Ludlow, AD, Boyd, MM, Ye, J., Peik, E. & Schmidt, PO Optical atomic clocks. Rev. Mod. Phys. 87, 637-701 (2015).
Ushijima, I., Takamoto, M., Das, M., Ohkubo, T. & Katori, H. Cryogenic lattice optical clocks. Wet. Photon. 9, 185-189 (2015).
Oelker, E. et al. Demonstration of 4.8 × 10-17 stability at 1 s for two independent optical clocks. Wet. Photon. 13, 714-719 (2019).
Schioppo, M. et al. Ultra-stable optical clock with two cold atom ensembles. Wet. Photon. 11, 48-52 (2017).
Dick, GJ Local oscillator induced instabilities in stuck ion frequency standards. Report ADA502386 (California Institute of Technology, Pasadena Jet Propulsion Lab, 1987); https://apps.dtic.mil/sti/citations/ADA502386.
Norcia, MA et al. Coherence on a seconds scale on an optical clock transition in a tweezer array. Science 366, 93–97 (2019).
Takamoto, M., Takano, T. & Katori, H. Frequency comparison of optical lattice clocks beyond the dick limit. Wet. Photon. 5, 288–292 (2011).
Nicholson, TL et al. Comparison of two independent Sr optical clocks with 1 × 10-17 stability at 103 s. Phys. Rev. Lett. 109, 230801 (2012).
Appel, J. et al .; Mesoscopic atomic entanglement for precision measurements outside the standard quantum boundary. Proc. Natl Acad. Sci. United States 106, 10960-10965 (2009).
Takano, T., Fuyama, M., Namiki, R. & Takahashi, Y. Rotate the pinching of a cold atomic ensemble with the nuclear spin of one half. Phys. Rev. Lett. 102, 033601 (2009).
Gross, C., Zibold, T., Nicklas, E., Esteve, J. & Oberthaler, MK Nonlinear atomic interferometer surpasses the classic precision limit. Nature 464, 1165-1169 (2010).
Riedel, MF et al. Nuclear chip-based entanglement generation for quantum metrology. Nature 464, 1170-1173 (2010).
Schleier-Smith, MH, Leroux, ID & Vuletić, V. Compressing the collective spin of a diluted atomic ensemble by cavity feedback. Phys. Rev. a 81, 021804 (2010).
Leroux ID, Schleier-Smith, MH & Vuletić, V. Implementation of cavity squeezing of a collective atomic spin. Phys. Rev. Lett. 104, 073602 (2010).
Kruse, I. et al. Improvement of an atomic clock using compressed vacuum. Phys. Rev. Lett. 117, 143004 (2016).
Pezzè, L., Smerzi, A., Oberthaler, MK, Schmied, R. & Treutlein, P. Quantum metrology with non-classical states of atomic ensembles. Rev. Mod. Phys. 90, 035005 (2018).
Cox, KC, Greve, GP, Weiner, JM & Thompson, JK Deterministic pressed states with collective measurements and feedback. Phys. Rev. Lett. 116, 093602 (2016).
Hosten, O., Engels, NJ, Krishnakumar, R. & Kasevich, MA Measurement noise 100 times lower than the quantum projection limit when using entangled atoms. Nature 529, 505-508 (2016).
Bohnet, JG et al. Quantum spin dynamics and entanglement generation with hundreds of trapped ions. Science 352, 1297-1301 (2016).
Braverman, B. et al. Near-unit spin squeezing in Yb 171. Phys. Rev. Lett. 122, 223203 (2019).
Wcisło, P. et al. New limits to dark matter coupling from a global network of optical atomic clocks. Sci. Adv. 4, eaau4869 (2018).
Safronova, MS et al. Search for new physics with atoms and molecules. Rev. Mod. Phys. 90, 025008 (2018).
Safronova, MS The quest for variation of fundamental constants with clocks. Ann. Phys. 531, 1800364 (2019).
Google scholar
Lisdat, C. et al. A clock network for geodesy and fundamental science. Wet. Commun. 7, 12443 (2016).
Grotti, J. et al .; Geodesy and metrology with a movable optical clock. Wet. Phys. 14, 437-441 (2018).
Takamoto, M. et al. Test of general relativity by a pair of movable optical lattice clocks. Wet. Photon. 14, 411-415 (2020).
Kolkowitz, S. et al. Gravitational wave detection with optical lattice atom clocks. Phys. Rev.D 94, 124043 (2016).
Wineland, DJ, Bollinger, JJ, Itano, WM & Heinzen, DJ Pressed atomic states and projection noise in spectroscopy. Phys. Rev. a 50, 67-88 (1994).
Kitagawa, M. & Ueda, M. Pressed spin states. Phys. Rev. a 47, 5138-5143 (1993).
Hamley, CD, Gerving, C., Hoang, T., Bookjans, E. & Chapman, MS Spin-nematic compressed vacuum in a quantum gas. Wet. Phys. 8, 305–308 (2012).
Leroux, ID, Schleier-Smith, MH & Vuletić, V. Orientation-dependent entanglement in a pressed atomic clock. Phys. Rev. Lett. 104, 250801 (2010).
Wineland, DJ et al. Experimental problems in coherent manipulation of the quantum state of trapped atomic ions. J. Res. Natl. Inst. Stand. Technol. 103, 259-328 (1998).
Braverman, B., Kawasaki, A. & Vuletić, V. Impact of non-unitary spin pinches on atomic clock performance. New J. Phys. 20, 103019 (2018).
Matei, DG et al. 1.5μm lasers with a line width of less than 10 MHz. Phys. Rev. Lett. 118, 263202 (2017).
Hu, L., Poli, N., Salvi, L. & Tino, GM Atom interferometry with the Sr optical clock transition. Phys. Rev. Lett. 119, 263601 (2017).
Pospelov, M. et al. Detect domain walls of axion-like models using terrestrial experiments. Phys. Rev. Lett. 110, 021803 (2013).
Riehle, F. Optical Clock Networks. Wet. Photon. 11, 25-31 (2017).
Al-Masoudi, A., Dörscher, S., Häfner, S., Sterr, U. & Lisdat, C. Noise and instability of an optical lattice clock. Phys. Rev. a 92, 063814 (2015).
Kawasaki, A. et al. Geometrically asymmetric optical cavity for strong atom-photon coupling. Phys. Rev. a 99, 013437 (2019).
Blatt, S. et al. Rabi spectroscopy and excitation inhomogeneity in a one-dimensional lattice optical clock. Phys. Rev. a 80, 052703 (2009).
Vallet, G. et al .; A noise immune cavity assisted nondestructive detection for an optical lattice clock in the quantum regime. New J. Phys. 19, 083002 (2017).
Yamoah, M. et al. Robust kHz linewidth divided Bragg reflector laser with optoelectronic feedback. Opt. to express 27, 37714-37720 (2019).
Zhang, W. et al .; Residual amplitude modulation reduction to 1 × 10-6 for frequency modulation and laser stabilization. Opt. Lett. 39, 1980-1983 (2014).
Śliwczyński, Ł., Krehlik, P., Czubla, A., Buczek, Ł. & Lipiński, M. Spreading time and RF frequency over a stabilized fiber optic link over a distance of 420 km. Metrologia 50, 133 (2013).
Lee, W. et al .; Ultra-stable, room-temperature optical cavity laser system with 4.8 x 10-17 thermal noise limit. In 2019 Joint Conference of the IEEE International Frequency Control Symposium and the European Frequency and Time Forum 1–2 (IEEE, 2019).