Large collective Lamb shift of two distant superconducting artificial atoms

Autor:	Wen, P. Y., Lin, K. -T., Kockum, A. F., Suri, B., Ian, H., Chen, J. C., Mao, S. Y., Chiu, C. C., Delsing, P., Nori, F., Lin, G. -D., Hoi, I. -C.
Rok vydání:	2019
Předmět:	Quantum Physics Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Phys. Rev. Lett. 123, 233602 (2019)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.123.233602
Popis:	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 exceeding 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. Comment: 7+5 pages, 4+2 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1904.12473 Zobrazit plný text záznamu View this record from Arxiv