Large Collective Lamb Shift of Two Distant Superconducting Artificial Atoms

P Y Wen^{1

2}, K-T Lin³, A F Kockum^{4

5}, B Suri^{4

6}, H Ian^{7

8}, J C Chen^{1

2}, S Y Mao⁹, C C Chiu¹⁰, P Delsing⁴, F Nori^{5

11}, G-D Lin³, I-C Hoi^{1

2}

Affiliations

¹ Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan.
² Center for Quantum Technology, National Tsing Hua University, Hsinchu 30013, Taiwan.
³ CQSE, Department of Physics, National Taiwan University, Taipei 10617, Taiwan.
⁴ Department of Microtechnology and Nanoscience, Chalmers University of Technology, 412 96 Gothenburg, Sweden.
⁵ Theoretical Quantum Physics Laboratory, RIKEN Cluster for Pioneering Research, Wako-shi, Saitama 351-0198, Japan.
⁶ Department of Instrumentation and Applied Physics, Indian Institute of Science, Bengaluru 560012, India.
⁷ Institute of Applied Physics and Materials Engineering, University of Macau, Macau, China.
⁸ UMacau Zhuhai Research Institute, Zhuhai, Guangdong 519031, China.
⁹ Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30013, Taiwan.
¹⁰ Department of Electrical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.
¹¹ Physics Department, The University of Michigan, Ann Arbor, Michigan 48109-1040, USA.

PMID: 31868475
DOI: 10.1103/PhysRevLett.123.233602

Large Collective Lamb Shift of Two Distant Superconducting Artificial Atoms

P Y Wen et al. Phys Rev Lett. 2019.

. 2019 Dec 6;123(23):233602.

doi: 10.1103/PhysRevLett.123.233602.

Authors

P Y Wen^{1

2}, K-T Lin³, A F Kockum^{4

5}, B Suri^{4

6}, H Ian^{7

8}, J C Chen^{1

2}, S Y Mao⁹, C C Chiu¹⁰, P Delsing⁴, F Nori^{5

11}, G-D Lin³, I-C Hoi^{1

2}

Affiliations

¹ Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan.
² Center for Quantum Technology, National Tsing Hua University, Hsinchu 30013, Taiwan.
³ CQSE, Department of Physics, National Taiwan University, Taipei 10617, Taiwan.
⁴ Department of Microtechnology and Nanoscience, Chalmers University of Technology, 412 96 Gothenburg, Sweden.
⁵ Theoretical Quantum Physics Laboratory, RIKEN Cluster for Pioneering Research, Wako-shi, Saitama 351-0198, Japan.
⁶ Department of Instrumentation and Applied Physics, Indian Institute of Science, Bengaluru 560012, India.
⁷ Institute of Applied Physics and Materials Engineering, University of Macau, Macau, China.
⁸ UMacau Zhuhai Research Institute, Zhuhai, Guangdong 519031, China.
⁹ Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30013, Taiwan.
¹⁰ Department of Electrical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.
¹¹ Physics Department, The University of Michigan, Ann Arbor, Michigan 48109-1040, USA.

PMID: 31868475
DOI: 10.1103/PhysRevLett.123.233602

Abstract

Virtual photons can mediate interaction between atoms, resulting in an energy shift known as a collective Lamb shift. Observing the collective Lamb shift is challenging, since it can be obscured by radiative decay and direct atom-atom interactions. Here, we place two superconducting qubits in a transmission line terminated by a mirror, which suppresses decay. We measure a collective Lamb shift reaching 0.8% of the qubit transition frequency and twice the transition linewidth. We also show that the qubits can interact via the transmission line even if one of them does not decay into it.

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Large Collective Lamb Shift of Two Distant Superconducting Artificial Atoms

Affiliations

Large Collective Lamb Shift of Two Distant Superconducting Artificial Atoms

Authors

Affiliations

Abstract

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