena, such as extreme sensitivity to external parameters. Parity-time symmetry can be engineered into systems via designs that ensure a balance of inward and outward energy flows (see Viewpoint:
PT Symmetry Goes Quantum). Now, Lei Xiao, at Beijing Computational Science Research Center, and colleagues demonstrate a new way to produce both parity-time symmetry and exceptional points in a quantum-optical circuit. Their study could allow tools for tuning exotic ....

British Columbia , Rachel Berkowitz , Computational Science Research Center , Goes Quantum , Lei Xiao , Beijing Computational Science Research Center , Corresponding Editor , பிரிட்டிஷ் கொலம்பியா , ரேச்சல் பெர்கோவிட்ஸ் , கணக்கீட்டு அறிவியல் ஆராய்ச்சி மையம் , லீ கிஷியஓ , பெய்ஜிங் கணக்கீட்டு அறிவியல் ஆராய்ச்சி மையம் ,

Indian engineering student gets 25 international research offers - www.indianweekender.co.nz


Indian engineering student gets 25 international research offers
Friday, April 2, 2021
IWK Bureau
The Covid pandemic has affected education all over the globe, but in midst of all this disruption, an Indian mechanical engineering student has drawn over two dozen research offers in both sciences and mathematics from top institutions in the US, the UK, Europe and elsewhere.
This is apart from the offers from leading Indian institutions, with many of which he has already collaborated on several key projects.
It is a rarity for students to receive research offers in both sciences and mathematics, but Abhishek Agrahari, 21, is one of the ones to qualify in this regard. ....

United Kingdom , University Of Adelaide , South Australia , Tamil Nadu , West Bengal , Uttar Pradesh , South Korea , Madhya Pradesh , City Of , Abhishek Agrahari , Technical University Of Munich Germany , Chinese University Of Hong Kong , University Of Illinois , Shanghai Jia Tong University , Computational Sciences Research Center , Australian National University , University Of Oxford , Gyeongsang National University , Pennsylvania State University , Australian School Of Petroleum , University Of Ferrara , Defence Research , Budapest University Of Technology , University Of Miami , Lithuanian Energy Institute , Development Organisation ,

Indian engineering student gets 25 international research offers


Indian engineering student gets 25 international research offers
​ By
IANS
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Published on
​ Thu, Apr 1 2021 18:27 IST
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Job. (File Photo: IANS). Image Source: IANS News
New Delhi, April 1 : The Covid pandemic has affected education all over the globe, but in midst of all this disruption, an Indian mechanical engineering student has drawn over two dozen research offers in both sciences and mathematics from top institutions in the US, the UK, Europe and elsewhere.
This is apart from the offers from leading Indian institutions, with many of which he has already collaborated on several key projects.
It is a rarity for students to receive research offers in both sciences and mathematics, but Abhishek Agrahari, 21, is one of the ones to qualify in this regard. ....

United Kingdom , New Delhi , University Of Adelaide , South Australia , Tamil Nadu , West Bengal , Uttar Pradesh , South Korea , City Of , Madhya Pradesh , Abhishek Agrahari , Technical University Of Munich Germany , Chinese University Of Hong Kong , University Of Illinois , Shanghai Jia Tong University , Computational Sciences Research Center , Australian National University , University Of Oxford , Gyeongsang National University , Pennsylvania State University , Australian School Of Petroleum , University Of Ferrara , Defence Research , Budapest University Of Technology , University Of Miami , Lithuanian Energy Institute ,

Predicting future mamalian hosts of SARS-CoV-2


Predicting future mamalian hosts of SARS-CoV-2
Coronaviruses can infect both animals and humans. Coronavirus infections are common, and some strains are zoonotic, which means they can be transmitted between animals and humans.
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the virus that causes the coronavirus disease (COVID-19), emerged in Wuhan City, China, in late December 2019. Though the exact animal reservoir of the virus is yet to be identified, scientists believe the virus came from a horseshoe bat and jumped to an intermediate host before making its way to the human population.
Researchers at the Beijing Computational Science Research Center and Peking University analyzed sequences of the angiotensin-converting enzyme 2 (ACE2) proteins from 16 mammals and predicted the structures of ACE2- receptor-binding domain (RBD) complexes. ....

Angela Betsaidab Laguipo , Computational Science Research Center , Angela Betsaida , Wuhan City , Beijing Computational Science Research Center , Peking University , West Nile , Middle East , Chinese Horseshoe , Least Horseshoe , கணக்கீட்டு அறிவியல் ஆராய்ச்சி மையம் , பெய்ஜிங் கணக்கீட்டு அறிவியல் ஆராய்ச்சி மையம் , பேகிங் பல்கலைக்கழகம் , மேற்கு நைல் , நடுத்தர கிழக்கு , சீன குதிரைவாலி , குறைந்தது குதிரைவாலி ,

Graphene gets a bandgap for opto-electronics


Graphene gets a bandgap for opto-electronics
While graphene has some amazing physical, optical and mechanical properties, its lack of a natural bandgap limits its use in electronics.
Methods of varying complexity have been found to add bandgaps, and now there is another tool in the box – a chemical whose molecules self-assemble into an evenly-spaced flat lattice as they bond down into the graphene and give it a bandgap through sp2 to sp3 hybridisation.
Self-spacing is important, as it removes the fiddly task of externally guiding molecules into position to control the combined material’s electronic properties.
This “research is rather fundamental but could have repercussions over the next few years in optoelectronics, such as in the fabrication of photodetectors or in the field of solar energy”, according to Professor Federico Rosei of the Institut national de la recherche scientifique (INRS) in Canada, which was part of the academic consortium. ....

City Of , United Kingdom , King College London , Harbin Institute Of Technology , Shanghai Advanced Research Institute , Computational Science Research Center , Xiamen University , Jianghan University , Denmark Aarhus University , Federico Rosei , Harbin Institute , Beijing Computational Science Research Center , College London , நகரம் ஆஃப் , ஒன்றுபட்டது கிஂக்டம் , கிங் கல்லூரி லண்டன் , ஹார்பின் நிறுவனம் ஆஃப் தொழில்நுட்பம் , கணக்கீட்டு அறிவியல் ஆராய்ச்சி மையம் , டென்மார்க் ஆர்ஹஸ் பல்கலைக்கழகம் , ஹார்பின் நிறுவனம் , பெய்ஜிங் கணக்கீட்டு அறிவியல் ஆராய்ச்சி மையம் , கல்லூரி லண்டன் ,