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      Circuit quantization in the presence of time-dependent external flux

      , ,
      Physical Review B
      American Physical Society (APS)

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          Superconducting circuits for quantum information: an outlook.

          The performance of superconducting qubits has improved by several orders of magnitude in the past decade. These circuits benefit from the robustness of superconductivity and the Josephson effect, and at present they have not encountered any hard physical limits. However, building an error-corrected information processor with many such qubits will require solving specific architecture problems that constitute a new field of research. For the first time, physicists will have to master quantum error correction to design and operate complex active systems that are dissipative in nature, yet remain coherent indefinitely. We offer a view on some directions for the field and speculate on its future.
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            Physics and Applications of the Josephson Effect

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              Fluxonium: single cooper-pair circuit free of charge offsets.

              The promise of single Cooper-pair quantum circuits based on tunnel junctions for metrology and quantum information applications is severely limited by the influence of offset charges: random, slowly drifting microscopic charges inherent in many solid-state systems. By shunting a small junction with the Josephson kinetic inductance of a series array of large-capacitance tunnel junctions, thereby ensuring that all superconducting islands are connected to the circuit by at least one large junction, we have realized a new superconducting artificial atom that is totally insensitive to offset charges. Yet its energy levels manifest the anharmonic structure associated with single Cooper-pair effects, a useful component for solid-state quantum computation.
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                Author and article information

                Journal
                PRBMDO
                Physical Review B
                Phys. Rev. B
                American Physical Society (APS)
                2469-9950
                2469-9969
                May 2019
                May 21 2019
                : 99
                : 17
                Article
                10.1103/PhysRevB.99.174512
                faa78f17-49a2-47d6-91dc-cc571eab84e9
                © 2019

                https://link.aps.org/licenses/aps-default-license

                https://link.aps.org/licenses/aps-default-accepted-manuscript-license

                History

                Genetics
                Genetics

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