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Researchers develop new tool for analyzing large superconducting circuits: Method could help push forward the field of quantum computing -- ScienceDaily

Science News from research organizations 1 . 2 . Researchers develop new tool for analyzing large superconducting circuits . Method could help push forward the field of quantum computing . Date: September 13, 2021 Source: Northwestern University Summary: New research tools are needed to fully develop quantum computers and advance the field. Now researchers have developed and tested a theoretical tool for analyzing large superconducting circuits. These circuits use superconducting quantum bits, the smallest units of a quantum computer, to store information. Circuit size is important since protection from detrimental noise tends to come at the cost of increased circuit complexity. Currently there are few tools that tackle the modeling of large circuits. Share: FULL STORY The next generation of computing and information processing lies in the intriguing world of quantum mechanics. Quantum computers are expected to be capable of solving large, extremely complex problems that are beyond the capacity of today's most powerful supercomputers. advertisement New research tools are needed to advance the field and fully develop quantum computers. Now Northwestern University researchers have developed and tested a theoretical tool for analyzing large superconducting circuits. These circuits use superconducting quantum bits, or qubits, the smallest units of a quantum computer, to store information. Circuit size is important since protection from detrimental noise tends to come at the cost of increased circuit complexity. Currently there are few tools that tackle the modeling of large circuits, making the Northwestern method an important contribution to the research community. "Our framework is inspired by methods originally developed for the study of electrons in crystals and allows us to obtain quantitative predictions for circuits that were previously hard or impossible to access," said Daniel Weiss, corresponding and first author of the paper. He is a fourth-year graduate student in the research group of Jens Koch, an expert in superconducting qubits. Koch, an associate professor of physics and astronomy in Weinberg College of Arts and Sciences, is a member of the Superconducting Quantum Materials and Systems Center (SQMS) and the Co-design Center for Quantum Advantage (C 2 QA). Both national centers were established last yearby the U.S. Department of Energy (DOE). SQMSis focused on building and deploying a beyond-state-of-the-art quantum computer based on superconducting technologies. C 2 QA is building the fundamental tools necessary to create scalable, distributed and fault-tolerant quantum computer systems. "We are excited to contribute to the missions pursued by these two DOE centers and to add to Northwestern's visibility in the field of quantum information science," Koch said. In their study, the Northwestern researchers illustrate the use of their theoretical tool by extracting from a protected circuit quantitative information that was unobtainable using standard techniques. Details were published today (Sept. 13) in the open access journal Physical Review Research . The researchers specifically studied protected qubits. These qubits are protected from detrimental noise by designand could yield coherence times (how long quantum information is retained) that are much longer than current state-of-the-art qubits. These superconducting circuits are necessarily large, and the Northwestern tool is a means for quantifying the behavior of these circuits. There are some existing tools that can analyze large superconducting circuits, but each works well only when certain conditions are met. The Northwestern method is complementary and works well when these other tools may give suboptimal results. make a difference: sponsored opportunity Story Source: Materials provided by Northwestern University . Original written by Megan Fellman. Note: Content may be edited for style and length. Journal Reference : D. K. Weiss, Wade DeGottardi, Jens Koch, D. G. Ferguson. Variational tight-binding method for simulating large superconducting circuits . Physical Review Research , 2021; 3 (3) DOI: 10.1103/PhysRevResearch.3.033244 . Cite This Page : MLA . APA . Chicago . Northwestern University. "Researchers develop new tool for analyzing large superconducting circuits: Method could help push forward the field of quantum computing." ScienceDaily. ScienceDaily, 13 September 2021. . Northwestern University. (2021, September 13). Researchers develop new tool for analyzing large superconducting circuits: Method could help push forward the field of quantum computing. ScienceDaily . Retrieved September 14, 2021 from www.sciencedaily.com/releases/2021/09/210913135805.htm Northwestern University. "Researchers develop new tool for analyzing large superconducting circuits: Method could help push forward the field of quantum computing." ScienceDaily. www.sciencedaily.com/releases/2021/09/210913135805.htm (accessed September 14, 2021). RELATED TOPICS Matter & Energy Quantum Physics . Quantum Computing . Physics . Spintronics . Computers & Math Quantum Computers . Computers and Internet . Spintronics Research . Encryption . advertisement RELATED TERMS Quantum computer . Circuit design . Quantum number . Quantum entanglement . Nanowire . Bose-Einstein condensate . Physics . Quantum tunnelling . 1 . 2 . 3 . 4 . 5 . RELATED STORIES First Proof of Quantum Computer Advantage . Oct. 18, 2018 ? Quantum computers promise to revolutionize the future of computing. Scientists have now demonstrated for the first time that quantum computers do indeed offer advantages over conventional computers. ... Researchers Develop Data Bus for Quantum Computer . Nov. 6, 2017 ? The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists have developed a ... Toward Mass-Producible Quantum Computers . May 26, 2017 ? Mass-producible quantum computers are closer than ever, thanks to new research. This process for positioning quantum bits in diamond optical circuits could work at large scales, say ... Further Improvement of Qubit Lifetime for Future Quantum Computers . Dec. 8, 2016 ? An international team of scientists has succeeded in making further improvements to the lifetime of superconducting quantum circuits. An important prerequisite for the realization of high-performance ... 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