RIKEN Lunch Seminar

"Deeply inelastic scattering structure functions on a hybrid quantum computer"

Presented by Andrey Tarasov, BNL

Thursday, September 12, 2019, 12:00 pm — Building 510, Room 2-160

Computation of DIS structure functions from first principles is an outstanding problem in Quantum Chromodynamics (QCD) as it involves matrix elements of products of electromagnetic currents that are light-like separated in Minkowski spacetime. Since Monte Carlo computations in lattice QCD are only robust in Euclidean spacetime, it is worthwhile to ask whether simulations on a quantum computer can be beneficial. In my talk I will outline a strategy to compute deeply inelastic scattering structure functions on a hybrid quantum computer which is based on representation of the fermion determinant in the QCD effective action as a quantum mechanical "worldline" path integral over fermionic and bosonic degrees of freedom. The proper time evolution of these worldlines can be determined on a quantum computer. While extremely challenging in general, the problem simplifies in the Regge limit of QCD, where the interaction of the worldlines with gauge fields is strongly localized in proper time and the corresponding quantum circuits can be written down. As a first application, we employ the Color Glass Condensate effective theory to construct the quantum algorithm for a simple dipole model of the F2 structure function. We outline further how this computation scales up in complexity and extends in scope to other real-time correlation functions.

Hosted by: Yuta Kikuchi

15181  |  INT/EXT  |  Events Calendar


Not all computers/devices will add this event to your calendar automatically.

A calendar event file named "calendar.ics" will be placed in your downloads location. Depending on how your device/computer is configured, you may have to locate this file and double click on it to add the event to your calendar.

Event dates, times, and locations are subject to change. Event details will not be updated automatically once you add this event to your own calendar. Check the Lab's Events Calendar to ensure that you have the latest event information.