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27th DIRAC Working Group Meeting 2024, Odense, June 4th - June 7th (Arrival June 3rd)


FKF Meeting Room (FKF Møderum Ø10-412-2)

To get the SDU map link to the meeting room, type FKF in the search field at this link: SDU Møderum

For DIRAC developers and invited guests, who cannot be present in person: Registration for ZOOM

For new people

The DIRAC meeting is a family reunion for DIRAC developers and DIRAC friends. It is a nice opportunity to meet the people behind the DIRAC code. There is no registration fee but for organization purposes please add yourself to the participant list below (send an e-mail to Hans Jørgen using hjj at if you do not have editing permission to this page).

Most people will stay at the campground (more info below). The cabins are very good comfort, not expensive, and it's fun to be there. Book them well in advance.

We will discuss science but a significant part of the program is reserved to discuss the future of the DIRAC code, programming, code maintenance, release planning, as well as for programming task groups.

The meeting program is self-organised, simply add talks and discussion points to the program.

How to get to Odense

Typically you will i) fly to Copenhagen and then take the train or ii) fly to Billund and then take bus to Vejle plus train Vejle-Odense. From Odense train station you can take bus 35 (in the right direction!) or share cab to the DCU-Camping Odense. If you arrive to Odense by train on a regular train ticket (expensive: 369 DKK), then the bus from the railway station to the camp ground (or any other destination in Odense) is included in the train ticket. If you buy your ticket CPH → Odense St. in advance (e.g. a month) on, then you can buy a “DSB Orange ticket” (non-refundable) or a “DSB Orange Fri ticket” (refundable until 30 min before departure) for from 94 DKK or 157 DKK. They are only valid for a specific train, in contrast to the regular tickets which are valid for any train that day. Local buses are not included in the orange tickets. The closer you come to the travel day, the more expensive the orange tickets become.


Make your cabin reservation at DCU-Camping Odense. The cabins can accommodate 3-4 people so organize with others. Use the dirac-developers mailing list.

A downtown hotel at the railway station: CABINN Odense Hotel. You can find other hotels from around 500 DKK per night by searching google for “hotels Odense” and some BBs to less than 500 DKK. Note that hotels might be cheaper via their own web site than on etc.

Local transport in Odense

Revised April 2024 by Hans Jørgen.

  • Note that the local bus lines have changed since the tram line was opened, so do not look for the bus numbers you used previously!
  • Both the cheapest and the simplest is to use the new “Odense NU” mobile tickets: 15 kr for 26+, 10 kr if you are 25 or younger. They are valid for one hour for both buses and the tram, as long as you stay inside Odense Kommune. You can read the QR code at the tram stops to buy the ticket, or you can download and use the app “Rejsebillet”. Or on
  • In the “Rejsebillet” app (after having added a credit card and switched to English), choose “Special Tickets” and scroll for “Odense NOW”. If you filter “Sold by Fynbus”, it is easier to find it, because there are many special tickets!!!
  • Use to find your best connection, for example to the campground. The railway station is “Odense St.” and the campground is “DCU-Odense City Camp”.
  • Even easier: Download the “Rejseplanen” app and use that. I use it every time I travel in DK!
  • Railway station - university: use Odense Letbane (tram, light rail). There is no direct bus connection Railway Station - university any more. Use QR code shown at tram stops or buy with the app “Rejsebillet”.
  • A map of all bus lines in Odense can be found here

Participants (please add yourself)

Please note arrival and departure if you will not participate the whole time.

  1. Hans Jørgen Aa. Jensen, Odense
  2. Trond Saue, Toulouse
  3. Gabriele Fabbro, Toulouse
  4. Dávid Ferenc, Toulouse
  5. Martin van Horn, Stockholm
  6. Luuk Visscher, Amsterdam
  7. Agustín Aucar, Groningen
  8. Jan Brandejs, Toulouse
  9. Andre Gomes, Lille (on zoom)
  10. Ansgar Pausch, Amsterdam
  11. Gosia Olejniczak, Warsaw (arriving late on Monday)
  12. Erik D. Hedegård, Odense
  13. Ernst D. Larsson, Odense

Work tasks (please add tasks)

  • Go through issues list
  • All executables link to all object files. Is this really needed ?

Possible items for the meeting, to be scheduled later

Prologue: Monday June 3

Tuesday June 4

The state of affairs

  • 09:00 – 09:15 Opening, discussion of meeting program (Hans Jørgen)
  • 09:15 – 09:30 Introduction round (everybody)
  • 09:30 – 11:30 Overview of current and planned DIRAC developments by node leaders
  • 11:30 – 12:00 Task group formation


  • 12:00 – 13:30

Discussions - Focus on ExaCorr

  • 13:30 – 14:30 State of affairs wrt dependencies and efficiency.
  • 14:30 – 15.15
  • 15:15 – 15:45

Online Session

  • 15.45 – 17.30

Wednesday June 5

Science with DIRAC

  • 09:00 – 09:30 MCSCF without Symmetry: the Sequel – Martin van Horn
  • 09:30 – 10:00 Relativistic Quantum Chemistry in Finite Magnetic Fields – Ansgar Pausch
  • 10:00 – 11:00 coffee break and group picture
  • 11:00 – 11:30 Self-energy in a Finite Basis – Dávid Ferenc
  • 11:30 – 12:00 Molecular Properties through Coupled Cluster Theory – Gabriele Fabbro


  • 12:10 – 13:30

Embedding models

  • 13:30 – 15:30 Presentation of the various models, discussion about interfaces etc

DIRAC release

  • 16:00 – 17:30

Thursday June 6

Science with DIRAC

  • 09:00 – 09:30 Intrinsic Fragment Orbitals and DIRAC - Luuk Visscher
  • 09:30 – 10:00 PV effects in Molecular Properties – Agustín Aucar
  • 10:30 – 11:00 Core spectra with embedding approaches – Andre Gomes
  • 11:00 – 11:30 tenpi – Jan Brandejs
  • 11:00 – 12:30 Collaborative work and coffee

Technical issues (discussion sessions)

  • 13:30 – 14:00 Gitlab as host
  • 14:00 – 14:30
  • 14:30 – 15:00

Collaborative work

  • 15:00 – 17:30

Meeting dinner

Friday June 7 (bonus)

  • 09:00 – 17:30 Collaborative session (joint papers, joint programming efforts).
meeting2024.txt · Last modified: 2024/06/06 09:33 by aspg

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