Quantum computing of the pairing Hamiltonian at finite temperatures
arXiv:2212.08862 · doi:10.1103/PhysRevC.107.044308
Abstract
In this work, we study the pairing Hamiltonian with four particles at finite temperatures on a quantum simulator and a superconducting quantum computer. The excited states are obtained by the variational quantum deflation (VQD). The error-mitigation methods are applied to improve the noisy results. The simulation of thermal excitation states is performed using the same variational circuit as at zero temperature. The results from quantum computing become close to exact solutions at high temperatures, and demonstrate a smooth superfluid-normal phase transition as a function of temperatures as expected in finite systems.
10 pages, 6 figures
References in corpus (11)
- Simulated Quantum Computation of Molecular Energies
- Fission Barriers of Compound Superheavy Nuclei
- Quantum computing of the Li nucleus via ordered unitary coupled clusters
- Simulation of Collective Neutrino Oscillations on a Quantum Computer
- Variational approaches to constructing the many-body nuclear ground state for quantum computing
- Preparation of excited states for nuclear dynamics on a quantum computer
- Lipkin model on a quantum computer
- Accessing ground state and excited states energies in many-body system after symmetry restoration using quantum computers
- Pairing interactions and the vanishing pairing correlations in hot nuclei
- Simulating excited states of the Lipkin model on a quantum computer
- Nuclear deformation at finite temperature