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V I Yudin - One of the best experts on this subject based on the ideXlab platform.

  • Cosmological Gravimetry Using High-Precision Atomic Clocks
    arXiv: General Physics, 2017
    Co-Authors: V I Yudin, Alexey V. Taichenachev
    Abstract:

    In this paper, a hypothesis that the cosmological gravitational potential can be measured with the use of high-precision Atomic Clocks is proposed and substantiated. The consideration is made with the use of a quasi-classical description of the gravitational shift that lies in the frame of nonmetric theories of gravity. It is assumed that the cosmological potential is formed by all matter of the Universe (including dark matter and dark energy) and that it is spatially uniform on planet scales. It is obvious that the cosmological potential, $\Phi_\text{CP}$, is several orders of magnitude greater than Earth's gravitational potential $\varphi_\text{E}$ (where $|\varphi_\text{E}/c^2|\sim 10^{-9}$ on Earth's surface). In our method, the tick rates of identical Atomic Clocks are compared at two points with different gravitational potentials, i.e. at different heights. In this case, the information on $\Phi_\text{CP}$ is contained in the cosmological correction $\alpha\neq 0$ in the relationship $\Delta\omega/\omega=(1+\alpha)\Delta \varphi/c^2$ between the relative change of the frequencies $\Delta \omega/\omega$ (in Atomic Clocks) and the difference of the gravitational potential $\Delta \varphi$ at the measurement points. We have estimated the low limit of cosmological correction, $\alpha >10^{-6}$. It is shown that using a modern Atomic clock of the optical range it is possible to measure the value of $\alpha$ in earth-based experiments if $|\alpha|>10^{-5}$. The obtained results, in the case of their experimental confirmation, will open up new unique opportunities for the study of the Universe and the testing of various cosmological models. These results will also increase the measurement accuracy in relativistic geodesy, chronometric gravimetry, global navigation systems, and global networks of Atomic Clocks.

  • Atomic Clocks with suppressed blackbody radiation shift
    Physical Review Letters, 2011
    Co-Authors: V I Yudin, A V Taichenachev, M V Okhapkin, S N Bagayev, Chr Tamm, E Peik, N Huntemann, T E Mehlstaubler, F Riehle
    Abstract:

    : We develop a concept of Atomic Clocks where the blackbody radiation shift and its fluctuations can be suppressed by 1-3 orders of magnitude independent of the environmental temperature. The suppression is based on the fact that in a system with two accessible clock transitions (with frequencies ν1 and ν2) which are exposed to the same thermal environment, there exists a "synthetic" frequency ν(syn) ∝ (ν1 - e12ν2) largely immune to the blackbody radiation shift. For example, in the case of 171Yb+ it is possible to create a synthetic-frequency-based clock in which the fractional blackbody radiation shift can be suppressed to the level of 10(-18) in a broad interval near room temperature (300±15  K). We also propose a realization of our method with the use of an optical frequency comb generator stabilized to both frequencies ν1 and ν2, where the frequency ν(syn) is generated as one of the components of the comb spectrum.

  • Atomic Clocks with suppressed blackbody radiation shift
    Physical Review Letters, 2011
    Co-Authors: V I Yudin, A V Taichenachev, M V Okhapkin, S N Bagayev, Chr Tamm, E Peik
    Abstract:

    We develop a concept of Atomic Clocks where the blackbody radiation shift and its fluctuations can be suppressed by 1--3 orders of magnitude independent of the environmental temperature. The suppression is based on the fact that in a system with two accessible clock transitions (with frequencies ${\ensuremath{\nu}}_{1}$ and ${\ensuremath{\nu}}_{2}$) which are exposed to the same thermal environment, there exists a ``synthetic'' frequency ${\ensuremath{\nu}}_{\mathrm{syn}}$ $\ensuremath{\propto}$ (${\ensuremath{\nu}}_{1}\ensuremath{-}{\ensuremath{\epsilon}}_{12}{\ensuremath{\nu}}_{2}$) largely immune to the blackbody radiation shift. For example, in the case of $^{171}\mathrm{Yb}^{+}$ it is possible to create a synthetic-frequency-based clock in which the fractional blackbody radiation shift can be suppressed to the level of ${10}^{\ensuremath{-}18}$ in a broad interval near room temperature ($300\ifmmode\pm\else\textpm\fi{}15\text{ }\text{ }\mathrm{K}$). We also propose a realization of our method with the use of an optical frequency comb generator stabilized to both frequencies ${\ensuremath{\nu}}_{1}$ and ${\ensuremath{\nu}}_{2}$, where the frequency ${\ensuremath{\nu}}_{\mathrm{syn}}$ is generated as one of the components of the comb spectrum.

