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Institute of Electrical and Electronics Engineers, IEEE Transactions on Applied Superconductivity, 3(19), p. 953-956, 2009

DOI: 10.1109/tasc.2009.2018083

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A Controllable Interaction between Two-Level Systems inside a Josephson Junction

Journal article published in 2009 by Lin Tian ORCID, Kurt Jacobs
This paper is available in a repository.
This paper is available in a repository.

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Abstract

Two-level system fluctuators (TLS's) in the tunnel barrier of a Josephson junction have recently been demonstrated to cause novel energy splittings in spectroscopic measurements of superconducting phase qubits. With their strong coupling to the Josephson junction and relatively long decoherence times, TLS's can be considered as potential qubits and demonstrate coherent quantum effects. Here, we study the effective interaction between the TLS qubits that is mediated by a Josephson junction resonator driven by an external microwave source. This effective interaction can enable controlled quantum logic gates between the TLS's. Our study can be extended to other superconducting resonators coupling with TLS's. ; Comment: 4 pages, 2 figures, ASC conference 2008