Optical Lattice Clocks

Publications / Theses / PTB publications

2021

S. Dörscher, N. Huntemann, R. Schwarz, R. Lange, E. Benkler, B. Lipphardt, U. Sterr, E. Peik, C. Lisdat
Optical frequency ratio of a ¹⁷¹Yb⁺ single-ion clock and a ⁸⁷Sr lattice clock
Metrologia 58, 015005 (2021)

2020

M. Schulte, C. Lisdat, P.O. Schmidt, U. Sterr, K. Hammerer
Prospects and challenges for squeezing-enhanced optical atomic clocks
Nature Comms. 11, 5955 (2020)

B. M. Roberts, P. Delva, A. Al-Masoudi, A. Amy-Klein, C. Bærentsen, C. F. A. Baynham, E. Benkler, S. Bilicki, S. Bize, W. Bowden, J. Calvert, V. Cambier, E. Cantin, E. A. Curtis, S. Dörscher, M. Favier, F. Frank, P. Gill, R. M. Godun, G. Grosche, C. Guo, A. Hees, I. R. Hill, R. Hobson, N. Huntemann, J. Kronjäger, S. Koke, A. Kuhl, R. Lange, T. Legero, B. Lipphardt, C. Lisdat, J. Lodewyck, O. Lopez, H. S. Margolis, H. Alvarez-Martinez, F. Meynadier, F. Ozimek, E. Peik, P.-E. Pottie, N. Quintin, C. Sanner, L. De Sarlo, M. Schioppo, R. Schwarz, A. Silva, U. Sterr, C. Tamm, R. Le Targat, P. Tuckey, G. Vallet, T. Waterholter, D. Xu,  P. Wolf
Search for transient variations of the fine structure constant and dark matter using fiber-linked optical atomic clocks
New J. Phys. 22, 093010 (2020)

R. Schwarz, S. Dörscher, A. Al-Masoudi, E. Benkler, T. Legero, U.  Sterr, S. Weyers, J. Rahm, B. Lipphardt, C. Lisdat
Long term measurement of the ⁸⁷Sr clock frequency at the limit of primary Cs clocks
Phys. Rev. Research 2, 033242 (2020) 

Search for transient variations of the fine structure constant and dark matter using fiber-linked optical atomic clocks
New J. Phys. accepted manuscript (2020)

R. Schwarz, S. Dörscher, A. Al-Masoudi, E. Benkler, T. Legero, U.  Sterr, S. Weyers, J. Rahm, B. Lipphardt, C. Lisdat
Long term measurement of the ⁸⁷Sr clock frequency at the limit of primary Cs clocks
Phys. Rev. Research 27, 033242 (2020)

F. Riedel, A. Al-Masoudi, E. Benkler, S. Dörscher, V. Gerginov, C. Grebing, S. Häfner, N. Huntemann, B. Lipphardt, C. Lisdat, E. Peik, D. Piester, C. Sanner, C. Tamm, S. Weyers, H. Denker, L. Timmen, C. Voigt, D. Calonico, G. Cerretto, G.A. Costanzo, F. Levi, I. Sesia, J. Achkar, J. Guéna, M. Abgrall, G.D. Rovera, B. Chupin, C. Shi, S. Bilicki, E. Bookjans, J. Lodewyck, R. Le Targat, P. Delva, S. Bize, F.N. Baynes, C. Baynham, W. Bowden, P. Gill, R.M. Godun, I.R. Hill, R. Hobson, J.M. Jones, S.A. King, P. Nisbet-Jones, A. Rolland, S.L. Shemar, P.B. Whibberley, H.S. Margolis
Direct comparisons of European primary and secondary frequency standards via satellite techniques
Metrologia 57, 045005 (2020)

S. Häfner, S. Herbers, S. Vogt, Ch. Lisdat, U. Sterr
A transportable interrogation laser system with an instability of mod σ_y = 3×10^-16 
Opt. Express 28, 16407 (2020)

2019

S. Herbers, S. Dörscher, E. Benkler, Ch. Lisdat
Phase noise of frequency doublers in optical clock lasers
Opt. Express 27, 23262 (2019) 

R. Schwarz, S. Dörscher, A. Al-Masoudi, S. Vogt, Ye Li, Ch. Lisdat
A compact and robust cooling laser system for an optical strontium lattice clock
Rev. Sci. Instr. 90, 023109 (2019)

