Sign- and Magnitude-Tunable Coupler for Superconducting Flux Qubits
| Autor: | Mark W. Johnson, J. Chung, Murray C. Thom, A. Yu. Smirnov, Paul I. Bunyk, Andrew J. Berkley, Alec Maassen van den Brink, Jacob Biamonte, Elliot Holtham, Richard Harris, Sergey Uchaikin, A. B. Wilson, S. Govorkov, Mohammad H. Amin |
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| Rok vydání: | 2007 |
| Předmět: |
Physics
Coupling Superconductivity Quantum Physics Flux qubit Condensed matter physics Condensed Matter - Superconductivity FOS: Physical sciences General Physics and Astronomy Magnetic field Superconductivity (cond-mat.supr-con) Computer Science::Emerging Technologies Qubit Quantum Physics (quant-ph) Ground state Superconducting quantum computing Sign (mathematics) |
| Zdroj: | Physical Review Letters. 98 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.98.177001 |
| Popis: | We experimentally confirm the functionality of a coupling element for flux-based superconducting qubits, with a coupling strength $J$ whose sign and magnitude can be tuned {\it in situ}. To measure the effective $J$, the groundstate of a coupled two-qubit system has been mapped as a function of the local magnetic fields applied to each qubit. The state of the system is determined by directly reading out the individual qubits while tunneling is suppressed. These measurements demonstrate that $J$ can be tuned from antiferromagnetic through zero to ferromagnetic. Updated text and figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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