Classical and Quantum Simulations of Nuclear Dynamics - Sofia Quaglioni

Explore nuclear dynamics through 'classical' and quantum simulations in this 43-minute conference talk by Sofia Quaglioni from LLNL. Delve into the challenges of evaluating S-factors at stellar energies, combining nuclear forces derived from chiral effective field theory with ab initio methods. Discover how quantum computers offer a natural framework for simulating time-dependent scattering theory, and learn about the potential of custom gates to improve performance in quantum simulations. Gain insights into the unified treatment of bound and unbound states in structure, scattering, and reactions, as well as the extraction of energy spectra from quantum simulation signals. Understand the current state and future possibilities of quantum computing in nuclear physics research, presented as part of the Opportunities and Challenges in Few-Body Physics conference at the Kavli Institute for Theoretical Physics.

Intro
We need reliable theory to accurately evaluate S-factors at stellar energies
We combine nuclear forces derived within chiral effective field theory and ab initio methods
Structure, scattering and reactions obtained with unified treatment of bound and unbound states
combine it with experimental data to arrive at an improved evaluation of S..(0)
The ab initio structure and reactions team
Quantum computers perform calculations by manipulating quantum states
A physical realization of a qubit is a transmon
One can also work with registers of d-level quantum systems or qudits
Physically, quantum gates are realized by irradiation with resonant microwave pulses (found by optimization)
Quantum computing offers a natural framework for simulating time-dependent scattering theory
A challenge is to realize useful quantum simulations in this early vacuum tube era' of quanturn computing
In the near term, this is a self-inflicted problem! Can build custom gates for the problem of interest
We can extract the energy spectrum from the signal because we are able to run the simulation a long time
Custom gates enable major performance improvements for state preparation, broader class of problems
The APS Topical Group On Few-Body Systems
With minimal number of custom gates, we demonstrated 99% fidelity, 10-fold increase in quantum simulation time