73 citations · 348 across the 18 of their papers we have counts for
17 papers · 1 filter
Reply to the Comment on "The Axiom of Choice and the No-Signalling Principle"
Ämin Baumeler, Borivoje Dakić, Flavio Del Santo +1
We clarify the meaning of a probabilistic no-signalling strategy in Ref [Proc. R. Soc. A 481, 20240601]. For every fixed input, the deterministic strategy constructed using the Axi…
Graphical Tests of Causality
Ämin Baumeler, Eleftherios-Ermis Tselentis, Stefan Wolf
Bell inequalities limit the possible observations of non-communicating parties. Here, we present analogous inequalities for any number of communicating parties under the causal con…
No quantum advantage for violating fixed-order inequalities?
Veronika Baumann, Ämin Baumeler, Eleftherios-Ermis Tselentis
In standard quantum theory, the causal relations between operations are fixed. One can relax this notion by allowing for dynamical arrangements, where operations may influence the…
Flow of dynamical causal structures with an application to correlations
Ämin Baumeler, Stefan Wolf
Causal models capture cause-effect relations both qualitatively - via the graphical causal structure - and quantitatively - via the model parameters. They offer a powerful framewor…
Admissible Causal Structures and Correlations
Eleftherios-Ermis Tselentis, Ämin Baumeler
It is well-known that if one assumes quantum theory to hold locally, then processes with indefinite causal order and cyclic causal structures become feasible. Here, we study qualit…
Trading causal order for locality
Ravi Kunjwal, Ämin Baumeler
Quantum theory admits ensembles of quantum nonlocality without entanglement (QNLWE). These ensembles consist of seemingly classical states (they are perfectly distinguishable and n…
Unlimited non-causal correlations and their relation to non-locality
Ämin Baumeler, Amin Shiraz Gilani, Jibran Rashid
Non-causal correlations certify the lack of a definite causal order among localized space-time regions. In stark contrast to scenarios where a single region influences its own caus…
Equivalence of Grandfather and Information Antinomy Under Intervention
Ämin Baumeler, Eleftherios Tselentis
Causal loops, e.g., in time travel, come with two main problems. Most prominently, the grandfather antinomy describes the potentiality to inconsistencies: a problem of logical natu…
Bell Correlations and the Common Future
Ämin Baumeler, Julien Degorre, Stefan Wolf
Reichenbach's principle states that in a causal structure, correlations of classical information can stem from a common cause in the common past or a direct influence from one of t…
Quantum computation with indefinite causal structures
Mateus Araújo, Philippe Allard Guérin, Ämin Baumeler
One way to study the physical plausibility of closed timelike curves (CTCs) is to examine their computational power. This has been done for Deutschian CTCs (D-CTCs) and post-select…
Computational tameness of classical non-causal models
Ämin Baumeler, Stefan Wolf
We show that the computational power of the non-causal circuit model, i.e., the circuit model where the assumption of a global causal order is replaced by the assumption of logical…
Causality - Complexity - Consistency: Can Space-Time Be Based on Logic and Computation?
Ämin Baumeler, Stefan Wolf
The difficulty of explaining non-local correlations in a fixed causal structure sheds new light on the old debate on whether space and time are to be seen as fundamental. Refrainin…
Non-causal computation
Ämin Baumeler, Stefan Wolf
Computation models such as circuits describe sequences of computation steps that are carried out one after the other. In other words, algorithm design is traditionally subject to t…
Device-independent test of causal order and relations to fixed-points
Ämin Baumeler, Stefan Wolf
Bell non-local correlations cannot be naturally explained in a fixed causal structure. This serves as a motivation for considering models where no global assumption is made beyond…
The space of logically consistent classical processes without causal order
Ämin Baumeler, Stefan Wolf
Classical correlations without predefined causal order arise from processes where parties manipulate random variables, and where the order of these interactions is not predefined.…
Maximal incompatibility of locally classical behavior and global causal order in multi-party scenarios
Ämin Baumeler, Adrien Feix, Stefan Wolf
Quantum theory in a global space-time gives rise to non-local correlations, which cannot be explained causally in a satisfactory way; this motivates the study of theories with redu…
Quantum Private Information Retrieval has linear communication complexity
Ämin Baumeler, Anne Broadbent
In Private Information Retrieval (PIR), a client queries an n-bit database in order to retrieve an entry of her choice, while maintaining privacy of her query value. Chor, Goldreic…