Speaker
Shimpei Goto
(The University of Tokyo)
Description
We present a matrix-product-state-based approach for simulating a qubits-waveguide system in real space. In this representation, the photon mode is described as a Bogoliubov mode, and the vacuum of the waveguide also becomes the Bogoliubov vacuum. This entangled Bogoliubov vacuum makes a simulation difficult because it requires large bosonic degrees of freedom for a faithful representation of the vacuum. The presented approach overcomes this difficulty by using single-site update schemes based on the controlled-bond expansion. We simulate a system consisting of four qubits and 400 bosonic waveguide modes and reproduce the qubit decay rate expected from superradiance phenomena.
Primary author
Shimpei Goto
(The University of Tokyo)
