PIRSA:21020048

Video URL

https://pirsa.org/21020048

The quantum sine-Gordon model with quantum circuits

Roy, A. (2021). The quantum sine-Gordon model with quantum circuits. Perimeter Institute for Theoretical Physics. https://pirsa.org/21020048

Roy, Ananda. The quantum sine-Gordon model with quantum circuits. Perimeter Institute for Theoretical Physics, Feb. 23, 2021, https://pirsa.org/21020048 

          @misc{ scivideos_PIRSA:21020048,
            doi = {10.48660/21020048},
            url = {https://pirsa.org/21020048},
            author = {Roy, Ananda},
            keywords = {Quantum Fields and Strings},
            language = {en},
            title = {The quantum sine-Gordon model with quantum circuits},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2021},
            month = {feb},
            note = {PIRSA:21020048 see, \url{https://scivideos.org/index.php/pirsa/21020048}}
          }

Ananda Roy Technical University of Munich (TUM)

Talk numberPIRSA:21020048
DOI10.48660/21020048
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

Analog quantum simulation has the potential to be an indispensable technique in the investigation of complex quantum systems. In this work, we numerically investigate a one-dimensional, faithful, analog, quantum electronic circuit simulator built out of Josephson junctions for one of the paradigmatic models of an integrable quantum field theory: the quantum sine-Gordon (qSG) model in 1+1 space-time dimensions. We analyze the lattice model using the density matrix renormalization group technique and benchmark our numerical results with existing Bethe ansatz computations. Furthermore, we perform analytical form-factor calculations for the two-point correlation function of vertex operators, which closely agree with our numerical computations. Finally, we compute the entanglement spectrum of the qSG model. We compare our results with those obtained using the integrable lattice-regularization based on the quantum XYZ chain and show that the quantum circuit model is less susceptible to corrections to scaling compared to the XYZ chain. We provide numerical evidence that the parameters required to realize the qSG model are accessible with modern-day superconducting circuit technology, thus providing additional credence towards the viability of the latter platform for simulating strongly interacting quantum field theories.