Ultrastable optical clock with two cold-atom ensembles

M. Schioppo, R. C. Brown, W. F. McGrew, N. Hinkley, R. J. Fasano, K. Beloy, Tai Hyun Yoon, G. Milani, D. Nicolodi, J. A. Sherman, N. B. Phillips, C. W. Oates, A. D. Ludlow

Research output: Contribution to journalArticle

117 Citations (Scopus)

Abstract

Atomic clocks based on optical transitions are the most stable, and therefore precise, timekeepers available. These clocks operate by alternating intervals of atomic interrogation with the € dead' time required for quantum state preparation and readout. This non-continuous interrogation of the atom system results in the Dick effect, an aliasing of frequency noise from the laser interrogating the atomic transition. Despite recent advances in optical clock stability that have been achieved by improving laser coherence, the Dick effect has continually limited the performance of optical clocks. Here we implement a robust solution to overcome this limitation: a zero-dead-time optical clock that is based on the interleaved interrogation of two cold-atom ensembles. This clock exhibits vanishingly small Dick noise, thereby achieving an unprecedented fractional frequency instability assessed to be for an averaging time., in seconds. We also consider alternate dual-atom-ensemble schemes to extend laser coherence and reduce the standard quantum limit of clock stability, achieving a spectroscopy line quality factor of Q > 4 × 10 15.

Original languageEnglish
Pages (from-to)48-52
Number of pages5
JournalNature Photonics
Volume11
Issue number1
DOIs
Publication statusPublished - 2017 Jan 3

Fingerprint

clocks
Clocks
Atoms
interrogation
atoms
Lasers
Atomic clocks
lasers
atomic clocks
Optical transitions
optical transition
readout
Q factors
Spectroscopy
intervals
preparation
spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

Cite this

Schioppo, M., Brown, R. C., McGrew, W. F., Hinkley, N., Fasano, R. J., Beloy, K., ... Ludlow, A. D. (2017). Ultrastable optical clock with two cold-atom ensembles. Nature Photonics, 11(1), 48-52. https://doi.org/10.1038/nphoton.2016.231

Ultrastable optical clock with two cold-atom ensembles. / Schioppo, M.; Brown, R. C.; McGrew, W. F.; Hinkley, N.; Fasano, R. J.; Beloy, K.; Yoon, Tai Hyun; Milani, G.; Nicolodi, D.; Sherman, J. A.; Phillips, N. B.; Oates, C. W.; Ludlow, A. D.

In: Nature Photonics, Vol. 11, No. 1, 03.01.2017, p. 48-52.

Research output: Contribution to journalArticle

Schioppo, M, Brown, RC, McGrew, WF, Hinkley, N, Fasano, RJ, Beloy, K, Yoon, TH, Milani, G, Nicolodi, D, Sherman, JA, Phillips, NB, Oates, CW & Ludlow, AD 2017, 'Ultrastable optical clock with two cold-atom ensembles', Nature Photonics, vol. 11, no. 1, pp. 48-52. https://doi.org/10.1038/nphoton.2016.231
Schioppo M, Brown RC, McGrew WF, Hinkley N, Fasano RJ, Beloy K et al. Ultrastable optical clock with two cold-atom ensembles. Nature Photonics. 2017 Jan 3;11(1):48-52. https://doi.org/10.1038/nphoton.2016.231
Schioppo, M. ; Brown, R. C. ; McGrew, W. F. ; Hinkley, N. ; Fasano, R. J. ; Beloy, K. ; Yoon, Tai Hyun ; Milani, G. ; Nicolodi, D. ; Sherman, J. A. ; Phillips, N. B. ; Oates, C. W. ; Ludlow, A. D. / Ultrastable optical clock with two cold-atom ensembles. In: Nature Photonics. 2017 ; Vol. 11, No. 1. pp. 48-52.
@article{df01d968f9ab4ab2848d1c01fac34c28,
title = "Ultrastable optical clock with two cold-atom ensembles",
abstract = "Atomic clocks based on optical transitions are the most stable, and therefore precise, timekeepers available. These clocks operate by alternating intervals of atomic interrogation with the € dead' time required for quantum state preparation and readout. This non-continuous interrogation of the atom system results in the Dick effect, an aliasing of frequency noise from the laser interrogating the atomic transition. Despite recent advances in optical clock stability that have been achieved by improving laser coherence, the Dick effect has continually limited the performance of optical clocks. Here we implement a robust solution to overcome this limitation: a zero-dead-time optical clock that is based on the interleaved interrogation of two cold-atom ensembles. This clock exhibits vanishingly small Dick noise, thereby achieving an unprecedented fractional frequency instability assessed to be for an averaging time., in seconds. We also consider alternate dual-atom-ensemble schemes to extend laser coherence and reduce the standard quantum limit of clock stability, achieving a spectroscopy line quality factor of Q > 4 × 10 15.",
author = "M. Schioppo and Brown, {R. C.} and McGrew, {W. F.} and N. Hinkley and Fasano, {R. J.} and K. Beloy and Yoon, {Tai Hyun} and G. Milani and D. Nicolodi and Sherman, {J. A.} and Phillips, {N. B.} and Oates, {C. W.} and Ludlow, {A. D.}",
year = "2017",
month = "1",
day = "3",
doi = "10.1038/nphoton.2016.231",
language = "English",
volume = "11",
pages = "48--52",
journal = "Nature Photonics",
issn = "1749-4885",
publisher = "Nature Publishing Group",
number = "1",

