Solid-State Qubits with Current-Controlled Coupling

Solid-State Qubits with Current-Controlled Coupling

The ability to switch the coupling between quantum bits (qubits) on and off is essential for implementing many quantum-computing algorithms. We demonstrated such control with two flux qubits coupled together through their mutual inductances and through the dc superconducting quantum interference dev...

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Veröffentlicht in:Science (American Association for the Advancement of Science) 2006-12, Vol.314 (5804), p.1427-1429
Hauptverfasser: Hime, T, Reichardt, P.A, Plourde, B.L.T, Robertson, T.L, Wu, C.-E, Ustinov, A.V, Clarke, John
Format: Artikel
Sprache:eng
Schlagworte:
Algorithms
Applied sciences
Architecture
Classical and quantum physics: mechanics and fields
Critical current
Direct current
Electric current
Electronics
Exact sciences and technology
Flux
Ground state
Inductance
Joining
Magnetic flux
Microwaves
Physics
Quantum computation
Quantum information
Quantum states
Quantum theory
Qubits (quantum computing)
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
SQUIDs
Superconducting devices
Superconducting quantum interference devices
Superconductors
Switches
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Beschreibung
Zusammenfassung:The ability to switch the coupling between quantum bits (qubits) on and off is essential for implementing many quantum-computing algorithms. We demonstrated such control with two flux qubits coupled together through their mutual inductances and through the dc superconducting quantum interference device (SQUID) that reads out their magnetic flux states. A bias current applied to the SQUID in the zero-voltage state induced a change in the dynamic inductance, reducing the coupling energy controllably to zero and reversing its sign.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.1134388