EVENTS

• Seminar : Mr. Saurabh Kadam, University of Maryland, College Park, Maryland, USA

 Date and time: 17th March (Friday), 2023 at 10 am ; Venue: Physics Department conference room

Title: Loop-string-hadron formulation of an SU(3) lattice gauge theory with dynamical quarks

Abstract: Quantum simulation of lattice quantum chromodynamics (QCD), a non-Abelian gauge theory that describes the strong force in the continuum limit, can be advantageous in certain situations than the classical method of solving QCD using Monte-Carlo sampling. Such a quantum simulation requires a Hamiltonian formulation of QCD where the states in the Hilbert space of the theory are mapped onto the degrees of freedom of the quantum device. Thus, a resource-efficient formulation of QCD is needed for reducing its quantum-computational cost. There is increasing evidence that the loop-string-hadron (LSH) formulation developed for an SU(2) lattice gauge theory, can yield such cost reductions when compared to some of the other formulations of the same theory. Motivated by this, I will present the recent generalization of LSH formulation to an SU(3) lattice gauge theory in 1+1 dimensions, which is a step towards achieving a resource-efficient Hamiltonian formulation of lattice QCD.  (Collaborators: Jesse Stryker & Indrakshi Raychowdhury)

• Seminar: Prof. P. S. Anil Kumar, Department of Physics, IISc, Bangalore

Date : 22.07.2022;  Time : 11am-12noon;  Venue : Physics Conference Room

Title: "Introduction to Quantum Materials and Devices"

• Seminar: Dr. Aniruddha Bapat, Lawrence Berkeley National Laboratory, USA

     Date and time: 19 April 2022 (Tuesday) - 3:00-4:00 pm.;    Venue: Physics Department conference room

     Title: Quantum simulation using variational techniques

     Abstract: The advent of quantum computing has created novel opportunities for the direct simulation of quantum systems on quantum hardware. However, in the near term, quantum devices will possess limited scope due to noise and size limitations. Due in part to these constraints, variational algorithms have gained popularity as a powerful yet   economical alternative to traditional digital quantum computation. 

In this talk, I will discuss two variational frameworks, parameterized quantum circuits and tensor networks. For each method I will give an overview followed by some results in specific applications, such as preparing critical Ising model ground states and simulating SU(2) lattice gauge theory in one spatial dimension.