A new, updated account of poroid fungi in North America
Poroid fungi, commonly known as "polypores," are among the most frequently encountered fungi throughout the year because of their large ...
![\"Image](\"https:\/\/bioengineer.org\/wp-content\/uploads\/2023\/05\/Quantum-scientists-accurately-measure-power-levels-one-trillion-times-lower.png\")
<\/p>\nScientists in Finland have developed a nanodevice that can measure the absolute power of microwave radiation down to the femtowatt level at ultra-low temperatures \u2013 a scale trillion times lower than routinely used in verifiable power measurements. The device has the potential to significantly advance microwave measurements in quantum technology.\u00a0\u00a0<\/p>\n
<\/p>\n
Credit: Jean-Philippe Girard\/Aalto University<\/p>\n
<\/p>\n
Scientists in Finland have developed a nanodevice that can measure the absolute power of microwave radiation down to the femtowatt level at ultra-low temperatures \u2013 a scale trillion times lower than routinely used in verifiable power measurements. The device has the potential to significantly advance microwave measurements in quantum technology.\u00a0\u00a0<\/p>\n
\u00a0<\/p>\n
Measuring extremely low power<\/strong>\u00a0<\/p>\n Quantum science takes place mostly at ultra-low temperatures using devices called dilution refrigerators. The experiments also have to be done at tiny energy levels \u2013 down to the energy level of single photons or even less. Researchers have to measure these extremely low energy levels as accurately as possible, which means also accounting for heat \u2013 a persistent problem for quantum devices.\u00a0<\/p>\n To measure heat in quantum experiments, scientists use a special type of thermometer called a bolometer. An exceptionally accurate bolometer was recently developed<\/u> at Aalto by a team led by Mikko M\u00f6tt\u00f6nen<\/strong>, associate professor of quantum technology at Aalto and VTT, but the device had more uncertainty than they had hoped for. Although it enabled them to observe the relative power level, they couldn\u2019t determine the absolute amount of energy very accurately.\u00a0<\/p>\n In the new study, M\u00f6tt\u00f6nen\u2019s team worked with researchers at the quantum-technology companies Bluefors and IQM, and VTT Technical Research Centre of Finland to improve the bolometer. The work was published today as the Editor\u2019s Pick in the Review of Scientific Instruments: <\/em>https:\/\/doi.org\/10.1063\/5.0143761<\/strong>\u00a0<\/p>\n \u2018We added a heater to the bolometer, so we can apply a known heater current and measure the voltage. Since we know the precise amount of power we\u2019re putting into the heater, we can calibrate the power of the input radiation against the heater power. The result is a self-calibrating bolometer working at low temperatures, which allows us to accurately measure absolute powers at cryogenic temperatures,\u2019 M\u00f6tt\u00f6nen says.\u00a0<\/p>\n According to Russell Lake<\/strong>, director of quantum applications at Bluefors, the new bolometer is a significant step forward in measuring microwave power.\u00a0\u00a0<\/p>\n \u2018Commercial power sensors typically measure power at the scale of one milliwatt. This bolometer does that accurately and reliably at one femtowatt or below. That\u2019s a trillion times less power than used in typical power calibrations.\u2019\u00a0<\/p>\n Covering both deep and wide scales<\/strong>\u00a0<\/p>\n M\u00f6tt\u00f6nen explains that the new bolometer could improve the performance of quantum computers. \u2018For accurate results, the measurement lines used to control qubits should be at very low temperatures, void of any thermal photons and excess radiation. Now with this bolometer, we can actually measure that radiation temperature without interference from the qubit circuitry,\u2019 he says.\u00a0<\/p>\n The bolometer also covers a very broad range of frequencies.\u00a0\u00a0<\/p>\n \u2018The sensor is broadband, which means that it can measure what is the power absorbed in various frequencies. This is not a given in quantum technology as usually the sensors are limited to a very narrow band,\u2019 says Jean-Philippe Girard<\/strong>, a scientist at Bluefors who also previously worked at Aalto on the device.\u00a0<\/p>\n The team says the bolometer provides a major boost to quantum technology fields.\u00a0\u00a0<\/p>\n \u2018Measuring microwaves happens in wireless communications, radar technology, and many other fields. They have their ways of performing accurate measurements, but there was no way to do the same when measuring very weak microwave signals for quantum technology. The bolometer is an advanced diagnostic instrument that has been missing from the quantum technology toolbox until now,\u2019 Lake says.\u00a0<\/p>\n The work is a result of seamless collaboration between Aalto University and Bluefors, a perfect example of academy and industry complementing each other\u2019s strengths. The device was developed at Aalto\u2019s Quantum Computing and Devices (QCD) group, which is part of the Academy of Finland Centre of Excellence in Quantum Technology (QTF). They used Micronova cleanrooms that belong to the national research infrastructure OtaNano. Since the first experiments at Aalto, Bluefors has also successfully tested these devices in their own industrial facilities.\u00a0\u00a0<\/p>\n \u2018That shows that this is not just a lucky break in a university lab, but something that both the industrial and the academic professionals working in quantum technology can benefit from,\u2019 M\u00f6tt\u00f6nen says.