Abstract
We propose a scheme to implement controllable coupling between two flux qubits using the screening current response of a dc superconducting quantum interference device (SQUID). The coupling strength is adjusted by the current bias applied to the SQUID and can be varied continuously from positive to negative values, allowing cancellation of the direct mutual inductance between the qubits. We show that this variable coupling scheme permits efficient realization of universal quantum logic. The same SQUID can be used to determine the flux states of the qubits.
| Original language | English (US) |
|---|---|
| Article number | 140501(R) |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 70 |
| Issue number | 14 |
| DOIs | |
| State | Published - Oct 2004 |
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ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Entangling flux qubits with a bipolar dynamic inductance. / Plourde, Britton; Zhang, J.; Whaley, K. B.; Wilhelm, F. K.; Robertson, T. L.; Hime, T.; Linzen, S.; Reichardt, P. A.; Wu, C. E.; Clarke, John.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 70, No. 14, 140501(R), 10.2004.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Entangling flux qubits with a bipolar dynamic inductance
AU - Plourde, Britton
AU - Zhang, J.
AU - Whaley, K. B.
AU - Wilhelm, F. K.
AU - Robertson, T. L.
AU - Hime, T.
AU - Linzen, S.
AU - Reichardt, P. A.
AU - Wu, C. E.
AU - Clarke, John
PY - 2004/10
Y1 - 2004/10
N2 - We propose a scheme to implement controllable coupling between two flux qubits using the screening current response of a dc superconducting quantum interference device (SQUID). The coupling strength is adjusted by the current bias applied to the SQUID and can be varied continuously from positive to negative values, allowing cancellation of the direct mutual inductance between the qubits. We show that this variable coupling scheme permits efficient realization of universal quantum logic. The same SQUID can be used to determine the flux states of the qubits.
AB - We propose a scheme to implement controllable coupling between two flux qubits using the screening current response of a dc superconducting quantum interference device (SQUID). The coupling strength is adjusted by the current bias applied to the SQUID and can be varied continuously from positive to negative values, allowing cancellation of the direct mutual inductance between the qubits. We show that this variable coupling scheme permits efficient realization of universal quantum logic. The same SQUID can be used to determine the flux states of the qubits.
UR - http://www.scopus.com/inward/record.url?scp=19944414920&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=19944414920&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.70.140501
DO - 10.1103/PhysRevB.70.140501
M3 - Article
AN - SCOPUS:19944414920
VL - 70
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 0163-1829
IS - 14
M1 - 140501(R)
ER -