4-3 new regime of circuit quantum electro dynamics

Kouichi Semba, Fumiki Yoshihara, Tomoko Fuse, Sahel Ashhab, Kosuke Kakuyanagi, Shiro Saito

Research output: Contribution to journalArticle


Researchers at the National Institute of Information and Communications Technology (NICT), in collaboration with researchers at the NTT Basic Research Laboratories, Nippon Telegraph and Telephone Corporation (NTT-BRL) and the Qatar Environment and Energy Research Institute (QEERI) have discovered qualitatively new lowest energy state of a superconducting artificial atom dressed with virtual photons. The discovery was made using spectroscopic measurements on an artificial atom that is very strongly coupled to the electromagnetic field inside a superconducting resonator. This result provides a new platform to investigate the interaction between light and matter at a fundamental level, helps understand quantum phase transitions and provides a route to applications of non-classical light such as Schrödinger cat states. It may contribute to the development of quantum technologies in areas such as quantum communication, quantum simulation and computation, or quantum metrology.

Original languageEnglish
Pages (from-to)65-70
Number of pages6
JournalJournal of the National Institute of Information and Communications Technology
Issue number1
Publication statusPublished - 1 Jan 2017


ASJC Scopus subject areas

  • Media Technology
  • Electrical and Electronic Engineering

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