\u00a0<\/p>\n \u00a0<\/p>\n Review of Scientific Instruments<\/p>\n<\/p><\/div>\n 10.1063\/5.0143761 <\/i><\/p>\n<\/p><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":" Scientists in Finland have developed a nanodevice that can measure the absolute power of microwave radiation down to the femtowatt level at ultra-low temperatures \u2013 a scale trillion times lower than routinely used in verifiable power measurements. The device has the potential to significantly advance microwave measurements in quantum technology.\u00a0\u00a0 Credit: Jean-Philippe Girard\/Aalto University Scientists […]<\/p>\n","protected":false},"author":8,"featured_media":206523,"comment_status":"","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jnews-multi-image_gallery":[],"jnews_single_post":[],"jnews_primary_category":[],"jnews_override_bookmark_settings":[],"jnews_social_meta":[],"jnews_review":[],"enable_review":"","type":"","name":"","summary":"","brand":"","sku":"","good":[],"bad":[],"score_override":"","override_value":"","rating":[],"price":[],"jnews_override_counter":[],"footnotes":""},"categories":[237],"tags":[],"class_list":["post-206522","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-chemistry"],"_links":{"self":[{"href":"https:\/\/bioengineer.org\/wp-json\/wp\/v2\/posts\/206522","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bioengineer.org\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bioengineer.org\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bioengineer.org\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/bioengineer.org\/wp-json\/wp\/v2\/comments?post=206522"}],"version-history":[{"count":0,"href":"https:\/\/bioengineer.org\/wp-json\/wp\/v2\/posts\/206522\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bioengineer.org\/wp-json\/wp\/v2\/media\/206523"}],"wp:attachment":[{"href":"https:\/\/bioengineer.org\/wp-json\/wp\/v2\/media?parent=206522"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bioengineer.org\/wp-json\/wp\/v2\/categories?post=206522"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bioengineer.org\/wp-json\/wp\/v2\/tags?post=206522"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Poroid fungi, commonly known as "polypores," are among the most frequently encountered fungi throughout the year because of their large ... A study of more than 200,000 tweets from 2019 and 2020 finds that anti-immigration content spreads faster than pro-immigration tweets ... Over the past 12,000 years, humans in Europe have dramatically increased their ability to digest carbohydrates, expanding the number of ... As dogs age, their owner-assessed quality of life predictably declines, with higher mortality seen at quality of life below 76% ... Samples from bottled water, tap water and household-treated tap water in San Francisco Bay Area indicate that all sources may ... Young male northern elephant seals are captured on camera returning to a deep sea cabled observatory off Canada's British Columbia ... Although more common in dogs, 4 in 10 pet cats also choose to play fetch with their owners, Mikel Delgado ... Four faculty members from three departments in the College of Natural Resources and Environment have received $1.7 million from the ... LAWRENCE — A new book of natural history essays co-written by a University of Kansas paleontologist has been published by Columbia ... The first sign of spoilage in many food products is the formation of free radicals, which reduces the shelf-life and ... LOS ANGELES — Oncology specialists at City of Hope®, one of the largest and most advanced cancer research and treatment ... Neurosurgery is perhaps one of the most demanding professions in healthcare. Surgeons spend long hours performing operations where expert performance ... VANCOUVER, Wash. – Some of the butterflies most in danger of fluttering out of existence fare better when their habitats ... Because of their special properties – heat resistance, water and grease repellence, and high durability – PFAS are used in ...
\n
\n\n\n\nJournal<\/h4>\n
\nDOI<\/h4>\n
A new, updated account of poroid fungi in North America
Few anti-immigration users dominate most of UK-based anti-immigration content on Twitter with rapid spread and high polarization
Agriculture accelerated human genome evolution to capture energy from starchy foods
As dogs age, their owner-assessed quality of life predictably declines, with higher mortality seen at quality of life below 76% of the maximum score – though many dogs have high quality of life even when at predicted lifespan
Samples from bottled water, tap water and household-treated tap water in San Francisco Bay Area indicate that all sources may have potential health risks, largely from trihalomethanes
Young male northern elephant seals are captured on camera returning to a deep sea cabled observatory off Canada’s British Columbia coast, demonstrating new insight into fish foraging behavior
Both cats and dogs often enjoy playing fetch with their owners
Collaborative research to benefit coastal flounder populations and fishers
New book ‘Macroevolutionaries’ explores intersection of evolution, art and popular culture
SpinMagIC: ‘EPR on a chip’ ensures quality of olive oil and beer
City of Hope to offer second opinions for cancer patients in Southeast Asia via a collaboration agreement with the Healthway Cancer Care Hospital
A new role for intelligent tutors powered by AI in brain surgery?
At-risk butterflies more likely to survive with human help
PFAS influence the development and function of the brain
POPULAR NEWS
NYU Abu Dhabi researchers identify unique survival strategies adopted by fish in the world’s warmest waters
CHOP experts describe types of rashes associated with MIS-C
Microbial Nanowires
Scientists discover that a protein associated with neurodegenerative diseases is also linked to childhood brain cancer