2018

S. Origlia, M. S. Pramod, S. Schiller, Y. Singh, K. Bongs, R. Schwarz, A. Al-Masoudi, S. Dörscher, S. Herbers, S. Häfner, U. Sterr, Ch. Lisdat
Towards an optical clock for space: Compact, high-performance optical lattice clock based on bosonic atoms [pdf]¹⁾
Phys. Rev. A 98, 053443 (2018)

S. Dörscher, R. Schwarz, A. Al-Masoudi, S. Falke, U. Sterr, Ch. Lisdat
Lattice-induced photon scattering in an optical lattice clock
Phys. Rev. A 97, 063419 (2018)

Ch. Lisdat, H. Schnatz
Uhren als Höhenmesser
Physik in unserer Zeit 49, 110 (2018)

T. Mehlstäubler, G. Grosche, Ch. Lisdat, P. Schmidt, H. Denker
Atomic Clocks for Geodesy
Rep. Prog. Phys. 81, 064401 (2018)

J. Grotti, S. Koller, S. Vogt, S. Häfner, U. Sterr, C. Lisdat, H. Denker, C. Voigt, L. Timmen, A. Rolland, F. N. Baynes, H. S. Margolis, M. Zampaolo, P. Thoumany, M. Pizzocaro, B. Rauf, F. Bregolin, A. Tampellini, P. Barbieri, M. Zucco, G. A. Costanzo, C. Clivati, F. Levi, D. Calonico
Geodesy and metrology with a transportable optical clock
Nature Physics 14, 437 (2018)

2017

P. Delva, J. Lodewyck, S. Bilicki, E. Bookjans, G. Vallet, R. Le Targat, P.-E. Pottie, C. Guerlin, F. Meynadier, C. Le Poncin-Lafitte, O. Lopez, A. Amy-Klein, W.-K. Lee, N. Quintin, C. Lisdat, A. Al-Masoudi, S. Dörscher, C. Grebing, G. Grosche, A. Kuhl, S. Raupach, U. Sterr, I. R. Hill, R. Hobson, W. Bowden, J. Kronjäger, G. Marra, A. Rolland, F. N. Baynes, H. S. Margolis, P. Gill
Test of special relativity using a fiber network of optical clocks
Phys. Rev. Lett. 118, 221102 (2017)

I. Kruse, K. Lange, J. Peise, B. Lücke, L. Pezzé, J. Arlt, W. Ertmer, C. Lisdat, L. Santos, A. Smerzi, C. Klempt
0.75 atoms improve the clock signal of 10,000 atoms
Proc. of SPIE 10119,101190D-101190D-10 (2017)

S. B. Koller, J. Grotti, St. Vogt, A. Al-Masoudi, S. Dörscher, S. Häfner, U. Sterr, Ch. Lisdat
Transportable optical lattice clock with 7×10⁻¹⁷ uncertainty
Phys. Rev. Lett. 118, 073601 (2017)

2016

I. Kruse, K. Lange, J. Peise, B. Lücke, L. Pezzé, J. Arlt, W. Ertmer, C. Lisdat, L. Santos, A. Smerzi, C. Klempt
Improvement of an atomic clock using squeezed vacuum
Phys. Rev. Lett. 117, 143004 (2016)

C. Lisdat, G. Grosche, N. Quintin, C. Shi, S. M. F. Raupach, C. Grebing, D. Nicolodi, F. Stefani, A. Al-Masoudi, S. Dörscher, S. Häfner, J. L. Robyr, N. Chiodo, S. Bilicki, E. Bookjans, A. Koczwara, S. Koke, A. Kuhl, F. Wiotte, F. Meynadier, E. Camisard, M. Abgrall, M. Lours, T. Legero, H. Schnatz, U. Sterr, H. Denker, C. Chardonnet, Y. Le Coq, G. Santarelli, A. Amy-Klein, R. Le Targat, J. Lodewyck, O. Lopez, P.-E. Pottie
A clock network for geodesy and fundamental science
Nature Comms. 7, 12443 (2016)

C. Grebing, A. Al-Masoudi, S. Dörscher, S. Häfner, V. Gerginov, S. Weyers, B. Lipphardt, F. Riehle, U. Sterr, C. Lisdat
Realization of a time-scale with an optical clock
Optica 3, 563 – 569 (2016)

