title: A Study on Fast Gates for Large-Scale Quantum Simulation with Trapped Ions.
abstract: Large-scale digital quantum simulations require thousands of fundamental entangling gates to construct the simulated dynamics. Despite success in a variety of small-scale simulations, quantum information processing platforms have hitherto failed to demonstrate the combination of precise control and scalability required to systematically outmatch classical simulators. We analyse how fast gates could enable trapped-ion quantum processors to achieve the requisite scalability to outperform classical computers without error correction. We analyze the performance of a large-scale digital simulator, and find that fidelity of around 70% is realizable for π-pulse infidelities below 10-5in traps subject to realistic rates of heating and dephasing. This scalability relies on fast gates: entangling gates faster than the trap period.
authors.affiliation: Department of Quantum Science, Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200, Australia.
authors.forename: Richard L
authors.initials: RL
authors.lastname: Taylor
authors.affiliation: Department of Quantum Science, Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200, Australia.
authors.forename: Christopher D B
authors.initials: CD
authors.lastname: Bentley
authors.affiliation: Department of Physical Chemistry, University of the Basque Country UPV/EHU, Apartado 644, Bilbao, 48080, Spain.
authors.forename: Julen S
authors.initials: JS
authors.lastname: Pedernales
authors.affiliation: Department of Physical Chemistry, University of the Basque Country UPV/EHU, Apartado 644, Bilbao, 48080, Spain.
authors.forename: Lucas
authors.initials: L
authors.lastname: Lamata
authors.affiliation: Department of Physical Chemistry, University of the Basque Country UPV/EHU, Apartado 644, Bilbao, 48080, Spain.|IKERBASQUE, Basque Foundation for Science, Maria Diaz de Haro 3, 48013, Bilbao, Spain.
authors.forename: Enrique
authors.initials: E
authors.lastname: Solano
authors.affiliation: Department of Quantum Science, Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200, Australia.|ARC Centre for Quantum Computation and Communication Technology, Australian National University, Canberra, ACT 0200, Australia.
authors.forename: André R R
authors.initials: AR
authors.lastname: Carvalho
authors.affiliation: Department of Quantum Science, Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200, Australia.
authors.forename: Joseph J
authors.initials: JJ
authors.lastname: Hope