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Updated: Sep 26, 2025
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Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
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Quantum simulation of operator spreading in the chaotic Ising model.
Michael R Geller1, Andrew Arrasmith2, Zoë Holmes3
1Center for Simulational Physics, University of Georgia, Athens, Georgia 30602, USA.
Physical Review. E
|April 16, 2022
Summary
Researchers used quantum computers to study operator spreading in a four-spin Ising model. They observed distinct patterns in chaotic versus integrable systems, advancing quantum simulation capabilities.
Area of Science:
- Quantum mechanics
- Quantum information science
- Quantum computing
Background:
- Simulating quantum systems is crucial for understanding quantum mechanics and quantum information.
- Operator spreading, measured by out-of-time-ordered correlators (OTOCs), is a key phenomenon in quantum dynamics.
Purpose of the Study:
- To investigate high-resolution operator spreading in a four-spin Ising model using near-term quantum computers.
- To explore the effects of space, time, and integrability on quantum scrambling.
- To demonstrate the feasibility of studying quantum information dynamics on cloud-based quantum processors.
Main Methods:
- Utilized an IBM Q processor for quantum computation.
- Employed quantum error mitigation techniques to enhance circuit fidelity.
- Implemented weaved Trotter simulation for studying operator spreading.
- Developed a fixed-node variant of the OTOC to estimate scrambling efficiently.
Main Results:
- Observed clear signatures of ballistic operator spreading in the chaotic regime of the Ising model.
- Detected operator localization in the integrable regime.
- Achieved high circuit fidelity for a four-spin system, enabling detailed analysis.
Conclusions:
- The study successfully demonstrates the use of cloud-based quantum computers for visualizing quantum scrambling.
- The developed techniques pave the way for broader applications in studying quantum information dynamics.
- This work highlights the potential of near-term quantum devices for foundational quantum mechanics research.
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