Colors from Darkness: Researchers Develop Alternative Approach to Quantum Computing
August 31, 2016 | Aalto UniversityEstimated reading time: 1 minute
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.
Suggested Items
A Review of the 2024 Del Mar Electronics and Manufacturing Show
05/16/2024 | Barry Matties, I-Connect007The Del Mar Electronics and Manufacturing Show (DMEMS) in Del Mar, California, recently took place at an unlikely venue: the Del Mar Fairgrounds. Doug Bodenstab, founder and show organizer, says the show covers everything in electronics manufacturing: design tools, components, base materials, training, testing, board fabrication, AI, data analytics, and more. While you can find about anything online these days, Bodenstab adds that there is no substitute for meeting people in person.
IPC Raymond E. Pritchard Hall of Fame Award: Pierre-Jean Albrieux
05/10/2024 | Marcy LaRont, PCB007 MagazineCongratulations to Pierre-Jean Albrieux, who received the 2024 IPC Raymond E. Pritchard Hall of Fame Award. The award is given to individuals in recognition of the highest level of achievement, extraordinary contributions, and distinguished service to IPC and toward the advancement of the industry, including helping to create a spirit of mutual esteem, respect, and recognition among members consistent with the goals and mission of IPC.
Ansys’ Collaboration with Schrödinger will Accelerate Materials Development with Unprecedented Multiscale Simulation
05/09/2024 | ANSYSAnsys and Schrödinger are collaborating to deliver an ICME approach that bridges the gap between materials discovery and product development.
Seeking Employment: Palash Pranav Vyas
05/03/2024 | Barry Matties, I-Connect007Despite skilled worker shortages across the industry, there are many educated and qualified individuals ready to contribute to electronics manufacturing. Here we profile Palash Pranav Vyas, a Ph.D. candidate at Auburn University whose work in drop shock reliability won him Best Student Poster at IPC APEX EXPO 2024.
Mycronic Releases Interim Report January–March 2024
04/18/2024 | MycronicNet sales increased 39 percent to SEK 1,692 (1,219) million. Based on constant exchange rates, net sales increased 42 percent.