Variational Quantum Simulation of Anyonic Chains



Summary

A variational quantum simulation scheme is presented for analyzing anyonic chains, specifically the restricted solid-on-solid (RSOS) models of Andrews, Baxter, and Forrester. The scheme is demonstrated for the A family of Dynkin diagrams with 4 ≤ p ≤ 8, using a variational quantum-classical algorithm based on the Euler-Cartan circuit ansatz.

Highlights

  • Variational quantum simulation scheme for anyonic chains
  • Focus on RSOS models associated with Dynkin diagrams
  • Demonstration for A family with 4 ≤ p ≤ 8
  • Use of variational quantum-classical algorithm
  • Euler-Cartan circuit ansatz for parameterized circuit
  • Measurement of observables captures anyonic nature
  • Topological symmetry operators analyzed at quantum-critical points

Key Insights

  • The proposed scheme provides a systematic approach to realizing a large family of quantum field theories that have largely eluded physical realizations.
  • The RSOS models can be mapped to qubit systems, allowing for the investigation of anyonic chains using digital quantum simulators.
  • The Euler-Cartan circuit ansatz is used to parametrize the unitary operator, enabling the realization of low-lying eigenstates of the RSOS models at their respective quantum critical points.
  • The measurement of n-qubit observables can capture the signatures of the anyonic nature of the Hilbert space and the corresponding topological symmetry operators.
  • The scheme can be generalized to other types of anyonic chains, enabling the investigation of a wide range of quantum field theories.
  • The use of a variational quantum-classical algorithm allows for the optimization of the circuit parameters to realize the desired anyonic state.
  • The proposed approach has the potential to enable the study of non-perturbative phenomena in low-dimensional quantum field theories using near-term quantum simulators.



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Citation

Roy, A. (2024). Variational Quantum Simulation of Anyonic Chains (Version 1). arXiv. https://doi.org/10.48550/ARXIV.2412.17781

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