Quasieigenstate coalescence in an atom-cavity quantum composite

Youngwoon Choi; Sungsam Kang; Sooin Lim; Wookrae Kim; Jung Ryul Kim; Jai Hyung Lee; Kyungwon An

doi:10.1103/PhysRevLett.104.153601

Quasieigenstate coalescence in an atom-cavity quantum composite

Youngwoon Choi, Sungsam Kang, Sooin Lim, Wookrae Kim, Jung Ryul Kim, Jai Hyung Lee, Kyungwon An

Research output: Contribution to journal › Article › peer-review

98 Citations (Scopus)

Abstract

We report the first direct observation of an exceptional point (EP) in an open quantum composite of a single atom and a high-Q cavity mode. The atom-cavity coupling constant was made a continuous variable by utilizing the multisublevel nature of a single rubidium atom when it is optimally coupled to the cavity mode. The spectroscopic properties of quasieigenstates of the atom-cavity composite were experimentally investigated near the EP. Branch-point singularity of quasieigenenergies was observed and its 4π symmetry was demonstrated. Consequently, the cavity transmission at the quasieigenstate was observed to exhibit a critical behavior at the EP.

Original language	English
Article number	153601
Journal	Physical review letters
Volume	104
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.104.153601
Publication status	Published - 2010 Apr 13

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1103/PhysRevLett.104.153601

Cite this

@article{f78a9de8df2648f5ae5338a5e2bdb19f,

title = "Quasieigenstate coalescence in an atom-cavity quantum composite",

abstract = "We report the first direct observation of an exceptional point (EP) in an open quantum composite of a single atom and a high-Q cavity mode. The atom-cavity coupling constant was made a continuous variable by utilizing the multisublevel nature of a single rubidium atom when it is optimally coupled to the cavity mode. The spectroscopic properties of quasieigenstates of the atom-cavity composite were experimentally investigated near the EP. Branch-point singularity of quasieigenenergies was observed and its 4π symmetry was demonstrated. Consequently, the cavity transmission at the quasieigenstate was observed to exhibit a critical behavior at the EP.",

author = "Youngwoon Choi and Sungsam Kang and Sooin Lim and Wookrae Kim and Kim, {Jung Ryul} and Lee, {Jai Hyung} and Kyungwon An",

year = "2010",

month = apr,

day = "13",

doi = "10.1103/PhysRevLett.104.153601",

language = "English",

volume = "104",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "15",

}

TY - JOUR

T1 - Quasieigenstate coalescence in an atom-cavity quantum composite

AU - Choi, Youngwoon

AU - Kang, Sungsam

AU - Lim, Sooin

AU - Kim, Wookrae

AU - Kim, Jung Ryul

AU - Lee, Jai Hyung

AU - An, Kyungwon

PY - 2010/4/13

Y1 - 2010/4/13

N2 - We report the first direct observation of an exceptional point (EP) in an open quantum composite of a single atom and a high-Q cavity mode. The atom-cavity coupling constant was made a continuous variable by utilizing the multisublevel nature of a single rubidium atom when it is optimally coupled to the cavity mode. The spectroscopic properties of quasieigenstates of the atom-cavity composite were experimentally investigated near the EP. Branch-point singularity of quasieigenenergies was observed and its 4π symmetry was demonstrated. Consequently, the cavity transmission at the quasieigenstate was observed to exhibit a critical behavior at the EP.

AB - We report the first direct observation of an exceptional point (EP) in an open quantum composite of a single atom and a high-Q cavity mode. The atom-cavity coupling constant was made a continuous variable by utilizing the multisublevel nature of a single rubidium atom when it is optimally coupled to the cavity mode. The spectroscopic properties of quasieigenstates of the atom-cavity composite were experimentally investigated near the EP. Branch-point singularity of quasieigenenergies was observed and its 4π symmetry was demonstrated. Consequently, the cavity transmission at the quasieigenstate was observed to exhibit a critical behavior at the EP.

UR - http://www.scopus.com/inward/record.url?scp=77950835679&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.104.153601

DO - 10.1103/PhysRevLett.104.153601

M3 - Article

AN - SCOPUS:77950835679

VL - 104

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 15

M1 - 153601

ER -

Quasieigenstate coalescence in an atom-cavity quantum composite

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this