Surface-electrode Paul trap with optimized near-field microwave control
- 533 Downloads
We describe the design of a microfabricated Paul trap with integrated microwave conductors for quantum simulation and entangling logic gates. We focus on an approach where near-field amplitude gradients of microwave fields from conductors in the trap structure induce the required spin-motional couplings. This necessitates a strong amplitude gradient of the microwave near-field at the position of the ions, while the field itself needs to be suppressed as much as possible. We introduce a single meander-like microwave conductor structure which provides the desired field configuration. We optimize its parameters through full-wave microwave numerical simulations of the near-fields. The microwave conductor is integrated with additional dc and rf electrodes to form the actual Paul trap. We discuss the influence of the additional electrodes on the field configuration. To be able to fine-tune the overlap of the Paul trap rf null with the microwave field minimum, our trap design allows relative tuning of trap rf electrode amplitudes. Our optimized geometry could achieve a ratio of sideband-to-carrier excitations comparable to experiments with focused laser beams.
KeywordsMicrowave Field Paul Trap Electrode Size Residual Field Field Minimum
We thank D.T.C. Allcock, Y. Colombe, D. Leibfried, J. Schöbel, D. Slichter, U. Warring, and D. J. Wineland for helpful discussions. We acknowledge funding from QUEST, NTH, PTB, and LUH.
- 4.C. Monroe, J. Kim, Scaling the ion trap quantum processor. Science 339(6124), 1164–1169 (2013). PMID: 23471398Google Scholar
- 11.S. Seidelin, J. Chiaverini, R. Reichle, J.J. Bollinger, D. Leibfried, J. Britton, J.H. Wesenberg, R.B. Blakestad, R.J. Epstein, D.B. Hume, W.M. Itano, J.D. Jost, C. Langer, R. Ozeri, N. Shiga, D.J. Wineland, Microfabricated surface-electrode ion trap for scalable quantum information processing. Phys. Rev. Lett. 96(25), 253003 (2006)ADSCrossRefGoogle Scholar
- 18.D.T.C. Allcock, T.P. Harty, C.J. Ballance, N.M. Linke, H.A. Janacek, L. Guidoni, D.P.L. Aude Craik, D.N. Stacey, A.M. Steane and D.M. Lucas (2012) Microwave driven quantum logic gates in 43Ca+. European Conference on Trapped Ions. Obergurgl, AustriaGoogle Scholar
- 19.Q.A. Turchette, D. Kielpinski, B.E. King, D. Leibfried, D.M. Meekhof, C.J. Myatt, M.A. Rowe, C.A. Sackett, C.S. Wood, W.M. Itano, C. Monroe, D.J. Wineland, Heating of trapped ions from the quantum ground state. Phys. Rev. A, 61(6), 063418 (2000)Google Scholar
- 23.D.A. Hite, Y. Colombe, A.C. Wilson, K.R. Brown, U. Warring, R. Jördens, J.D. Jost, K.S. McKay, D.P. Pappas, D. Leibfried, D.J. Wineland, 100-fold reduction of electric-field noise in an ion trap cleaned with in situ argon-ion-beam bombardment. Phys. Rev. Lett. 109(10), 103001 (2012)ADSCrossRefGoogle Scholar
- 25.D.T.C. Allcock (2011) Surface-Electrode Ion Traps for Scalable Quantum Computing. PhD thesis, Hertford College, OxfordGoogle Scholar
- 26.D.T.C. Allcock, T.P. Harty, C.J. Ballance, B.C. Keitch, N.M. Linke, D.N. Stacey, D.M. Lucas, A microfabricated ion trap with integrated microwave circuitry. Appl. Phys. Lett. 102(4), 044103 (2013)Google Scholar