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News Article | September 1, 2016
Site: http://www.scientificcomputing.com/rss-feeds/all/rss.xml/all

Researchers at Aalto University have demonstrated the suitability of microwave signals in the coding of information for quantum computing. Previous development of the field has been focusing on optical systems. Researchers used a microwave resonator based on extremely sensitive measurement devices known as superconductive quantum interference devices (SQUIDs). In their studies, the resonator was cooled down and kept near absolute zero, where any thermal motion freezes. This state corresponds to perfect darkness where no photon - a real particle of electromagnetic radiation such as visible light or microwaves - is present. However, in this state (called quantum vacuum) there exist fluctuations that bring photons in and out of existence for a very short time. The researchers have now managed to convert these fluctuations into real photons of microwave radiation with different frequencies, showing that, in a sense, darkness is more than just absence of light. They also found out that these photons are correlated with each other, as if a magic connection exists between them. 'With our experimental setup we managed to create complex correlations of microwave signals in a controlled way,' says Dr Pasi Lähteenmäki, who performed the research during his doctoral studies at the Low Temperature Laboratory of Aalto University. 'This all hints at the possibility of using the different frequencies for quantum computing. The photons at different frequencies will play a similar role to the registers in classical computers, and logical gate operations can be performed between them,' says Doc. Sorin Paraoanu, Senior University Lecturer and one of the co-authors of the work. The results provide a new approach for quantum computing. 'Today the basic architecture of future quantum computers is being developed very intensively around the world. By utilizing the multi-frequency microwave signals, an alternative approach can be pursued which realizes the logical gates by sequences of quantum measurements. Moreover, if we use the photons created in our resonator, the physical quantum bits or qubits become needless,' explains Professor Pertti Hakonen from the Low Temperature Laboratory of Aalto University.


News Article | September 1, 2016
Site: http://www.scientificcomputing.com/rss-feeds/all/rss.xml/all

Researchers at Aalto University have demonstrated the suitability of microwave signals in the coding of information for quantum computing. Previous development of the field has been focusing on optical systems. Researchers used a microwave resonator based on extremely sensitive measurement devices known as superconductive quantum interference devices (SQUIDs). In their studies, the resonator was cooled down and kept near absolute zero, where any thermal motion freezes. This state corresponds to perfect darkness where no photon - a real particle of electromagnetic radiation such as visible light or microwaves - is present. However, in this state (called quantum vacuum) there exist fluctuations that bring photons in and out of existence for a very short time. The researchers have now managed to convert these fluctuations into real photons of microwave radiation with different frequencies, showing that, in a sense, darkness is more than just absence of light. They also found out that these photons are correlated with each other, as if a magic connection exists between them. 'With our experimental setup we managed to create complex correlations of microwave signals in a controlled way,' says Dr Pasi Lähteenmäki, who performed the research during his doctoral studies at the Low Temperature Laboratory of Aalto University. 'This all hints at the possibility of using the different frequencies for quantum computing. The photons at different frequencies will play a similar role to the registers in classical computers, and logical gate operations can be performed between them,' says Doc. Sorin Paraoanu, Senior University Lecturer and one of the co-authors of the work. The results provide a new approach for quantum computing. 'Today the basic architecture of future quantum computers is being developed very intensively around the world. By utilizing the multi-frequency microwave signals, an alternative approach can be pursued which realizes the logical gates by sequences of quantum measurements. Moreover, if we use the photons created in our resonator, the physical quantum bits or qubits become needless,' explains Professor Pertti Hakonen from the Low Temperature Laboratory of Aalto University.


Helium-3 experimental cell and extract of data showing creation of light Higgs mode (analog of 125 GeV Higgs boson). Credit: Dr. Vladislav Zavyalov, Low Temperature Laboratory, Aalto University In 2012, a proposed observation of the Higgs boson was reported at the Large Hadron Collider in CERN.  The observation has puzzled the physics community, as the mass of the observed particle, 125 GeV, looks lighter than the expected energy scale, about 1 TeV. Researchers at Aalto University in Finland now propose that there is more than one Higgs boson, and they are much heavier than the 2012 observation.  The results were recently published in Nature Communications. "Our recent ultra-low temperature experiments on superfluid helium (3He) suggest an explanation why the Higgs boson observed at CERN appears to be too light.  By using the superfluid helium analogy, we have predicted that there should be other Higgs bosons, which are much heavier (about 1 TeV) than previously observed," says Professor (emeritus) Grigory E. Volovik. Prof. Volovik holds a position in the Low Temperature Laboratory at Aalto University and in Landau Institute, Moscow.  He has received the international Simon Prize in 2004 for distinguished work in theoretical low temperature physics, and the Lars Onsager Prize in 2014 for outstanding research in theoretical statistical physics. At the same time, the new CERN experiments have shown evidence of the second Higgs in just the suggested region (at 0.75 TeV).  This evidence has immediately been commented and discussed in a large number of papers submitted to arXiv, an e-print service widely utilised by the physics community to distribute manuscripts of their unpublished work. Explore further: Hints of the Higgs - papers are submitted More information: V. V. Zavjalov et al. Light Higgs channel of the resonant decay of magnon condensate in superfluid 3He-B, Nature Communications (2016). DOI: 10.1038/NCOMMS10294


