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Noisy quantum machines can analyze strongly-interacting quantum field theories (QFTs), revealing phenomena like quark confinement. This demonstrates digital quantum simulation

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Area of Science:

  • Quantum Information Science
  • High Energy Physics
  • Condensed Matter Physics

Background:

  • Strongly-interacting quantum field theories (QFTs) present significant computational challenges.
  • Non-perturbative phenomena in QFTs, such as quark confinement, are difficult to study with classical methods.
  • Noisy Intermediate-Scale Quantum (NISQ) devices are becoming increasingly available.

Purpose of the Study:

  • To investigate the potential of current NISQ quantum hardware for studying non-perturbative QFTs.
  • To determine if existing quantum simulators can analyze the energy spectrum of strongly-interacting 1+1D QFTs.
  • To explore quantum simulation as an alternative to traditional numerical techniques.

Main Methods:

  • Digital quantum simulation on NISQ devices.
  • Performing quench experiments.
  • Computing the energy spectrum of the 1+1D quantum Ising model with a longitudinal field using IBM's quantum simulators.

Main Results:

  • Demonstrated that existing noisy quantum machines can compute the energy spectrum of strongly-interacting 1+1D QFTs.
  • Successfully analyzed QFTs exhibiting non-perturbative effects like quark confinement and false vacuum decay.
  • Obtained results comparable to established numerical methods.

Conclusions:

  • Digital quantum simulation in the NISQ era is a viable alternative for analyzing QFTs.
  • NISQ devices can be utilized to study complex non-perturbative phenomena.
  • Quantum simulation offers a promising new avenue for theoretical physics research.