D. Świerad, S. Häfner, S. Vogt, B. Venon, D. Holleville, S. Bize, A. Kulosa, S. Bode, Y. Singh, K. Bongs, E. M. Rasel, J. Lodewyck, R. Le Targat, C. Lisdat, Uwe Sterr
Ultra-stable clock laser system development towards space applications
Scientific Reports 6, 33973 (2016)

S. Vogt, S. Häfner, J. Grotti, S. Koller, A. Al-Masoudi, U. Sterr, C. Lisdat
A transportable optical lattice clock
Journal of Physics: Conference Series 723, 012020  (2016)

D. Matei, T. Legero, C. Grebing, S. Häfner, C. Lisdat, R. Weyrich, W. Zhang, L. Sonderhouse, J. M. Robinson, F. Riehle, J, Ye, U. Sterr
A second generation of low thermal noise cryogenic silicon resonators
Journal of Physics: Conference Series 723, 012031 (2016)

S. Origlia, S. Schiller, M.S.  Pramod, L. Smith, Y. Singh, W. He, S. Viswam, D. Świerad, J. Hughes, K. Bongs, U. Sterr, C. Lisdat, S. Vogt, S. Bize, J. Lodewyck, R. Le Targat, D. Holleville, B. Venon, P. Gill, G. Barwood, I.R. Hill, Y. Ovchinnikov, A. Kulosa, W. Ertmer, E.-M. Rasel, J. Stuhler, W. Kaenders
Development of a strontium optical lattice clock for the SOC mission on the ISS
Proc. of SPIE 9900, 990003-1 (2016)

2015

A. Al-Masoudi, S. Dörscher, S. Häfner, U. Sterr, C. Lisdat
Noise and instability of an optical lattice clock
Phys. Rev. A 92, 063814 (2015)

E. Benkler, Ch. Lisdat, U. Sterr
On the relation between uncertainties of weighted frequency averages and the various types of Allan deviations
Metrologia 52, 565 (2015)

K. Bongs, Y. Singh, L. Smith, W. He, O. Kock, D. Swierad, J. Hughes, S. Schiller, S. Alighanbari, S. Origlia, S. Vogt, U. Sterr, Ch. Lisdat, R. Le Targat, J. Lodewyck, D. Holleville, B. Venon, S. Bize
Development of a strontium optical lattice clock for the SOC mission on the ISS
C. R. Physique 16, 553 – 564 (2015)

S. Häfner, S. Falke, C. Grebing, S. Vogt, T. Legero, M. Merimaa, C. Lisdat, Uwe Sterr
8×10^-17 fractional laser frequency instability with a long room-temperature cavity
Opt. Lett. 40, 2112 – 2115 (2015)

2014

N. Poli, M. Schioppo, S. Vogt, St. Falke, U. Sterr, Ch. Lisdat, & G. M. Tino
A transportable strontium optical lattice clock
Appl. Phys. B 117, 1107 – 1116 (2014)

C. Hagemann, C. Grebing, C. Lisdat, S. Falke, T. Legero, U. Sterr, F. Riehle, M. J. Martin, J. Ye
Ultra-stable laser with average fractional frequency drift rate below 5×10^-19 /s
Opt. Lett. 39, 5102 – 5105 (2014)

H. Hachisu, M. Fujieda, S. Nagano, T. Gotoh, A. Nogami, T. Ido, St. Falke, N. Huntemann, C. Grebing, B. Lipphardt, Ch. Lisdat, D. Piester
Direct comparison of optical lattice clocks with an intercontinental baseline of 9 000 km
Opt. Lett. 39, 4072 – 4075 (2014)

S. Falke, N. Lemke, C. Grebing, B. Lipphardt, S. Weyers, V. Gerginov, N. Huntemann, C. Hagemann, A. Al-Masoudi, S. Häfner, S. Vogt, U. Sterr, & C. Lisdat
A strontium lattice clock with 3×10^-17 inaccuracy and its frequency
New J. Phys. 16, 073023 (2014)

2013

C. Hagemann, C. Grebing, T. Kessler, S. Falke, N. Lemke, C. Lisdat, H. Schnatz, F. Riehle, & U. Sterr
Providing 10^-16 short-term stability of a 1.5 µm laser to optical clocks
IEEE Trans. Instrum. Meas. 62, 1556 – 1562 (2013)