A V Taichenachev - One of the best experts on this subject based on the ideXlab platform.

  • Atomic Clocks with suppressed blackbody radiation shift
    Physical Review Letters, 2011
    Co-Authors: V I Yudin, A V Taichenachev, M V Okhapkin, S N Bagayev, Chr Tamm, E Peik, N Huntemann, T E Mehlstaubler, F Riehle
    Abstract:

    : We develop a concept of Atomic Clocks where the blackbody radiation shift and its fluctuations can be suppressed by 1-3 orders of magnitude independent of the environmental temperature. The suppression is based on the fact that in a system with two accessible clock transitions (with frequencies ν1 and ν2) which are exposed to the same thermal environment, there exists a "synthetic" frequency ν(syn) ∝ (ν1 - e12ν2) largely immune to the blackbody radiation shift. For example, in the case of 171Yb+ it is possible to create a synthetic-frequency-based clock in which the fractional blackbody radiation shift can be suppressed to the level of 10(-18) in a broad interval near room temperature (300±15  K). We also propose a realization of our method with the use of an optical frequency comb generator stabilized to both frequencies ν1 and ν2, where the frequency ν(syn) is generated as one of the components of the comb spectrum.

  • Atomic Clocks with suppressed blackbody radiation shift
    Physical Review Letters, 2011
    Co-Authors: V I Yudin, A V Taichenachev, M V Okhapkin, S N Bagayev, Chr Tamm, E Peik
    Abstract:

    We develop a concept of Atomic Clocks where the blackbody radiation shift and its fluctuations can be suppressed by 1--3 orders of magnitude independent of the environmental temperature. The suppression is based on the fact that in a system with two accessible clock transitions (with frequencies ${\ensuremath{\nu}}_{1}$ and ${\ensuremath{\nu}}_{2}$) which are exposed to the same thermal environment, there exists a ``synthetic'' frequency ${\ensuremath{\nu}}_{\mathrm{syn}}$ $\ensuremath{\propto}$ (${\ensuremath{\nu}}_{1}\ensuremath{-}{\ensuremath{\epsilon}}_{12}{\ensuremath{\nu}}_{2}$) largely immune to the blackbody radiation shift. For example, in the case of $^{171}\mathrm{Yb}^{+}$ it is possible to create a synthetic-frequency-based clock in which the fractional blackbody radiation shift can be suppressed to the level of ${10}^{\ensuremath{-}18}$ in a broad interval near room temperature ($300\ifmmode\pm\else\textpm\fi{}15\text{ }\text{ }\mathrm{K}$). We also propose a realization of our method with the use of an optical frequency comb generator stabilized to both frequencies ${\ensuremath{\nu}}_{1}$ and ${\ensuremath{\nu}}_{2}$, where the frequency ${\ensuremath{\nu}}_{\mathrm{syn}}$ is generated as one of the components of the comb spectrum.

  • three photon absorption resonance for all optical Atomic Clocks
    Physical Review A, 2005
    Co-Authors: S A Zibrov, A V Taichenachev, Irina Novikova, David F Phillips, Valeriy I Yudin, Ronald L Walsworth, A S Zibrov
    Abstract:

    We report an experimental study of an all-optical three-photon-absorption resonance (known as an ``$N$ resonance'') and discuss its potential application as an alternative to Atomic Clocks based on coherent population trapping. We present measurements of the $N$-resonance contrast, width and light shift for the ${D}_{1}$ line of $^{87}\mathrm{Rb}$ with varying buffer gases, and find good agreement with an analytical model of this resonance. The results suggest that $N$ resonances are promising for Atomic clock applications.

