In several quantum information tasks, notably in the fields of quantum communication, cryptography, and sensing, classical information is encoded not in a quantum state but in an optical mode.

To establish operational reference frames for time, one requires physical clocks that periodically send signals to observers. The synchronisation between the various signals determines the quality of the time reference.

We introduce a software package that allows users to design and run simulations of thought experiments in quantum theory. In particular, it covers cases where reasoning agents are modelled as quantum systems, such as Wigner's friend experiment.

Designing encoding and decoding circuits to reliably send messages over many uses of a noisy channel is a central problem in communication theory. When studying the optimal transmission rates, it is usually assumed that these circuits can be…

The world is fundamentally quantum mechanical. That means that our minimal ontological commitment relies only on having a Hilbert space, a quantum state, and an evolution equation (Schroedinger's equation) together with a Hamiltonian.