316 citations · 457 across the 18 of their papers we have counts for
20 papers
The Okinawa Lectures on Entropy
Klaas Landsman
After a historical introduction, the most important classical and quantum entropies are introduced as constructions in classical and quantum probability theory. Classical entropies…
Typical = random
Klaas Landsman
This expository paper advocates an approach to physics in which ``typicality" is identified with a suitable form of algorithmic randomness. To this end various theorems from mathem…
Reopening the Hole Argument
Klaas Landsman
This expository paper relates the Hole Argument in general relativity (GR) to the well-known theorem of Choquet-Bruhat and Geroch (1969) on the existence and uniqueness of globally…
Penrose's 1965 singularity theorem: From geodesic incompleteness to cosmic censorship
Klaas Landsman
Supplementing earlier literature by e.g. Tipler, Clarke, & Ellis (1980), Israel (1987), Thorne, (1994), Earman (1999), Senovilla & Garfinkle (2015), Curiel (2019ab), and Landsman (…
Bohmian mechanics is not deterministic
Klaas Landsman
I argue that Bohmian mechanics (or any similar pilot-wave theory) cannot reasonably be claimed to be a deterministic theory. If one assumes the "quantum equilibrium distribution" p…
Singularities, black holes, and cosmic censorship: A tribute to Roger Penrose
Klaas Landsman
In the light of his recent (and fully deserved) Nobel Prize, this pedagogical paper draws attention to a fundamental tension that drove Penrose's work on general relativity. His 19…
Indeterminism and Undecidability
Klaas Landsman
The aim of this paper is to argue that the (alleged) indeterminism of quantum mechanics, claimed by adherents of the Copenhagen interpretation since Born (1926), can be proved from…
(No) Wigner Theorem for C*-algebras
Klaas Landsman, Kitty Rang
Wigner's Theorem states that bijections of the set P_1(H) of one-dimensional projections on a Hilbert space H that preserve transition probabilities are induced by either a unitary…
Quantum theory and functional analysis
Klaas Landsman
Quantum theory and functional analysis were created and put into essentially their final form during similar periods ending around 1930. Each was also a key outcome of the major re…
Strict deformation quantization of the state space of with applications to the Curie-Weiss model
Klaas Landsman, Valter Moretti, Christiaan J. F. van de Ven
Increasing tensor powers of the matrices are known to give rise to a continuous bundle of -algebras over …
Randomness? What randomness?
Klaas Landsman
This is a review of the issue of randomness in quantum mechanics, with special emphasis on its ambiguity; for example, randomness has different antipodal relationships to determini…
Symmetries in exact Bohrification
Klaas Landsman, Bert Lindenhovius
The `Bohrification" program in the foundations of quantum mechanics implements Bohr's doctrine of classical concepts through an interplay between commutative and non-commutative op…
Bohrification: From classical concepts to commutative algebras
Klaas Landsman
The Bohrification program is an attempt to interpret Bohr's mature doctrine of classical concepts as well as his earlier correspondence principle in the operator-algebraic formulat…
On the Colbeck-Renner Theorem
Klaas Landsman
In three papers Colbeck and Renner (Nature Communications 2:411, (2011); Phys. Rev. Lett. 108, 150402 (2012); arXiv:1208.4123) argued that "no alternative theory compatible with qu…
A bounded transform approach to self-adjoint operators: Functional calculus and affiliated von Neumann algebras
Christian Budde, Klaas Landsman
Spectral theory and functional calculus for unbounded self-adjoint operators on a Hilbert space are usually treated through von Neumann's Cayley transform. Based on ideas of Worono…
Quantization commutes with singular reduction: cotangent bundles of compact Lie groups
Jord Boeijink, Klaas Landsman, Walter van Suijlekom
We analyse the `quantization commutes with reduction' problem (first studied in physics by Dirac, and known in the mathematical literature also as the Guillemin-Sternberg Conjectur…
The Fine-Tuning Argument
Klaas Landsman
Our laws of nature and our cosmos appear to be delicately fine-tuned for life to emerge, in a way that seems hard to attribute to chance. In view of this, some have taken the oppor…
Is the quantum state real? An extended review of -ontology theorems
M. S. Leifer
Towards the end of 2011, Pusey, Barrett and Rudolph derived a theorem that aimed to show that the quantum state must be ontic (a state of reality) in a broad class of realist appro…
Constraints on determinism: Bell versus Conway-Kochen
Eric Cator, Klaas Landsman
Bell's Theorem from 1964 and the (Strong) Free Will Theorem of Conway and Kochen from 2009 both exclude deterministic hidden variable theories (or, in modern parlance, `ontological…
A Flea on Schroedinger's Cat
Klaas Landsman, Robin Reuvers
We propose a technical reformulation of the measurement problem of quantum mechanics, which is based on the postulate that the final state of a measurement is classical. Unlike the…