Using a few-qubit quantum computer to simulate quantum field theory in (3+1)D

3+1 Dimension Schwinger Pair Production with Quantum Computers

We develop a novel algorithm and experimentally study the rate of electron-positron pair production in a strong electric field, in (3+1)d. the resource reduction is achieved by treating the electric field as a backgroundfield, working in fourier space transverse to the electric field direction, and considering parity symmetry, such that we successfully map the three spatial dimension problems into one spatial dimension problems.We observe that the rate of pair production of electrons and positrons is consistent with the theoretical predication of the schwinger effect.