F Riehle - One of the best experts on this subject based on the ideXlab platform.

  • Optical Atomic Clocks for a Future New Definition of the Second
    CLEO: 2014, 2014
    Co-Authors: F Riehle
    Abstract:

    Optical Atomic Clocks outperform the best caesium Atomic Clocks which define the second wrt accuracy and stability. As secondary representations of the second they pave the way to a new definition of the time unit.

  • Optical Atomic Clocks Could Redefine Unit of Time
    Physics, 2012
    Co-Authors: F Riehle
    Abstract:

    Optical Atomic Clocks now outperform the best microwave cesium Atomic Clocks in terms of precision.

  • Viewpoint: Optical Atomic Clocks Could Redefine Unit of Time
    Physics, 2012
    Co-Authors: F Riehle
    Abstract:

    Optical Atomic Clocks now outperform the best microwave cesium Atomic Clocks in terms of precision.

  • Atomic Clocks with suppressed blackbody radiation shift
    Physical Review Letters, 2011
    Co-Authors: V I Yudin, A V Taichenachev, M V Okhapkin, S N Bagayev, Chr Tamm, E Peik, N Huntemann, T E Mehlstaubler, F Riehle
    Abstract:

    : We develop a concept of Atomic Clocks where the blackbody radiation shift and its fluctuations can be suppressed by 1-3 orders of magnitude independent of the environmental temperature. The suppression is based on the fact that in a system with two accessible clock transitions (with frequencies ν1 and ν2) which are exposed to the same thermal environment, there exists a "synthetic" frequency ν(syn) ∝ (ν1 - e12ν2) largely immune to the blackbody radiation shift. For example, in the case of 171Yb+ it is possible to create a synthetic-frequency-based clock in which the fractional blackbody radiation shift can be suppressed to the level of 10(-18) in a broad interval near room temperature (300±15  K). We also propose a realization of our method with the use of an optical frequency comb generator stabilized to both frequencies ν1 and ν2, where the frequency ν(syn) is generated as one of the components of the comb spectrum.

  • Atomic Clocks speed up
    Physics World, 2001
    Co-Authors: F Riehle
    Abstract:

    Accurate Clocks contribute to science, technology and trade to an extent that can hardly be overestimated. The most successful applications of Atomic Clocks include the global positioning system (GPS) of satellites for navigation, and also the international basis of timekeeping, known as the coordinated universal timescale or UTC. Atomic Clocks are also used in precision tests of fundamental theories, such as quantum electrodynamics and general relativity.

E Peik - One of the best experts on this subject based on the ideXlab platform.

  • Atomic Clocks with suppressed blackbody radiation shift
    Physical Review Letters, 2011
    Co-Authors: V I Yudin, A V Taichenachev, M V Okhapkin, S N Bagayev, Chr Tamm, E Peik, N Huntemann, T E Mehlstaubler, F Riehle
    Abstract:

    : We develop a concept of Atomic Clocks where the blackbody radiation shift and its fluctuations can be suppressed by 1-3 orders of magnitude independent of the environmental temperature. The suppression is based on the fact that in a system with two accessible clock transitions (with frequencies ν1 and ν2) which are exposed to the same thermal environment, there exists a "synthetic" frequency ν(syn) ∝ (ν1 - e12ν2) largely immune to the blackbody radiation shift. For example, in the case of 171Yb+ it is possible to create a synthetic-frequency-based clock in which the fractional blackbody radiation shift can be suppressed to the level of 10(-18) in a broad interval near room temperature (300±15  K). We also propose a realization of our method with the use of an optical frequency comb generator stabilized to both frequencies ν1 and ν2, where the frequency ν(syn) is generated as one of the components of the comb spectrum.

