Setup of a dipole trap for all-optical trapping*

Abstract

Micromotion induced by the radio-frequency field contributes greatly to the systematic frequency shifts of optical frequency standards. Although different strategies for mitigating this effect have been proposed, trapping ions optically has the potential to provide a generic solution to the elimination of micromotion. This could be achieved by trapping a single ion in the dipole trap composed of a highpower laser field. Here, we present the setup of the dipole trap composed of a 532 nm laser at a power of 10 W aiming to optically trap a single 40Ca+ and we observe an AC-Stark shift of the fluorescence spectrum line of ∼22 MHz caused by the 532 nm dipole beam. The beam waist of the dipole laser is several microns, which would provide a dipole potential strong enough for all-optical trapping of a single 40Ca+ ion.

FPGA based hardware platform for trapped-ion-based multi-level quantum systems

“…The trapped-ion system [1][2][3][4][5] has been recognized as a potential platform for quantum simulation, [6][7][8][9][10][11] quantum computing, [12][13][14][15] quantum networking, [16] quantum sensing, [17,18] and quantum logic clock, [19][20][21] contributed by the favorable properties such as long coherence time, [24,25] near-perfect state preparation and readout, [24,25] and highfidelity quantum logic gate operations. [26,27] The trapped-ionbased two-level system have been used as a potential platform for quantum computation and quantum simulation, [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] whereas the multi-level quantum systems can provide a larger capacity to store process information. [28] The quantum controls for multi-level quantum system and high-dimensional quantum simulation are new research fields of the trappedions.…”