Qhub@CAS Workshop

solvese on 26. May 2023

In May, 2023, both Andre Laestadius and Sølve Selstø from the Hub had the pleasure of being invited to the CAS workshop Molecular quantum dynamics, organized by Simen Kvaal and Thomas Bondo Pedersen at the Hylleraas Centre for Quantum Molecular Science. The workshop is affiliated with the CAS project Attosecond Quantum Dynamics Beyond the Born-Oppenheimer Approximation.

Andre presentation was entitled Homotopies and Coupled-Cluster Theory; the coupled-cluster method is a widely used approach in quantum chemistry which, in recent years, also have found several applications to quantum dynamics as well. Sølve presented ideas on using complex absorbing potential to obtain photoelectron spectra and simulate detectors.

Seminar: Kishore Thapliyal

solvese on 16. May 2023

Friday 26th of May Kishore Thapliyal, from Palacky University, Olomouc, Czecch Republic, will visit the Quantum Hub and tell us about his work on secure quantum computation.

Title and abstract:

Experimental generation of engineered multi-mode quantum states to use in secure quantum computation 

The idea of secure multiparty computation will be briefly reviewed. With the help of an example relevance of a quantum solution for such secure computation tasks in socioeconomic problems will be mentioned. Such relevant socioeconomic problems could be auction, voting, private comparison, etc. Quantum solutions for one such problem, anonymous veto, will be proposed with focus on the requirements of the desirable protocol. The solution uses multiparty densecoding which requires entanglement to be shared among the voters. A multiparty densecoding based protocol for quantum conference will also be discussed. Generation, transmission, and maintenance of such entangled states is a challenging task. In this context, some non-Gaussian operations are known useful for entanglement distillation. Here, we discuss photon subtraction on both signal and idler beams of a multi-mode twin beam generated experimentally. Joint photon-number distributions of photon-subtracted twin beams are monitored by an iCCD camera. The effect of photon subtraction on average photon numbers, nonclassical and non-Gaussian properties and entanglement of the generated states is studied considering the states obtained by subtracting up to four signal and idler photocounts.  

References 

[1] S. Mishra, K. Thapliyal, A. Parakh, and A. Pathak, Quantum anonymous veto: A set of new protocols, EPJ Quantum Technology 9, 14 (2022).  

[2] K. Thapliyal, J. Peřina Jr., V. Michalek, R. Machulka, and O. Haderka, Experimental characterization of photon-subtracted twin beams, Communicated (2023). 

Seminar: No need for a grid

solvese on 27. April 2023

It was our pleasure to invite you all to an interesting seminar by Simen Kvaal from University of Oslo. Simen is a quantum physicist with the Hylleraas centre at the Department of Chemistry, UiO. The title of his talk is “No need for a grid: Gaussians for the time-dependent Schrödinger equation”.

Read more about it here: https://arxiv.org/abs/2207.00271

Seminar: Quantum dynamics

solvese on 5. January 2023

We are pleased to invite you to listen to and talk with Stefanos Carlström from Lund University, who is going to present his work on Mathematical methods for high-dimensional physics; atoms and molecules in strong laser fields.

This invite goes out to the Dept. of Computer Science – and a few other colleges for whom this seminar could be of interest. Perhaps I have missed some;  do not hesitate to forward this invitation to anyone who might be interested.

QCNorway: The need for a Norwegian quantum strategy

solvese on 8. November 2022

November 7th and 8th, 2022, jointly with Simula, Sigma 2 and Sintef, OsloMet organized a workshop in order to highlight and emphasize the need to establish a Norwegian strategy when it comes to quantum computing.

Website: https://www.qcnorway.no/

The workshop featured contributions from several notable experts in the field of quantum computing and more than 80 in-person participants.

All presentations may be found on the website.

Here is the OsloMet Quantum Hub’s own contribution: The OsloMet Quantum Hub: Bringing the Quantum to the People.

Note also this interesting presentation from Shaukat Ali: Time for another Simula

and Umair Imam’s presentation on how Ruter has sucessfully implemented quantum machine learning: How Ruter uses Quantum computing in its machine learning algorithms.

Aleksandar Davidov, Sergiy Denysov and Sebastian T. Overskott at our Quantum Hub are all affiliated with this project.

QHub@Sopra Steria

solvese on 13. September 2022

Andreas Ahlgren at Sopra Steria is a genuine quantum enthusiast. In September 2022 his enthusiasm was merged with that of Lars Nordbryhn at IBM and Sølve Selstø from our Quantum Hub at Sopra Steria’s “Quantumkväll”. Together they presented their perspectives on quantum computing – what it is and how it could be used. It was a pleasure to see that several of Andreas’ colleges decided to join. The enthusiasm seems to be contagious.