Radio-frequency-spectroscopy measurement of the LandégJfactor of the5D5/2state of Ba

Matthew Hoffman

¹

,

Thomas Noël

²

,

Carolyn Auchter

³

et al.

Precision measurements on the $^{138}$Ba$^+$ $6s^2S_{1/2}-5d^2D_{5/2}$ clock transition

“…A recently reported measurement of 146 114 384.0(1) MHz for the S 1/2 − D 5/2 transition [31], together with fine structure splitting of 24 012 048 319(1) kHz [19], is consistent with our result albeit limited by the 100 kHz uncertainty of [31]. Our value for g D is in agreement with the value reported in [10] and resolves the discrepancy with the value reported in [11]. We have also demonstrated the influence that ac-magnetic fields arising from rf-currents in the electrodes can have on g J -factor measurements.…”

“…Being a monovalent atom, it is also amenable to precise theoretical predictions of atomic properties [6,7], making it a testbed for theoretical and experimental techniques. This has lead to high accuracy measurement of a variety of atomic properties including Landè g-factors [8][9][10][11], matrix elements [12,13], branching ratios from the P 1/2 and P 3/2 levels [14][15][16], lifetime measurements of the lower lying metastable D-states [17,18], fine-structure splittings [19] and hyperfine structure of odd isotopes [20,21].…”

Fabrication of ion-trap electrodes by self-terminated electrochemical etching

“…Needle electrode is one of the most common geometries of electrodes used in Paul traps for trapped ion quantum information processing (QIP) [1][2][3][4][5][6][7][8][9][10]. As examples, three different Paul traps, including the 3-fork needle trap [10], the "tack" trap [5], and the linear Paul trap [11], are shown in Fig.…”