Speaker
Harunobu Fujimura
(大阪大学)
Description
We propose a quantum algorithm to efficiently estimate the entanglement asymmetry, a recently introduced measure of symmetry breaking at the subsystem level that plays a key role in the quantum Mpemba effect. Our protocol combines the SWAP test with ideas from quantum phase estimation and requires a number of measurements independent of the system size, making it suitable for large quantum many-body systems and quantum field theories. As an application, we study the lattice Schwinger model with a θ term and demonstrate that our approach enables the investigation of the quantum Mpemba effect in a quantum field theory setting. We further provide resource estimates for quantum computing implementations.