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On a New Class of Self-Referencing, 1/τ Atomic Clocks |
WANG Li-Jun** |
1Department of Physics, Tsinghua University, Beijing 100084 2Joint Institute for Measurement Science (JMI), Tsinghua University, Beijing 100084 3Department of Precision Instrument, Tsinghua University, Beijing 100084 4National Institute of Metrology of China, Beijing 100013
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Cite this article: |
WANG Li-Jun 2014 Chin. Phys. Lett. 31 080601 |
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Abstract The merit of a modern atomic clock is measured by its phase stability. A clock's absolute time-keeping uncertainty typically worsens over its operating time τ as Δτ∝√τ, with an Allan deviation of σy (τ)=Δτ/τ∝τ?1/2. Here we analyze a new class of self-referencing clocks, whose phase is locked to itself after a certain time delay. We show that the Allan deviation of such clocks decreases as 1/τ over a long and controllable operating time. This class of clocks can maintain synchronization over a prolonged period with only a fixed, almost non-increasing, absolute uncertainty, forming an ideal time-piece.
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Published: 28 July 2014
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[1] Essen L and Parry J V L 1955 Nature 176 280[2] Heavner T P, Jefferts S R, Donley E A, Shirley J H and Parker T E 2005 Metrologia 42 411[3] Ovchinnikov Y and Marra G 2011 Metrologia 48 87[4] Guena J, Abgrall M, Rovera D, Laurent P, Chupin B, Lours M, Santarelli G, Rosenbusch P, Tobar M E, Ruoxin L, Gibble K, Clairon A and Bize S 2012 IEEE Trans. Ultrason. Ferroelectrics Frequency Control. 59 391[5] http://www.bipm.org/CCTF/12-18 2012[6] Chou C W, Hume D B, Koelemeij J C J, Wineland D J and Rosenband T 2010 Phys. Rev. Lett. 104 070802[7] Hinkley N, Sherman J A, Phillips N B, Schioppo M, Lemke N D, Beloy K, Pizzocaro M, Oates C W and Ludlow A D 2013 Science 341 1215[8] Bloom B J, Nicholson T L, Williams J R, Campbell S L, Bishof M, Zhang X, Zhang W, Bromley S L and Ye J 2014 Nature 506 71[9] Riehle F 2004 Frequency Standards: Basics and Applications (Wiley-VCH, Weinheim)[10] Dick G J 1987 Proc. 19th Precise Time and Time Interval (PTTI) Applications and Planning Meeting (Redondo Beach, California, USA 1–3 December 1987) pp 133–147[11] Kleppner D, Goldenberg H M and Ramsey N F 1962 Phys. Rev. 126 603[12] Shiga N and Takeuchi M 2012 New J. Phys. 14 023034[13] Biedermann G W, Takase K, Wu X, Deslauriers L, Roy S and Kasevich M A 2013 Phys. Rev. Lett. 111 170802[14] Leeson D B 1966 Proc. IEEE 54 329 |
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