2012

T. Middelmann, S. Falke, C. Lisdat, & U. Sterr
High Accuracy Correction of Blackbody Radiation Shift in an Optical Lattice Clock
Phys. Rev. Lett. 109, 263004 (2012)

M. Schioppo, N. Poli, M. Prevedelli, S. Falke, C. Lisdat, U. Sterr, & G. M. Tino
A compact and efficient strontium oven for laser-cooling experiments
Rev. Sci. Instrum. 83, 103101 (2012)

T. Middelmann, S. Falke, C. Lisdat, & U. Sterr
Long range transport of ultra cold atoms in a far-detuned one-dimensional optical lattice
New J. Phys. 14, 073020 (2012)

S. Falke, M. Misera, U. Sterr, & C. Lisdat
Delivering pulsed and phase stable light to atoms of an optical clock
Appl. Phys. B 107, 301 – 311 (2012)

S. Schiller, A. Görlitz, A. Nevsky, S. Alighanbari, S. Vasilyev, C. Abou-Jaoudeh, G. Mura, T. Franzen, U. Sterr, S. Falke, C. Lisdat, E. Rasel, A. Kulosa, S. Bize, J. Lodewyck, G. M. Tino, N. Poli, M. Schioppo, K. Bongs, Y. Singh, P. Gill, G. Barwood, Y. Ovchinnikov, J. Stuhler, W. Kaenders, C. Braxmaier, R. Holzwarth, A. Donati, S. Lecomte, D. Calonico, & F. Levi
The Space Optical Clocks Project: Development of high-performance transportable and breadboard optical clocks and advanced subsystems
arXiv:1206.3765 (2012)

2011

S. Falke, H. Schnatz, J. S. R. Vellore Winfred, T. Middelmann, S. Vogt, S. Weyers, B. Lipphardt, G. Grosche, F. Riehle, U. Sterr, & C. Lisdat
The ⁸⁷Sr optical frequency standard at PTB
Metrologia 48, 399 – 407 (2011)

S. Vogt, C. Lisdat, T. Legero, U. Sterr, I. Ernsting, A. Nevsky, & S. Schiller
Demonstration of a Transportable 1 Hz-Linewidth Laser
Appl. Phys. B 104, 741 – 745 (2011)

T. Middelmann, C. Lisdat, S. Falke, J. S. R. Vellore Winfred, F. Riehle, & U. Sterr
Tackling the blackbody shift in a strontium optical lattice clock
IEEE Trans. Instrum. Meas. 60, 2550 – 2557 (2011)

2010

V. I. Yudin, A. V. Taichenachev, C. W. Oates, Z. W. Barber, N. D. Lemke, A. D. Ludlow, U. Sterr, C. Lisdat, & F. Riehle
Hyper-Ramsey Spectroscopy of Optical Clock Transitions
Phys. Rev. A 81, 011804(R) (2010)

S. Liu, I. Sherstov, Ch. Lisdat, H. Knöckel, & E. Tiemann
Ramsey-Bordé interferometer and embedded Ramsey interferometer with molecular matter waves of ³⁹K₂
Eur. Phys. J. D 58, 369 – 377(2010)

2009

Ch. Lisdat, J. S. R. Vellore Winfred, T. Middelmann, F. Riehle, & U. Sterr:
Collisional Losses, Decoherence, and Frequency Shifts in Optical Lattice Clocks with Bosons
Phys. Rev. Lett. 103, 090801 (2009)

T. Legero, C. Lisdat, J. S. R. Vellore Winfred, H. Schnatz, G. Grosche, F. Riehle, & U. Sterr
Interrogation laser for a strontium lattice clock
IEEE Trans. Instrum. Meas. 58, 1252 – 1257 (2009)

H. Salami, T. Bergeman, B. Beser, J. Bai, E. H. Ahmed, S. Kotochigova, A. M. Lyyra, J. Huennekens, C. Lisdat, A. V. Stolyarov, O. Dulieu, P. Crozet, & A. J. Ross:
Spectroscopic observations, spin-orbit functions, and coupled-channel deperturbation analysis of data on the A ¹Σ_u⁺ and b ³Π_u states of Rb₂
Phys. Rev. A 80, 022515 (2009)

A. V. Taichenachev, V. I. Yudin, C. W. Oates, Z. W. Barber, N. D. Lemke, A. D. Ludlow, U. Sterr, C. Lisdat, & F. Riehle
Compensation of Field-Induced Frequency Shifts in Ramsey Spectroscopy of Optical Clock Transitions
JETP Lett. 90, 713 – 717 (2009)

