Ultrastrong coupling in two-resonator circuit QED
Artikel i vetenskaplig tidskrift, 2016

We report on ultrastrong coupling between a superconducting flux qubit and a resonant mode of a system comprised of two superconducting coplanar stripline resonators coupled galvanically to the qubit. With a coupling strength as high as 17.5% of the mode frequency, exceeding that of previous circuit quantum electrodynamics experiments, we observe a pronounced Bloch-Siegert shift. The spectroscopic response of our multimode system reveals a clear breakdown of the Jaynes-Cummings approximation. In contrast to earlier experiments, the high coupling strength is achieved without making use of an additional inductance provided by a Josephson junction.

Författare

A. Baust

Nanosystems Initiative Munich (NIM)

Walther-Meissner-Institut

Technische Universität München

E. Hoffmann

Walther-Meissner-Institut

Technische Universität München

M. Haeberlein

Walther-Meissner-Institut

Technische Universität München

M. J. Schwarz

Technische Universität München

Walther-Meissner-Institut

Nanosystems Initiative Munich (NIM)

P. Eder

Walther-Meissner-Institut

Technische Universität München

Nanosystems Initiative Munich (NIM)

J. Goetz

Walther-Meissner-Institut

Technische Universität München

F. Wulschner

Walther-Meissner-Institut

Technische Universität München

E. Xie

Technische Universität München

Walther-Meissner-Institut

L. Zhong

Walther-Meissner-Institut

Technische Universität München

Nanosystems Initiative Munich (NIM)

Isaac Fernando Quijandria Diaz

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

D. Zueco

Fundación ARAID

Universidad de Zaragoza

J. J. G. Ripoll

CSIC - Instituto de Fisica Fundamental (IFF)

L. Garcia-Alvarez

Universidad del Pais Vasco - Euskal Herriko Unibertsitatea, Campus Bizkaia

G. Romero

Universidad del Pais Vasco - Euskal Herriko Unibertsitatea, Campus Bizkaia

Universidad de Santiago de Chile

E. Solano

Universidad del Pais Vasco - Euskal Herriko Unibertsitatea, Campus Bizkaia

Basque Foundation for Science (Ikerbasque)

K. G. Fedorov

Technische Universität München

Walther-Meissner-Institut

E. P. Menzel

Technische Universität München

Walther-Meissner-Institut

F. Deppe

Walther-Meissner-Institut

Nanosystems Initiative Munich (NIM)

Technische Universität München

A. Marx

Walther-Meissner-Institut

R. Gross

Technische Universität München

Nanosystems Initiative Munich (NIM)

Walther-Meissner-Institut

Physical Review B

24699950 (ISSN) 24699969 (eISSN)

Vol. 93 21 Art. no. 214501- 214501

Quantum Propagating Microwaves in Strongly Coupled Environments (PROMISCE)

Europeiska kommissionen (FP7), 2012-04-01 -- 2015-03-31.

Scalable Superconducting Processors for Entangled Quantum Information Technology (ScaleQIT)

Europeiska kommissionen (FP7), 2013-02-01 -- 2016-01-31.

Ämneskategorier

Atom- och molekylfysik och optik

DOI

10.1103/PhysRevB.93.214501