News Article | September 1, 2016
Site: http://www.cemag.us/rss-feeds/all/rss.xml/all

Researchers at Aalto University have demonstrated the suitability of microwave signals in the coding of information for quantum computing. Previous development of the field has been focusing on optical systems. Researchers used a microwave resonator based on extremely sensitive measurement devices known as superconductive quantum interference devices (SQUIDs). In their studies, the resonator was cooled down and kept near absolute zero, where any thermal motion freezes. This state corresponds to perfect darkness where no photon — a real particle of electromagnetic radiation such as visible light or microwaves — is present. However, in this state (called quantum vacuum) there exist fluctuations that bring photons in and out of existence for a very short time. The researchers have now managed to convert these fluctuations into real photons of microwave radiation with different frequencies, showing that, in a sense, darkness is more than just absence of light. They also found out that these photons are correlated with each other, as if a magic connection exists between them. “With our experimental setup we managed to create complex correlations of microwave signals in a controlled way,” says Dr. Pasi Lähteenmäki, who performed the research during his doctoral studies at the Low Temperature Laboratory of Aalto University. “This all hints at the possibility of using the different frequencies for quantum computing. The photons at different frequencies will play a similar role to the registers in classical computers, and logical gate operations can be performed between them,” says Dr. Sorin Paraoanu, Senior University Lecturer and one of the co-authors of the work. The results provide a new approach for quantum computing. “Today the basic architecture of future quantum computers is being developed very intensively around the world. By utilizing the multi-frequency microwave signals, an alternative approach can be pursued which realizes the logical gates by sequences of quantum measurements. Moreover, if we use the photons created in our resonator, the physical quantum bits or qubits become needless,” explains Professor Pertti Hakonen from the Low Temperature Laboratory of Aalto University. These experiments utilized the OtaNANO infrastructure and the niobium superconducting technology of the Technical Research Centre of Finland (VTT). This work was done under the framework of the Centre of Quantum Engineering at Aalto University.


Abstract: Researchers at Aalto University have demonstrated the suitability of microwave signals in the coding of information for quantum computing. Previous development of the field has been focusing on optical systems. Researchers used a microwave resonator based on extremely sensitive measurement devices known as superconductive quantum interference devices (SQUIDs). In their studies, the resonator was cooled down and kept near absolute zero, where any thermal motion freezes. This state corresponds to perfect darkness where no photon - a real particle of electromagnetic radiation such as visible light or microwaves - is present. However, in this state (called quantum vacuum) there exist fluctuations that bring photons in and out of existence for a very short time. The researchers have now managed to convert these fluctuations into real photons of microwave radiation with different frequencies, showing that, in a sense, darkness is more than just absence of light. They also found out that these photons are correlated with each other, as if a magic connection exists between them. 'With our experimental setup we managed to create complex correlations of microwave signals in a controlled way,' says Dr Pasi Lähteenmäki, who performed the research during his doctoral studies at the Low Temperature Laboratory of Aalto University. 'This all hints at the possibility of using the different frequencies for quantum computing. The photons at different frequencies will play a similar role to the registers in classical computers, and logical gate operations can be performed between them,' says Doc. Sorin Paraoanu, Senior University Lecturer and one of the co-authors of the work. The results provide a new approach for quantum computing. 'Today the basic architecture of future quantum computers is being developed very intensively around the world. By utilizing the multi-frequency microwave signals, an alternative approach can be pursued which realizes the logical gates by sequences of quantum measurements. Moreover, if we use the photons created in our resonator, the physical quantum bits or qubits become needless,' explains Professor Pertti Hakonen from the Low Temperature Laboratory of Aalto University. These experiments utilized the OtaNANO infrastructure and the niobium superconducting technology of the Technical Research Centre of Finland (VTT). This work was done under the framework of the Centre of Quantum Engineering at Aalto University. For more information, please click If you have a comment, please us. Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

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