Cotunneling in pairs of coupled flux qubits

T. Lanting, R. Harris, J. Johansson, M. H S Amin, A. J. Berkley, S. Gildert, M. W. Johnson, P. Bunyk, E. Tolkacheva, E. Ladizinsky, N. Ladizinsky, T. Oh, I. Perminov, E. M. Chapple, C. Enderud, C. Rich, B. Wilson, M. C. Thom, S. Uchaikin, G. Rose

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We report measurements of macroscopic resonant tunneling between the two lowest energy states of a pair of magnetically coupled rf-superconducting quantum interference device flux qubits. This technique provides both a direct means of measuring the energy gap of the two-qubit system and a method for probing of the environment coupled to the pair of qubits. Measurements of the tunneling rate as a function of qubit flux bias show a Gaussian line shape that is well matched to theoretical predictions. Moreover, the peak widths indicate that each qubit is coupled to a local environment whose fluctuations are uncorrelated with that of the other qubit.

Original languageEnglish
Article number060512
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume82
Issue number6
DOIs
Publication statusPublished - 23 Aug 2010

Fingerprint

Fluxes
Resonant tunneling
SQUIDs
Electron energy levels
Energy gap
resonant tunneling
line shape
interference
predictions
energy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Lanting, T., Harris, R., Johansson, J., Amin, M. H. S., Berkley, A. J., Gildert, S., ... Rose, G. (2010). Cotunneling in pairs of coupled flux qubits. Physical Review B - Condensed Matter and Materials Physics, 82(6), [060512]. https://doi.org/10.1103/PhysRevB.82.060512

Cotunneling in pairs of coupled flux qubits. / Lanting, T.; Harris, R.; Johansson, J.; Amin, M. H S; Berkley, A. J.; Gildert, S.; Johnson, M. W.; Bunyk, P.; Tolkacheva, E.; Ladizinsky, E.; Ladizinsky, N.; Oh, T.; Perminov, I.; Chapple, E. M.; Enderud, C.; Rich, C.; Wilson, B.; Thom, M. C.; Uchaikin, S.; Rose, G.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 82, No. 6, 060512, 23.08.2010.

Research output: Contribution to journalArticle

Lanting, T, Harris, R, Johansson, J, Amin, MHS, Berkley, AJ, Gildert, S, Johnson, MW, Bunyk, P, Tolkacheva, E, Ladizinsky, E, Ladizinsky, N, Oh, T, Perminov, I, Chapple, EM, Enderud, C, Rich, C, Wilson, B, Thom, MC, Uchaikin, S & Rose, G 2010, 'Cotunneling in pairs of coupled flux qubits', Physical Review B - Condensed Matter and Materials Physics, vol. 82, no. 6, 060512. https://doi.org/10.1103/PhysRevB.82.060512
Lanting T, Harris R, Johansson J, Amin MHS, Berkley AJ, Gildert S et al. Cotunneling in pairs of coupled flux qubits. Physical Review B - Condensed Matter and Materials Physics. 2010 Aug 23;82(6). 060512. https://doi.org/10.1103/PhysRevB.82.060512
Lanting, T. ; Harris, R. ; Johansson, J. ; Amin, M. H S ; Berkley, A. J. ; Gildert, S. ; Johnson, M. W. ; Bunyk, P. ; Tolkacheva, E. ; Ladizinsky, E. ; Ladizinsky, N. ; Oh, T. ; Perminov, I. ; Chapple, E. M. ; Enderud, C. ; Rich, C. ; Wilson, B. ; Thom, M. C. ; Uchaikin, S. ; Rose, G. / Cotunneling in pairs of coupled flux qubits. In: Physical Review B - Condensed Matter and Materials Physics. 2010 ; Vol. 82, No. 6.
@article{8dcfc517b4b64c469fd21f25aaae78a2,
title = "Cotunneling in pairs of coupled flux qubits",
abstract = "We report measurements of macroscopic resonant tunneling between the two lowest energy states of a pair of magnetically coupled rf-superconducting quantum interference device flux qubits. This technique provides both a direct means of measuring the energy gap of the two-qubit system and a method for probing of the environment coupled to the pair of qubits. Measurements of the tunneling rate as a function of qubit flux bias show a Gaussian line shape that is well matched to theoretical predictions. Moreover, the peak widths indicate that each qubit is coupled to a local environment whose fluctuations are uncorrelated with that of the other qubit.",
author = "T. Lanting and R. Harris and J. Johansson and Amin, {M. H S} and Berkley, {A. J.} and S. Gildert and Johnson, {M. W.} and P. Bunyk and E. Tolkacheva and E. Ladizinsky and N. Ladizinsky and T. Oh and I. Perminov and Chapple, {E. M.} and C. Enderud and C. Rich and B. Wilson and Thom, {M. C.} and S. Uchaikin and G. Rose",
year = "2010",
month = "8",
day = "23",
doi = "10.1103/PhysRevB.82.060512",
language = "English",
volume = "82",
journal = "Physical Review B",
issn = "0163-1829",
publisher = "American Institute of Physics Publising LLC",
number = "6",

}

TY - JOUR

T1 - Cotunneling in pairs of coupled flux qubits

AU - Lanting, T.

AU - Harris, R.

AU - Johansson, J.

AU - Amin, M. H S

AU - Berkley, A. J.

AU - Gildert, S.

AU - Johnson, M. W.

AU - Bunyk, P.

AU - Tolkacheva, E.

AU - Ladizinsky, E.

AU - Ladizinsky, N.

AU - Oh, T.

AU - Perminov, I.

AU - Chapple, E. M.

AU - Enderud, C.

AU - Rich, C.

AU - Wilson, B.

AU - Thom, M. C.

AU - Uchaikin, S.

AU - Rose, G.

PY - 2010/8/23

Y1 - 2010/8/23

N2 - We report measurements of macroscopic resonant tunneling between the two lowest energy states of a pair of magnetically coupled rf-superconducting quantum interference device flux qubits. This technique provides both a direct means of measuring the energy gap of the two-qubit system and a method for probing of the environment coupled to the pair of qubits. Measurements of the tunneling rate as a function of qubit flux bias show a Gaussian line shape that is well matched to theoretical predictions. Moreover, the peak widths indicate that each qubit is coupled to a local environment whose fluctuations are uncorrelated with that of the other qubit.

AB - We report measurements of macroscopic resonant tunneling between the two lowest energy states of a pair of magnetically coupled rf-superconducting quantum interference device flux qubits. This technique provides both a direct means of measuring the energy gap of the two-qubit system and a method for probing of the environment coupled to the pair of qubits. Measurements of the tunneling rate as a function of qubit flux bias show a Gaussian line shape that is well matched to theoretical predictions. Moreover, the peak widths indicate that each qubit is coupled to a local environment whose fluctuations are uncorrelated with that of the other qubit.

UR - http://www.scopus.com/inward/record.url?scp=77957562424&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77957562424&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.82.060512

DO - 10.1103/PhysRevB.82.060512

M3 - Article

VL - 82

JO - Physical Review B

JF - Physical Review B

SN - 0163-1829

IS - 6

M1 - 060512

ER -