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QPPQ Seminar by George Vahala (William & Mary)

18/2/2022

 
New session of the Quantum for Plasmas & Plasmas for Quantum (QPPQ) seminar:

Qubit Lattice Algorithm for the Electromagnetic Pulse Propagation in Scalar Dielectric Media

George Vahala (William & Mary)

Friday 25 February 2021

at 16:00 Lisbon time

in Zoom: link distributed on the day of the session to e-mails registered here

Abstract:

There is much interest in examining plasma problems that will be amenable to error-correcting quantum computers. For some years, we have been developing Qubit Lattice Algorithms (QLA) for the solution of nonlinear physics – in particular the Nonlinear Schrodinger Equation (NLS)/Gross Pitaevskii equation in 1D-2D-3D. The 1D soliton physics benchmarked our algorithms, while in 3D we examined scalar quantum turbulence, finding 3 energy cascades on a 5760³ grid using 11k processors (2009). For spinor BEC simulations the QLA were ideally parallelized on classical supercomputers (tested to over 760k cores on IBM Mira). QLA is a mesoscopic representation of interleaved non-commuting sequence of collision/streaming operators which in the continuum limit perturbatively reproduce the physics equations of interest. The collision operators entangle the local on-site qubits, while the streaming operators spread this entanglement throughout the lattice. For plasma physics we are developing QLA for Maxwell equations in a dielectric medium. The QLA collision operators were readily determined following the connection of Maxwell equations in a vacuum to the free particle Dirac equation. Even for 1D propagation of an electromagnetic pulse normal to a dielectric interface we find interesting results: our QLA simulations reproduces all the standard Fresnel relations for a plane wave, except that the transmission amplitude is augmented by a factor (n₂ /n₁ )¹/² over the Fresnel plane wave result. We will discuss our recent QLA results of scattering of a 1D electromagnetic pulse from a 2D scalar dielectric cylinder. For sharp dielectric boundary layers, and small pulse widths one finds multiple reflections within the dielectric cylinder leading to re-radiation of fields from the dielectric region and quite complex field structures. 

​In collaboration with Min Soe (RSU), Linda Vahala (ODU), Abhay K. Ram (MIT)

Project QEntHEP – Quantum Entanglement in High Energy Physics

16/2/2022

 
The FCT Exploratory Project QEntHEP – Quantum Entanglement in High Energy Physics started on January 2022. The project is coordinated by Gonçalo Quinta, and involves also João Seixas and Yasser Omar.

This project further reinforces the Group's agenda and activities to explore the frontier between Quantum Information Science and High-Energy Physics, already ongoing in the QuantHEP 
– Quantum Computing Solutions for High-Energy Physics project and QuantHEP Seminar.

This Exploratory Project is funded by Fundação para a Ciência e a Tecnologia (FCT), the Portuguese Science Foundation.

QuantHEP Seminar by Patrick Hayden (Stanford University)

2/2/2022

 
Picture

New session of the QuantHEP Seminar – Quantum Computation and High-Energy Physics Seminar:
Picture
Title: Reflected entropy in holography and beyond

Speaker: Patrick Hayden (Stanford University)

Date: Wednesday 9 February 2022

Time (taking into account the change to Winter time in Europe): 17h00 Brussels = 16h00 Lisbon = 12h00 New York = etc.

​Venue: To receive the Zoom link, subscribe to the QuantHEP Seminar mailing list and/or the QuantHEP Seminar Google Calendar or iCal.
Or, in alternative, watch on the QuantHEP Seminar YouTube channel.

To receive announcements, subscribe to the QuantHEP Seminar mailing list.
​
And follow QuantHEP on Twitter!

For more details, see: https://quanthep-seminar.org/

Matteo Turco joins the Group

1/2/2022

 
Matteo Turco has joined the Group as a Ph.D. student. Welcome Matteo!

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