Quantum Computing & Sensing

CIPHER’s Quantum Systems Division (QSD) investigates quantum computing systems based on individual trapped atomic ions and novel quantum sensor devices based on atomic systems. QSD has designed, fabricated, and demonstrated a number of ion traps and state-of-the-art components to support integrated quantum information systems. Current efforts focus on implementing small quantum algorithms in these devices with the goal of better understanding the effects of noise on fidelity of the algorithms. Additional topics of investigation include chip-scale atomic magnetometers, atomic clocks, cold-atom gyroscopes, and quantum-secured communications.



   Quantum Process Tomography of a Mölmer-Sörensen Gate via a Global BeamQCS figure 1 
   H. N. Tinkey, A. M. Meier, C. R. Clark, C. M. Seck, and K. R. Brown, ArXiv:2101.04648  [Physics, Physics:Quant-Ph] (2021).


figure 4    Wavelength-Insensitive, Multispecies Entangling Gate for Group-2 Atomic Ions
    B. C.   Sawyer and K. R. Brown, Phys. Rev. A 103, 022427 (2021).    


QCS figure 2
   Bridging Classical and Quantum with SDP Initialized Warm-Starts for QAOA
   R. Tate, M. Farhadi, C. Herold, G. Mohler, and S. Gupta, ArXiv:2010.14021 [Quant-Ph] (2020).  



qcs figure 3   Single-Ion Addressing via Trap Potential Modulation in Global Optical Fields
  C. M. Seck, A. M. Meier, J. T. Merrill, H. T. Hayden, B. C. Sawyer, C. E. Volin, and K. R. Brown, New J. Phys. 22, 053024  (2020).   



Generating Target Graph Couplings for QAOA from Native Quantum Hardware CouplingsQCS figure 5 
J. Rajakumar, J. Moondra, S. Gupta, and C. D. Herold, ArXiv:2011.08165 [Physics, Physics:Quant-Ph] (2020).



QCS figure 6

All-Optical Intrinsic Atomic Gradiometer with Sub-20 fT/Hz^0.5 sensitivity in a 22 uT Earth-Scale Magnetic Field 
A. R. Perry, M. D. Bulatowicz, M. D. Bulatowicz, M. Larsen, T. G. Walker, and R. Wyllie, Opt. Express, OE 28, 36696 (2020).


qcs figure 7 Doppler-Cooled Ions in a Compact Reconfigurable Penning Trap
 B. J. McMahon, C. Volin, W. G. Rellergert, and B. C. Sawyer, Phys. Rev. A 101, 013408 (2020).




qcs figure 8 Testing the Robustness of Robust Phase Estimation
 A. M. Meier, K. A. Burkhardt, B. J. McMahon, and C. D. Herold, Rev. A 100, 052106 (2019). https://link.aps.org/doi/10.1103/PhysRevA.100.052106



qcs figure 9Scalable Ion–Photon Quantum Interface Based on Integrated Diffractive Mirrors
M. Ghadimi, V. Blūms, B. G. Norton, P. M. Fisher, S. C. Connell, J. M. Amini, C. Volin, H. Hayden, C.-S. Pai, D. Kielpinski, M. Lobino, and E. W. Streed, Npj Quantum Information 3, 4 (2017). https://www.nature.com/articles/s41534-017-0006-6



qcs figure 10Universal Control of Ion Qubits in a Scalable Microfabricated Planar Trap
C. D. Herold, S. D. Fallek, J. T. Merrill, A. M. Meier, K. R. Brown, C. E. Volin, and J. M. Amini, New J. Phys. 18, 023048 (2016). http://stacks.iop.org/1367-2630/18/i=2/a=023048


qcs figure 11Transport Implementation of the Bernstein–Vazirani Algorithm with Ion Qubits
 S. D. Fallek, C. D. Herold, B. J. McMahon, K. M. Maller, K. R. Brown, and J. M. Amini, New J. Phys. 18, 083030 (2016). https://doi.org/10.1088%2F1367-2630%2F18%2F8%2F083030


qcs figure 12Ball-Grid Array Architecture for Microfabricated Ion Traps
N. D. Guise, S. D. Fallek, K. E. Stevens, K. R. Brown, C. Volin, A. W. Harter, J. M. Amini, R. E. Higashi, S. T. Lu, H. M. Chanhvongsak, T. A. Nguyen, M. S. Marcus, T. R. Ohnstein, and D. W. Youngner, Journal of Applied Physics 117, 174901 (2015). https://aip.scitation.org/doi/abs/10.1063/1.4917385

qcs figure 13Modulating Carrier and Sideband Coupling Strengths in a Standing-Wave Gate Beam
T. E. deLaubenfels, K. A. Burkhardt, G. Vittorini, J. T. Merrill, K. R. Brown, and J. M. Amini, JPhys. Rev. A 92, 061402 (2015). https://link.aps.org/doi/10.1103/PhysRevA.92.061402



qcs figure 14In-Vacuum Active Electronics for Microfabricated Ion Traps
N. D. Guise, S. D. Fallek, H. Hayden, C.-S. Pai, C. Volin, K. R. Brown, J. T. Merrill, A. W. Harter, J. M. Amini, L. M. Lust, K. Muldoon, D. Carlson, and J. Budach, Review of Scientific Instruments 85, 063101 (2014).https://aip.scitation.org/doi/abs/10.1063/1.4879136



qcs figure 15Reliable Transport through a Microfabricated X -Junction Surface-Electrode Ion Trap
K. Wright, J. M. Amini, D. L. Faircloth, C. Volin, S. C. Doret, H. Hayden, C-S Pai, D. W. Landgren, D. Denison, T. Killian, R. E. Slusher, and A. W. Harter, New J. Phys. 15, 033004 (2013). http://stacks.iop.org/1367-2630/15/i=3/a=033004

qcs figure 16Spatially Uniform Single-Qubit Gate Operations with near-Field Microwaves and Composite Pulse Compensation
C. M. Shappert, J. T. Merrill, K. R. Brown, J. M. Amini, C. Volin, S. C. Doret, H. Hayden, C.-S. Pai, K. R. Brown, and A. W. Harter, New J. Phys. 15, 083053 (2013). http://stacks.iop.org/1367-2630/15/i=8/a=083053

qcs figure 17Controlling Trapping Potentials and Stray Electric Fields in a Microfabricated Ion Trap through Design and Compensation
S. C. Doret, J. M. Amini, K. Wright, C. Volin, T. Killian, A. Ozakin, Douglas Denison, H. Hayden, C.-S. Pai, R. E. Slusher, and A. W. Harter, New J. Phys. 14, 073012 (2012). http://stacks.iop.org/1367-2630/14/i=7/a=073012

qcs figure 18Demonstration of Integrated Microscale Optics in Surface-Electrode Ion Traps
J. T. Merrill, C. Volin, D. Landgren, J. M. Amini, K. Wright, S. C. Doret, C-S Pai, H. Hayden, T. Killian, D. Faircloth, K. R. Brown, A. W. Harter, and R. E. Slusher, New J. Phys. 13, 103005 (2011). http://stacks.iop.org/1367-2630/13/i=10/a=103005