Work

Accelerating the averaging rate of atomic ensemble clock stability using atomic phase lock

Year: 2014

Type: article

Abstract: We experimentally demonstrated that the stability of an atomic clock improves at its fastest rate τ −1 (where τ is the averaging time) when the phase of a local oscillator is genuinely compared to the continuous phase of many atoms in a single trap (an atomic phase lock). For this demonstration, we developed a simple method that repeatedly monitors the atomic phase while retaining its coherence by observing only a portion of the whole ion cloud. Using this new method, we measured the continuous phase over three measurement cycles, and thereby improved the stability scaling from to τ −1 during the three measurement cycles. This simple method provides a path by which atomic clocks can approach a quantum projection noise limit, even when the measurement noise is dominated by the technical noise.

Source: New Journal of Physics

DOI: 10.1088/1367-2630/16/7/073029

Authors: Nobuyasu Shiga, Michiaki Mizuno, Kohta Kido, Piyaphat Phoonthong, Kunihiro Okada

Institutions: Japan Science and Technology Agency, National Institute of Information and Communications Technology, National Institute of Metrology (Thailand), Sophia University

Language: English

Topic: Advanced Frequency and Time Standards

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,610

Funders: National Institute of Information and Communications Technology, Precursory Research for Embryonic Science and Technology