Variable Electrostatic Transformer: Controllable Coupling of Two Charge Qubits
نویسندگان
چکیده
منابع مشابه
Variable electrostatic transformer: controllable coupling of two charge qubits.
We propose and investigate a novel method for the controlled coupling of two Josephson charge qubits by means of a variable electrostatic transformer. The value of the coupling capacitance is given by the discretized curvature of the lowest energy band of a Josephson junction, which can be positive, negative, or zero. We calculate the charging diagram of the two-qubit system that reflects the t...
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YU. A. PASHKIN, T. TILMA, D. V. AVERIN, O. ASTAFIEV, T. YAMAMOTO, Y. NAKAMURA, F. NORI and J. S. TSAI The Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako, Saitama 305-0198, Japan Department of Physics and Astronomy, Stony Brook University, SUNY Stony Brook, NY 11794, USA NEC Fundamental Research Laboratories, 34 Miyukigaoka, Tsukuba, Ibaraki 305-8501, Japan Department of...
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J. Q. You, J. S. Tsai, and Franco Nori* Frontier Research System, The Institute of Physical and Chemical Research (RIKEN), Wako-shi 351-0198, Japan NEC Fundamental Research Laboratories, Tsukuba, Ibaraki 305-8051, Japan Center for Theoretical Physics, Physics Department, Center for the Study of Complex Systems, The University of Michigan, Ann Arbor, Michigan 48109-1120, USA ~Received 25 Februar...
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Universal multiple-qubit gates can be implemented by a set of universal single-qubit gates and any one kind of entangling two-qubit gate, such as a controlled-NOT gate. For semiconductor quantum dot qubits, two-qubit gate operations have so far only been demonstrated in individual electron spin-based quantum dot systems. Here we demonstrate the conditional rotation of two capacitively coupled c...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2003
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.91.057003