  • Atomic Clocks with suppressed blackbody radiation shift
    Physical Review Letters, 2011
    Co-Authors: V I Yudin, A V Taichenachev, M V Okhapkin, S N Bagayev, Chr Tamm, E Peik
    Abstract:

    We develop a concept of Atomic Clocks where the blackbody radiation shift and its fluctuations can be suppressed by 1--3 orders of magnitude independent of the environmental temperature. The suppression is based on the fact that in a system with two accessible clock transitions (with frequencies ${\ensuremath{\nu}}_{1}$ and ${\ensuremath{\nu}}_{2}$) which are exposed to the same thermal environment, there exists a ``synthetic'' frequency ${\ensuremath{\nu}}_{\mathrm{syn}}$ $\ensuremath{\propto}$ (${\ensuremath{\nu}}_{1}\ensuremath{-}{\ensuremath{\epsilon}}_{12}{\ensuremath{\nu}}_{2}$) largely immune to the blackbody radiation shift. For example, in the case of $^{171}\mathrm{Yb}^{+}$ it is possible to create a synthetic-frequency-based clock in which the fractional blackbody radiation shift can be suppressed to the level of ${10}^{\ensuremath{-}18}$ in a broad interval near room temperature ($300\ifmmode\pm\else\textpm\fi{}15\text{ }\text{ }\mathrm{K}$). We also propose a realization of our method with the use of an optical frequency comb generator stabilized to both frequencies ${\ensuremath{\nu}}_{1}$ and ${\ensuremath{\nu}}_{2}$, where the frequency ${\ensuremath{\nu}}_{\mathrm{syn}}$ is generated as one of the components of the comb spectrum.

M V Okhapkin - One of the best experts on this subject based on the ideXlab platform.

  • Atomic Clocks with suppressed blackbody radiation shift
    Physical Review Letters, 2011
    Co-Authors: V I Yudin, A V Taichenachev, M V Okhapkin, S N Bagayev, Chr Tamm, E Peik, N Huntemann, T E Mehlstaubler, F Riehle
    Abstract:

    : We develop a concept of Atomic Clocks where the blackbody radiation shift and its fluctuations can be suppressed by 1-3 orders of magnitude independent of the environmental temperature. The suppression is based on the fact that in a system with two accessible clock transitions (with frequencies ν1 and ν2) which are exposed to the same thermal environment, there exists a "synthetic" frequency ν(syn) ∝ (ν1 - e12ν2) largely immune to the blackbody radiation shift. For example, in the case of 171Yb+ it is possible to create a synthetic-frequency-based clock in which the fractional blackbody radiation shift can be suppressed to the level of 10(-18) in a broad interval near room temperature (300±15  K). We also propose a realization of our method with the use of an optical frequency comb generator stabilized to both frequencies ν1 and ν2, where the frequency ν(syn) is generated as one of the components of the comb spectrum.

  • Atomic Clocks with suppressed blackbody radiation shift
    Physical Review Letters, 2011
    Co-Authors: V I Yudin, A V Taichenachev, M V Okhapkin, S N Bagayev, Chr Tamm, E Peik
    Abstract:

    We develop a concept of Atomic Clocks where the blackbody radiation shift and its fluctuations can be suppressed by 1--3 orders of magnitude independent of the environmental temperature. The suppression is based on the fact that in a system with two accessible clock transitions (with frequencies ${\ensuremath{\nu}}_{1}$ and ${\ensuremath{\nu}}_{2}$) which are exposed to the same thermal environment, there exists a ``synthetic'' frequency ${\ensuremath{\nu}}_{\mathrm{syn}}$ $\ensuremath{\propto}$ (${\ensuremath{\nu}}_{1}\ensuremath{-}{\ensuremath{\epsilon}}_{12}{\ensuremath{\nu}}_{2}$) largely immune to the blackbody radiation shift. For example, in the case of $^{171}\mathrm{Yb}^{+}$ it is possible to create a synthetic-frequency-based clock in which the fractional blackbody radiation shift can be suppressed to the level of ${10}^{\ensuremath{-}18}$ in a broad interval near room temperature ($300\ifmmode\pm\else\textpm\fi{}15\text{ }\text{ }\mathrm{K}$). We also propose a realization of our method with the use of an optical frequency comb generator stabilized to both frequencies ${\ensuremath{\nu}}_{1}$ and ${\ensuremath{\nu}}_{2}$, where the frequency ${\ensuremath{\nu}}_{\mathrm{syn}}$ is generated as one of the components of the comb spectrum.