An optimized ion trap geometry to measure quadrupole shifts of 171Yb+ clocks

doi:10.1088/1674-1056/25/11/113703

Abstract

We propose a new ion-trap geometry to carry out accurate measurements of the quadrupole shifts in the ¹⁷¹Yb ion. This trap will minimize the quadrupole shift due to the harmonic component of the confining potential by an order of magnitude. This will be useful to reduce the uncertainties in the clock frequency measurements of the 6s ²S_1/2→4f¹³6s² ²F_7/2 and 6s ²S_1/2→5d ²D_3/2 transitions, from which we can deduce the precise values of the quadrupole moments (Θs) of the 4f¹³6s² ²F_7/2 and 5d ²D_3/2 states. Moreover, it may be able to affirm the validity of the measured Θ value of the 4f¹³6s² ²F_7/2 state, for which three independent theoretical studies defer almost by one order of magnitude from the measurement. We also calculate Θs using the relativistic coupled-cluster (RCC) method. We use these Θ values to estimate the quadrupole shift that can be measured in our proposed ion trap experiment.

Keywords: ion-trap frequency metrology atomic clock systematic uncertainties

Received: 20 June 2016
Revised: 20 June 2016
Accepted manuscript online:

PACS:	37.10.Ty	(Ion trapping)
	32.60.+i	(Zeeman and Stark effects)
	31.15.&ndash
	p
	37.10.&ndash
	x

Corresponding Authors: S De
E-mail: subhadeep@mail.nplindia.org

Cite this article:

N Batra, B K Sahoo, S De An optimized ion trap geometry to measure quadrupole shifts of ¹⁷¹Yb+ clocks 2016 Chin. Phys. B 25 113703

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An optimized ion trap geometry to measure quadrupole shifts of 171Yb+ clocks

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An optimized ion trap geometry to measure quadrupole shifts of ¹⁷¹Yb+ clocks