}

TY - JOUR

T1 - Ultrastable optical clock with two cold-atom ensembles

AU - Schioppo, M.

AU - Brown, R. C.

AU - McGrew, W. F.

AU - Hinkley, N.

AU - Fasano, R. J.

AU - Beloy, K.

AU - Yoon, Tai Hyun

AU - Milani, G.

AU - Nicolodi, D.

AU - Sherman, J. A.

AU - Phillips, N. B.

AU - Oates, C. W.

AU - Ludlow, A. D.

PY - 2017/1/3

Y1 - 2017/1/3

N2 - Atomic clocks based on optical transitions are the most stable, and therefore precise, timekeepers available. These clocks operate by alternating intervals of atomic interrogation with the € dead' time required for quantum state preparation and readout. This non-continuous interrogation of the atom system results in the Dick effect, an aliasing of frequency noise from the laser interrogating the atomic transition. Despite recent advances in optical clock stability that have been achieved by improving laser coherence, the Dick effect has continually limited the performance of optical clocks. Here we implement a robust solution to overcome this limitation: a zero-dead-time optical clock that is based on the interleaved interrogation of two cold-atom ensembles. This clock exhibits vanishingly small Dick noise, thereby achieving an unprecedented fractional frequency instability assessed to be for an averaging time., in seconds. We also consider alternate dual-atom-ensemble schemes to extend laser coherence and reduce the standard quantum limit of clock stability, achieving a spectroscopy line quality factor of Q > 4 × 10 15.

AB - Atomic clocks based on optical transitions are the most stable, and therefore precise, timekeepers available. These clocks operate by alternating intervals of atomic interrogation with the € dead' time required for quantum state preparation and readout. This non-continuous interrogation of the atom system results in the Dick effect, an aliasing of frequency noise from the laser interrogating the atomic transition. Despite recent advances in optical clock stability that have been achieved by improving laser coherence, the Dick effect has continually limited the performance of optical clocks. Here we implement a robust solution to overcome this limitation: a zero-dead-time optical clock that is based on the interleaved interrogation of two cold-atom ensembles. This clock exhibits vanishingly small Dick noise, thereby achieving an unprecedented fractional frequency instability assessed to be for an averaging time., in seconds. We also consider alternate dual-atom-ensemble schemes to extend laser coherence and reduce the standard quantum limit of clock stability, achieving a spectroscopy line quality factor of Q > 4 × 10 15.

UR - http://www.scopus.com/inward/record.url?scp=84997796200&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84997796200&partnerID=8YFLogxK

U2 - 10.1038/nphoton.2016.231

DO - 10.1038/nphoton.2016.231

M3 - Article

VL - 11

SP - 48

EP - 52

JO - Nature Photonics

JF - Nature Photonics

SN - 1749-4885

IS - 1

ER -