A Study on Fast Gates for Large-Scale Quantum Simulation with Trapped Ions

Richard L. Taylor; Christopher D.B. Bentley; Julen S. Pedernales; Lucas Lamata; Enrique Solano; André R.R. Carvalho; Joseph J. Hope

doi:10.1038/srep46197

A Study on Fast Gates for Large-Scale Quantum Simulation with Trapped Ions

Richard L. Taylor^*, Christopher D.B. Bentley, Julen S. Pedernales, Lucas Lamata, Enrique Solano, André R.R. Carvalho, Joseph J. Hope

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

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^-5 in traps subject to realistic rates of heating and dephasing. This scalability relies on fast gates: entangling gates faster than the trap period.

Original language	English
Article number	46197
Journal	Scientific Reports
Volume	7
DOIs	https://doi.org/10.1038/srep46197
Publication status	Published - 12 Apr 2017

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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 10-5 in traps subject to realistic rates of heating and dephasing. This scalability relies on fast gates: entangling gates faster than the trap period.",

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AU - Bentley, Christopher D.B.

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AU - Lamata, Lucas

AU - Solano, Enrique

AU - Carvalho, André R.R.

AU - Hope, Joseph J.

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AB - 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 10-5 in traps subject to realistic rates of heating and dephasing. This scalability relies on fast gates: entangling gates faster than the trap period.

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A Study on Fast Gates for Large-Scale Quantum Simulation with Trapped Ions

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