Spectroscopy of three strongly coupled flux qubits

Antti Niskanen; K. Harrabi; F. Yoshihara; Y. Nakamura; J.S. Tsai

doi:10.1103/PhysRevB.74.220503

Spectroscopy of three strongly coupled flux qubits

Antti Niskanen^*
, K. Harrabi
, F. Yoshihara
, Y. Nakamura
, J.S. Tsai

^*Corresponding author for this work

VTT Technical Research Centre of Finland

VTT (former employee or external)
Japan Science and Technology Agency (JST)
RIKEN The Institute of Physical and Chemical Research
NEC Corporation

Research output: Contribution to journal › Article › Scientific › peer-review

33 Citations (Scopus)

Abstract

We have carried out spectroscopic measurements of a system of three strongly coupled four-junction flux qubits. The samples studied cover a wide range of parameters with the coupling energy between neighboring qubits varying between
0.75 GHz and 6.05 GHz. The observed complicated spectra agree well with eight-level theory. The experiments are relevant for the realization of a tunable coupling between qubits.

Original language	English
Article number	220503
Number of pages	4
Journal	Physical Review B: Condensed Matter and Materials Physics
Volume	74
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.74.220503
Publication status	Published - 2006
MoE publication type	A1 Journal article-refereed

Keywords

quantum computing
antiferromagnetism
SQUID
Josephson junction
qubits

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10.1103/PhysRevB.74.220503

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abstract = "We have carried out spectroscopic measurements of a system of three strongly coupled four-junction flux qubits. The samples studied cover a wide range of parameters with the coupling energy between neighboring qubits varying between 0.75 GHz and 6.05 GHz. The observed complicated spectra agree well with eight-level theory. The experiments are relevant for the realization of a tunable coupling between qubits.",

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AU - Nakamura, Y.

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KW - quantum computing

KW - antiferromagnetism

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KW - Josephson junction

KW - qubits

U2 - 10.1103/PhysRevB.74.220503

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JO - Physical Review B: Condensed Matter and Materials Physics

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Spectroscopy of three strongly coupled flux qubits

Abstract

Keywords

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