Quantum Software Consortium

5th QSC Junior Day

The Quantum Software Consortium (QSC) brings together scientists with backgrounds in computer science, mathematics, engineering and physics. To that end, the 5th QSC Junior Day will be held on Thursday, Nov 17 in Leiden (Huis van de Passer, Steenschuur 6, 2311 ET Leiden). We invite all junior researchers (Masters, PhD students, Post-Docs) to join us on this exciting day full of informal interaction, interesting talks and more.

The speakers are a.o. Martin van Exter (LION, Leiden), Tim Coopmans (LIACS, Leiden) and Liubov Markovich (LION, Leiden). Yvonne Smit (QuSoft, UvA) will give a presentation on Science Communication.

We like to welcome all of you. Please only register for lunch and snacks/pizza if you really will attend.


10:00 - 10:30 - Registration : Coffee/Tea 

10:30 - 11:15 - Tim Coopmans (LIACS, Leiden Univ):

Distributing entanglement over large distances using quantum repeaters

11:15 - 12:00 - Yvonne Smit (QuSoft, UvA):

Science Communication: How to make an impact with your own research

12:00 - 13:30 - Lunch

13:30 - 14:15 - Martin van Exter (LION, Leiden Univ): Fabry-Perot spectra have a fine structure

14:15 - 15:00 - Liubov Markovich (LION, Leiden Univ): Observable estimation with single qubit quantum memory

15:00 - 15:30 - Tea/Coffee Break

15:30 - 16:15 - Social Activity  

16:15 - 18:00 - Drinks and pizza 


Abstract Tim Coopmans: Distributing entanglement over large distances using quantum repeaters

Textbook quantum communication will often tell you that Alice and Bob should send qubits to each other, or should share EPR pairs. In reality, achieving this is hard: qubits get almost surely lost when sent over large distances, specifically when qubits are encoded into photons which are sent through glass fibre. This talk will be an introduction to quantum repeaters: intermediate nodes in between Alice and Bob, which allow us to in principle overcome this limitation. I will introduce the various generations of repeater schemes which are enabled by better-quality quantum devices (gate fidelity, photon indistinguishability, etc.). In the end I will briefly talk about how theorists can help to make long-distance entanglement a reality sooner.


Pedro Capitao (Cryptology, CWI)

Vicky Dominguez (QuTech, TU Delft)
Leon Raabe (LION, Leiden University)

When: Thursday November 17th, 2022
Time: 10:00 - 18:30
Where: Huis van de Passer, Steenschuur 6, 2311 ET Leiden