Bit commitment(BC) is a cryptographic primitive involving two mistrustful parties, Alice and Bob, wherein one seeks to have Alice submit an encoded bit of information to Bob in such a way that Bobâ€¦ (More)

We present a quantum protocol for the task of weak coin flipping. We find that, for one choice of parameters in the protocol, the maximum probability of a dishonest party winning the coin flip if theâ€¦ (More)

Stephen D. Bartlett, Terry Rudolph, 3 and Robert W. Spekkens School of Physics, The University of Sydney, Sydney, New South Wales 2006, Australia Optics Section, Blackett Laboratory, Imperial Collegeâ€¦ (More)

Does the quantum state represent reality or our knowledge of reality? In making this distinction precise, we are led to a novel classification of hidden variable models of quantum theory. We showâ€¦ (More)

Gilad Gour, 2, âˆ— Markus P. MÃ¼ller, 4, â€ Varun Narasimhachar, 5, â€¡ Robert W. Spekkens, Â§ and Nicole Yunger Halpern 6, Â¶ Institute for Quantum Science and Technology, University of Calgary, 2500â€¦ (More)

Quantum theory can be viewed as a generalization of classical probability theory, but the analogy as it has been developed so far is not complete. Whereas the manner in which inferences are made inâ€¦ (More)

Two notions of nonclassicality that have been investigated intensively are: (i) negativity, that is, the need to posit negative values when representing quantum states by quasiprobabilityâ€¦ (More)

We introduce a graphical framework for Bayesian inference that is sufficiently general to accommodate not just the standard case but also recent proposals for a theory of quantum Bayesian inferenceâ€¦ (More)

The ideas of thermodynamics have proved fruitful in the setting of quantum information theory, in particular the notion that when the allowed transformations of a system are restricted, certainâ€¦ (More)