T. Legero, Ch.Lisdat, J. S. R. Vellore Winfred, H. Schnatz, G. Grosche, F. Riehle, & U. Sterr
L. Maleki (Ed.)
Clock Laser System for a Strontium Lattice Clock
Proceedings of the 7th Symposium Frequency Standards and Metrology, World Scientific, 427 – 431 (2009)

2008

T. Nazarova, Ch. Lisdat, F. Riehle, & U. Sterr
Low-frequency-noise diode laser for atom interferometry
J. Opt. Soc. Am. B 25, 1632 – 1638 (2008)

S. Falke, H. Knöckel, J. Friebe, M. Riedmann, E. Tiemann, & C. Lisdat
Potassium ground-state scattering parameters and Born-Oppenheimer potentials from molecular spectroscopy
Phys. Rev. A 78, 012503 (2008)

2007 und davor

Ch. Grain, T. Nazarova, C. Degenhardt, F. Vogt, Ch. Lisdat, E. Tiemann, U. Sterr, & F. Riehle
Feasibility of narrow-line cooling in optical dipole traps
Eur. Phys. J. D 42, 317 – 324 (2007)

F. Vogt, Ch. Grain, T. Nazarova, U. Sterr, F. Riehle, Ch. Lisdat, & E. Tiemann
Determination of the calcium ground state scattering length by photoassociation spectroscopy at large detunings
Eur. Phys. J. D 44, 73 – 79 (2007)

C. Degenhardt, H. Stoehr, Ch. Lisdat, G. Wilpers, H. Schnatz, B. Lipphardt, T. Nazarova, P.-E. Pottie, U. Sterr, J. Helmcke, & F. Riehle
Calcium optical frequency standard with ultracold atoms: Approaching 10^-15 relative uncertainty
Phys. Rev. A 72, 062111-1-17 (2005)

C. Degenhardt, H. Stoehr, U. Sterr, F. Riehle, & Ch. Lisdat
Wavelength dependent ac-Stark shift of the ¹S₀-³P₁ transition at 657 nm in Ca
Phys. Rev. A 70, 023414-1-6 (2004)

U. Sterr, C. Degenhardt, H. Stoehr, Ch. Lisdat, H. Schnatz, J. Helmcke, F. Riehle, G. Wilpers, Ch. Oates, & L. Hollberg
The Optical Calcium Frequency Standards of PTB and NIST
C. R. Physique 5, 845 – 855 (2004)

C. Degenhardt, T. Binnewies, G. Wilpers, U. Sterr, F. Riehle, Ch. Lisdat, & E. Tiemann
Photoassociation spectroscopy of cold calcium atoms
Phys. Rev. A 67, 043408-1-6 (2003) 

Publisher Copyright

1) Copyright: The American Physical Society (APS) 

PhD theses (online here)

Jacopo Grotti, 2018: A transportable optical lattice clock for metrology and geodesy

Ali Al-Masoudi, 2016: A strontium lattice clock with reduced blackbody radiation shift

Stefan Vogt, 2015: Eine transportable optische Gitteruhr basierend auf Strontium

Sebastian Häfner, 2015: Ultrastabile Lasersysteme für Weltraum und Bodenanwendungen

Thomas Middelmann, 2013:
Bestimmung des Einflusses thermischer Strahlung auf eine optische Strontium-Gitteruhr

Joseph Sundar Raaj Vellore Winfred, 2010:
Investigation of collisional losses and decoherence in a 1-D optical lattice clock with ⁸⁸Sr

PTB publications

maßstäbe Heft 12: Meilensteine,   Am Puls der Zeit (2013)

PTB-Mitteilungen 2018, Heft 3:     Quantentechnologie mit Atomen und Photonen Teil I

PTB-Mitteilungen 2009, Heft 2:     QUEST

PTBnews 3/2018:     Mobile Atomuhr als Höhenmesser

PTBnews 2/2017:     Most accurate and most stable transportable optical clock

PTBnews 3/2016:     A “light highway” for highprecision frequencies

PTBnews 2/2016:     World record for two optical clocks

PTBnews 2/2013:     Optical strontium clock to become much more accurate

PTBnews 1/2011:     PTB€'s strontium lattice clock is ticking

PTBnews 2/2009:     Collisions in optical lattice clocks under control