Joint CMSP-HECAP Seminar by M. Dalmonte and J. Ingoldby, 25 March, 11:00 & 14:00

[CMSP Seminars Secretariat]

Dear All,

You are cordially invited to the Joint CMSP-HECAP Seminar by M. Dalmonte 
and J. Ingoldby on *Tuesday 25 March*, *at 11:00 and 14:00**hrs, Luigi 
Stasi Seminar Room (ICTP Leonardo Building, first floor).
*

*11:00hrs: part 1 by Marcello Dalmonte (ICTP)*

*Title:* Quantum simulating lattice gauge theories: ‘particle physics’ 
with Rydberg atom arrays

*Abstract: *Gauge theories are the back-bone of our understanding of 
nature at the most fundamental level as captured by the standard model. 
Despite their elegance and conceptual simplicity, gauge theories have 
historically represented a major computational challenge in many-body 
theory - including, for instance, the real-time dynamics describing 
heavy-ion collisions at colliders, which is inaccessible to classical 
simulations based on Monte Carlo sampling. These challenges have 
motivated a flurry of theoretical activity over the last ten years, 
devoted at developing strategies for the quantum simulation of their 
discretized version - lattice gauge theories.
In this first part of the talk, I will review the status of the field, 
highlighting potential applications as well as roadblocks, and 
discussing the first realization of gauge theory dynamics in a trapped 
ion quantum computer.
In the second part of the talk, I will show how Rydberg atoms trapped in 
optical tweezers offer unprecedented opportunities for the realization 
of lattice gauge theories in AMO systems. In particular, I will describe 
how recent experiments have already realized the real-time dynamics of 
the lattice Schwinger model (the one-dimensional version of quantum 
electrodynamics) in the presence of a topological angle, at system sizes 
at the boundaries of what is achievable with the best known classical 
algorithms.
Finally, I will do a 180 degree turn, and show how 
experimentally-realistic Abelian and non-Abelian lattice gauge theories 
provide unheralded insights on the breakdown of thermalization in 
strongly interacting quantum systems.

*Indico webpage: *https://indico.ictp.it/event/10980/ *Zoom registration 
link: *https://zoom.us/meeting/register/OaSD07rzSR2NEg0d2l0wdg*
* <https://zoom.us/meeting/register/OaSD07rzSR2NEg0d2l0wdg>

- - -

*14:00hrs: part 2 by James Ingoldby (Durham University)*

*Title:* Hamiltonian Truncation in the NISQ Era

*Abstract: *Quantum computers can simulate highly entangled quantum 
systems efficiently, enabling the exploration of dynamical processes in 
Quantum Field Theories (QFTs), which would otherwise be impossible using 
classical techniques. In this talk, I describe an alternative approach 
to traditional methods for simulating the real-time evolution in QFTs, 
employing Hamiltonian truncation (HT). Our approach is validated by 
simulating the evolution of the vacuum state of the Schwinger Model 
following a quench, and by preparing scattering states in scalar phi4 
theory. I present results obtained using both superconducting transmon 
and trapped ion hardware, and comment on promising future applications.

*Indico webpage: *https://indico.ictp.it/event/10971/ *Zoom registration 
link: *https://zoom.us/meeting/register/GozXJboMTrupDsEWAe73zQ (Meeting 
ID: 963 9068 4701; Passcode: 791967*)
*


You are all most welcome to attend!