851 citations · 11.3k across the 104 of their papers we have counts for
6 papers · 2 filters
Logical Pre- and Post-Selection paradoxes, measurement-disturbance and contextuality
M. S. Leifer, R. W. Spekkens
Many seemingly paradoxical effects are known in the predictions for outcomes of measurements made on pre- and post-selected quantum systems. A class of such effects, which we call…
Pre- and Post-selection paradoxes and contextuality in quantum mechanics
M. S. Leifer, R. W. Spekkens
Many seemingly paradoxical effects are known in the predictions for outcomes of intermediate measurements made on pre- and post-selected quantum systems. Despite appearances, these…
Entanglement under restricted operations: Analogy to mixed-state entanglement
Stephen D. Bartlett, Andrew C. Doherty, Robert W. Spekkens +1
We show that the classification of bi-partite pure entangled states when local quantum operations are restricted yields a structure that is analogous in many respects to that of mi…
Contextuality for preparations, transformations, and unsharp measurements
R. W. Spekkens
An operational definition of contextuality is introduced which generalizes the standard notion in three ways: (1) it applies to arbitrary operational theories rather than just quan…
Decoherence-full subsystems and the cryptographic power of a private shared reference frame
Stephen D. Bartlett, Terry Rudolph, Robert W. Spekkens
We show that private shared reference frames can be used to perform private quantum and private classical communication over a public quantum channel. Such frames constitute a nove…
In defense of the epistemic view of quantum states: a toy theory
Robert W. Spekkens
We present a toy theory that is based on a simple principle: the number of questions about the physical state of a system that are answered must always be equal to the number that…