In quantum mechanics, the wave function predicts probabilities of possible measurement
outcomes, but not which individual outcome is realized in each run of an experiment. This …

The possibility to communicate between spatially separated regions, without even a single
photon passing between the two parties, is an amazing quantum phenomenon. The …

Abstract Quantum Counterfactual Communication is the recently-proposed idea of using
quantum physics to send messages between two parties, without any matter/energy transfer …

We give a protocol for ghost imaging in a way that is always counterfactual—while imaging
an object, no light interacts with that object. This extends the idea of counterfactuality beyond …

Teleportation is a cornerstone of quantum technologies, and has played a key role in the
development of quantum information theory. Pushing the limits of teleportation is therefore of …

Counterfactual communication protocols are analyzed using three approaches: a classical
argument, the weak trace criterion, and the Fisher information criterion. It is argued that the …

We present a way of directly manipulating an arbitrary qubit, without the exchange of any
particles. This includes as an application the exchange-free preparation of an arbitrary …

Counterfactual communication, ie, a communication without particles traveling in the
transmission channel, is a bizarre quantum effect. Starting from interaction-free …

In standard communication information is carried by particles or waves. Counterintuitively, in
counterfactual communication particles and information can travel in opposite directions …

We explore how one might detect the dynamical quantum Cheshire cat proposed by
Aharonov et al We show that, in practice, we need to bias the initial state by …