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Individuality, Distinguishability, and (Non-)Entanglement

Bonn, 15 – 17 March 2018

Poster_thumbThis International Workshop is organized as an event of the DFG project Individuality, Distinguishability, and Entanglement.

Tomasz Bigaj
Jeremy Butterfield
Adam Caulton
Cord Friebe
James Ladyman
Andrea Lubberdink
F. A. Muller
Simon Saunders
Lev Vaidman
Tina Wachter

Kian Salimkhani (University of Bonn)
Tina Wachter (University of Hannover)


Here you can find the flyer with the program and some practical information, and the abstracts.



Regarding the ontology of quantum objects, there are two main views: either such objects violate Leibniz's Principle of the Identity of Indiscernibles (PII), or the PII can be saved but only in an extremely weak sense. However, based on a careful distinction between pure permutation invariance and physical entanglement matters may be interpreted very differently; particularly, one might be able to save the PII in a strong sense. In light of this new twist, we will reconsider the historical background of the debate on the PII, its logical aspects (e.g. the `labeling problem'), and the pertinent metaphysical commitments.


Thursday, March 15

9:30 – 10:30

10:30 – 10:45
Kian Salimkhani, Bonn

10:45 – 12:00
James Ladyman, Bristol
Are Quantum Particles Individuals, Objects and/or Structures?


14:00 – 15:15
Tina Wachter, Hannover
Back to the Roots: Leibniz's Principle in Quantum Mechanics

Coffee Break

15:30 – 16:45
Adam Caulton, Oxford
How to Russell a Fermi-Dirac

Coffee Break

17:00 – 18:15
F. A. Muller, Rotterdam
The Rise of Relationals


Friday, March 16

9:15 – 10:30
Tomasz Bigaj, Warsaw
On the Physical and Metaphysical Roots of the Symmetrization Postulate

Coffee Break

10:45 – 12:00
Andrea Lubberdink, Utrecht
Particles and the World


14:00 – 15:15
Simon Saunders, Oxford
Three questions about permutation symmetry

Coffee Break

15:30 – 16:45
Extended Discussion


Saturday, March 17

9:15 – 10:30
Lev Vaidman, Tel Aviv
Individuality, Distinguishability, and Non-Entanglement of a Person in the Many-Worlds Interpretation

Coffee Break

10:45 – 12:00
Jeremy Butterfield, Cambridge
States, Quantities and Permutation Symmetries (joint work with Adam Caulton)



Practical Information

Participation is free, but limited. To register, please send an email to ksalimkhani[at] or tina.wachter[at] with your name and affiliation.

Internationales Zentrum für Philosophie, Poppelsdorfer Allee 28, 53115 Bonn

From Cologne/Bonn Airport to Bonn Central Station:
Take the bus (SB 60) from the airport terminal to Bonn Central Station (“Bonn Hauptbahnhof”). It takes approximately 30 minutes.

From Düsseldorf Airport to Bonn Central Station:
Either you take the train RE 5 to Koblenz via Bonn Central Station or you get to Düsseldorf Central Station (“Düsseldorf Hauptbahnhof”) first and then take the IC to Offenburg via Bonn Central Station. Both takes about an hour.

From Frankfurt Airport to Bonn Central Station:
Take the IC directing to Cologne Central Station (“Köln Hauptbahnhof”) via Bonn Central Station (less than two hours ride). It is also possible to take the ICE directing to Cologne Central Station which you exit at “Siegburg/Bonn”. From there you get on the tram 66 (STR 66) from Siegburg Station (“Siegburg Bahnhof”) to Bonn Central Station (approximately one hour in total).

Here is a non-exhaustive list of nearby hotels:

Max Hostel
Maxstr. 75, 3111 Bonn

ibis Bonn
Vorgebirgsstrasse 33, 53119 Bonn

Mozartstr.1, 53115 Bonn

Hotel garni Löhndorf
Stockenstraße 6, 53113 Bonn

Hausdorffstr. 105-113, 53129 Bonn

Günnewig Hotel Residence by Centro
Kaiserplatz 11, 53113 Bonn

Hilton Bonn
Berliner Freiheit 2, 53111 Bonn

Markt 8, 53111 Bonn