ELFT HÍRADÓ

[Andras Palyi <palyi AT mail.bme.hu>]

Dear Colleagues, 
 
Next Monday the BME Exotic Quantum Phases seminar continues with this talk:
 
Speaker: Ananda Roy (TU Munich)
Title: "The quantum sine-Gordon model with quantum circuits"
Abstract: see below
Reference: The quantum sine-Gordon model with quantum circuits, Ananda Roy, 
Dirk Schuricht, Johannes Hauschild, Frank Pollmann, Hubert Saleur, 
https://arxiv.org/abs/2007.06874 <https://arxiv.org/abs/2007.06874>
Time: Nov 2, Monday, 14:15
Location: online in Teams
 
About the speaker: Ananda is a theoretical physicist with a broad expertise, 
including superconducting circuits, topological quantum computing, and 
quantum field theory. After studying physics in Kanpur and applied physics at 
Yale, Ananda obtained his PhD from Yale, supervised by Michel Devoret and A. 
Douglas Stone. He held postdoc positions at RWTH Aachen with Barbara Terhal 
and David DiVincenzo, and at CEA Saclay with Hubert Saleur, before joining 
the group of Frank Pollmann at TU Munich. 
 
Link to join the Teams meeting:
https://teams.microsoft.com/l/meetup-join/19%3a49d5e5cbc9cf440294f93841ae4c9006%40thread.tacv2/1603988601939?context=%7b%22Tid%22%3a%226a3548ab-7570-4271-91a8-58da00697029%22%2c%22Oid%22%3a%22f8b27e90-dbca-4bb5-813c-d6415577ec35%22%7d
 
<https://teams.microsoft.com/l/meetup-join/19%3a49d5e5cbc9cf440294f93841ae4c9006%40thread.tacv2/1603988601939?context=%7b%22Tid%22%3a%226a3548ab-7570-4271-91a8-58da00697029%22%2c%22Oid%22%3a%22f8b27e90-dbca-4bb5-813c-d6415577ec35%22%7d>
Best regards,
Andras Palyi
 
= = = 
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."