We introduce the framework of general probabilistic theories (GPTs for short). GPTs are a
class of operational theories that generalize both finite-dimensional classical and quantum …

Recently, table-top experiments involving massive quantum systems have been proposed to
test the interface of quantum theory and gravity. In particular, the crucial point of the debate …

The formalism of generalized probabilistic theories (GPTs) was originally developed as a
way to characterize the landscape of conceivable physical theories. Thus, the GPT …

We show that the phase-space formulation of general probabilistic theories can be extended
to include a generalized time evolution and that it can describe a nonquantum hydrogenlike …

To date, there has been no experimental evidence that invalidates quantum theory. Yet it
may only be an effective description of the world, in the same way that classical physics is an …

Non-signalling quantum channels—relevant in, eg, the study of Bell and Einstein–Podolsky–
Rosen scenarios—may be decomposed as an affine combinations of local operations in …

We present the first instance where post-quantum steering is a stronger-than-quantum
resource for information processing–remote state preparation. In addition, we show that the …

Coin flipping is a fundamental cryptographic task where spatially separated Alice and Bob
wish to generate a fair coin flip over a communication channel. It is known that ideal coin …

How to understand the set of correlations admissible in nature is one outstanding open
problem in the core of the foundations of quantum theory. Here we take a complementary …

We introduce a general framework for analysing general probabilistic theories, which
emphasises the distinction between the dynamical and probabilistic structures of a system …