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Related Experiment Videos

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

Richard L Taylor1, Christopher D B Bentley1, Julen S Pedernales2

  • 1Department of Quantum Science, Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200, Australia.

Scientific Reports
|April 13, 2017
PubMed
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Fast entangling gates in trapped-ion quantum processors could enable large-scale quantum simulations to outperform classical computers. This advancement in quantum computing hinges on gates operating faster than the trap period, achieving high fidelity without error correction.

Area of Science:

  • Quantum Information Science
  • Quantum Computing
  • Atomic Physics

Background:

  • Large-scale digital quantum simulations necessitate numerous entangling gates for simulating quantum dynamics.
  • Current quantum information processing platforms struggle to achieve the precise control and scalability needed to surpass classical simulation capabilities.
  • Trapped-ion quantum processors are a promising platform for scalable quantum computation.

Purpose of the Study:

  • To analyze the potential of fast gates in trapped-ion quantum processors for achieving scalability in quantum simulations.
  • To determine if trapped-ion systems can outperform classical computers without the need for quantum error correction.
  • To investigate the fidelity achievable in large-scale digital quantum simulations under realistic experimental conditions.

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Main Methods:

  • Theoretical analysis of a large-scale digital quantum simulator implemented on a trapped-ion quantum processor.
  • Modeling of gate fidelity considering realistic factors such as π-pulse infidelities, trap heating, and dephasing rates.
  • Focus on entangling gate speeds relative to the trap period as a key performance metric.

Main Results:

  • A quantum simulation fidelity of approximately 70% is achievable with π-pulse infidelities below 10-5.
  • These results are attainable even with realistic heating and dephasing rates in trapped-ion systems.
  • The demonstrated scalability is critically dependent on implementing entangling gates that operate faster than the trap period.

Conclusions:

  • Fast entangling gates are crucial for realizing scalable trapped-ion quantum processors capable of outperforming classical computers.
  • High-fidelity quantum simulations are feasible without error correction by leveraging rapid gate operations.
  • This research highlights a viable pathway towards practical, large-scale quantum simulation using trapped-ion technology.