Witnessing objectivity on a quantum computer

On Classical and Quantum Objectivity

We propose a conceptual framework for understanding the relationship between observables and operators in mechanics. To do so, we introduce a postulate that establishes a correspondence between the objective properties permitting to identify physical states and the symmetry transformations that modify their gauge dependant properties. We show that the uncertainty principle results from a faithf...

Observation and Quantum Objectivity

Observation and Quantum Objectivity

The paradox of Wigner’s friend challenges the objectivity of description in quantum theory. A pragmatist interpretation can meet this challenge by judicious appeal to decoherence. On this interpretation, quantum theory provides situated agents with resources for predicting and explaining what happens in the physical world— not conscious observations of it. Even in Wigner’s friend scenarios, di¤...

On consistency of quantum theory and macroscopic objectivity

Discussions on the measurement problem in quantum mechanics are often tied with preconceptions about what physics should be, thus influencing what one appreciates to be or not to be a problem. Let us therefore first declare the preconceptions inherent in this contribution. Physics deals primarily with experiments that are reproducible in a laboratory and with the outcomes of these experiments. ...

Simulating Quantum Dynamics On A Quantum Computer

Nathan Wiebe, 2 Dominic W. Berry, Peter Høyer, 3 and Barry C. Sanders 4 Institute for Quantum Information Science, University of Calgary, Alberta T2N 1N4, Canada Institute for Quantum Computing, University of Waterloo, Ontario N2L 3G1, Canada Department of Computer Science, University of Calgary, Alberta T2N 1N4, Canada Department of Physics & Astronomy, University of Calgary, Alberta T2N 1N4, ...