An Atomic Standard of Frequency and Time Interval: A Cæsium Resonator

  title={An Atomic Standard of Frequency and Time Interval: A C{\ae}sium Resonator},
  author={Louis Essen and J. V. L. Parry},
Ramsey Interference with Single Photons.
This work experimentally generates energy superposition states of a single photon and manipulates them with unitary transformations to realize arbitrary projective measurements and opens the path for frequency-encoded photonic qubits in quantum information processing and quantum communication.
Cold atom space clock with counter-propagating atoms
We discuss the feasibility of realizing a cold atom space clock with counter-propagating cold atoms in microgravity. The design of the space clock is based on an atomic beam clock with Ramsey cavity,
Molecular spins clock in
Electron spin relaxation, important in quantum information science, can be slowed down at clock transitions — which are insensitive to magnetic noise. It has now been shown that such transitions can
SU(2) hyper-clocks: Quantum engineering of spinor interferences for time and frequency metrology
In 1949, Ramsey’s method of separated oscillating fields was elaborated boosting over many decades metrological performances of atomic clocks and becoming the standard technique for very high
Planar-Integrated Magneto-Optical Trap
The magneto-optical trap (MOT) is an essential tool for collecting and preparing cold atoms with a wide range of applications. We demonstrate a planar-integrated MOT by combining an optical grating
Adsorption of cesium from waste desalination brine through Dowex G26 resin and comparison with t-BAMBP/kerosene and t-BAMBP/C2mimNTf2 systems
Cesium can be widely used in many industries now. However, the primary reservoir of cesium is often located in high mountains and deserts, so it is challenging to obtain cesium resources. To solve
SU(2) hyper-clocks with optimal quantum control of composite phase-shifts
T. Zanon-Willette, 2, 3 D. Wilkowski, 3, 4 A.V. Taichenachev, 6 and V.I. Yudin 6, 7 Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75005, Paris, France∗ MajuLab,
Measurement of the tune-out wavelength for Cs133 at 880 nm
Apichayaporn Ratkata, Philip D. Gregory, Andrew D. Innes, Jonas A. Matthies, Lewis A. McArd, Jonathan M. Mortlock, M. S. Safronova, Sarah L. Bromley, and Simon L. Cornish1∗ Joint Quantum Centre (JQC)


  • Harold Lyons
  • Physics
    Annals of the New York Academy of Sciences
  • 1952
Although the problems involved in the design of accurate and reliable frequency and time standards are somewhat different, these two topics will be dealt with together since a clock can be used as a frequencyStandard while a frequency standard by itself will not read time.
World-wide Frequency and Time Comparisons by Means of Radio Transmissions
FOR many years standards of frequency have been made available to users over a wide area by means of radio transmissions, the carrier waves of which are controlled by the standard; and the