Thick-film technology for ultra high vacuum interfaces of micro-structured traps

Abstract

We adopt thick-film technology to produce ultra high vacuum compatible interfaces for electrical signals. These interfaces permit voltages of hundreds of volts and currents of several amperes and allow for very compact vacuum setups, useful in quantum optics in general, and in particular for quantum information science using miniaturized traps for ions (Kielpinski et al. in Nature 417:709, 2002) or neutral atoms (Folman et al. circuits can also be useful as pure in-vacuum devices. We demonstrate a specific interface which provides 11 current feedthroughs, more than 70 dc feedthroughs and a feedthrough for radio frequencies. We achieve a pressure in the low 10 −11 mbar range and demonstrate the full functionality of the interface by trapping chains of cold ytterbium ions, which requires the presence of all of the above mentioned signals. In order to supply precise time-dependent voltages to the ion trap, a versatile multi-channel device has been developed.

Ion-trajectory analysis for micromotion minimization and the measurement of small forces

“…The full trap features 33 pairs of dc electrodes composing a wide section (described above) and a narrow section (electrode width, 100 µm;ŷ separation, 250 µm) that are connected by a tapered transfer section. The trap and the supporting experimental setup have been described in detail in [36,47,48]. All traces converge to the rf node (filled black circle) in the limit of infinite rf power.…”

“…This matching can always be achieved by the choice of rf powers that are sampled during the minimization process. In our particular setup the trap is composed of gold-plated aluminium oxide glued and wire-bonded to an actively cooled aluminium oxide holder [47]. Given the low thermal resistivity of our trap-holder setup and its good thermal coupling to the cooling system, we estimate the time constant for temperature changes of the trap-holder system to be large compared to the time between changes in the rf power for our measurements (a few tens of milliseconds).…”

Adiabatic quantum simulation with a segmented ion trap: Application to long-distance entanglement in quantum spin systems

“…To be specific, we present detailed calculations for an existing microstructured ion trap [21,22]. The principles used to obtain the concrete results presented in what follows are, of course, applicable to other segmented traps with a magnetic gradient as well.…”

Implementation of chiral quantum optics with Rydberg and trapped-ion setups

“…, N B [65], ε 0 is the vacuum permittivity, and we have assumed |J lj | ω x to neglect counter-rotating terms in Eq. [66][67][68] or in segmented ion traps [69,70]. In that case, the bath Hamiltonian H B is diagonalized by the momentum modes b k with the dispersion ω k as given in Eq.…”