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Large Collective Lamb Shift of Two Distant Superconducting Artificial Atoms

Wen, P Y and Lin, K T and Kockum, A F and Suri, B and Ian, H and Chen, J C and Mao, S Y and Chiu, C C and Delsing, P and Nori, F and Lin, G D and Hoi, I C (2019) Large Collective Lamb Shift of Two Distant Superconducting Artificial Atoms. In: PHYSICAL REVIEW LETTERS, 123 (23).

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Official URL: https://dx.doi.org/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.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to AMER PHYSICAL SOC
Keywords: PHOTON; RADIATION; VACUUM; CAVITY
Department/Centre: Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Depositing User: Id for Latest eprints
Date Deposited: 14 Jan 2020 07:45
Last Modified: 14 Jan 2020 07:45
URI: http://eprints.iisc.ac.in/id/eprint/64257

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