1.8k citations · 5.7k across the 50 of their papers we have counts for
52 papers
Operationalism, Causality, and Quantum Theory: a mostly time symmetric perspective
Lucien Hardy
This is a book about operational probabilistic theories. The standard approach in such theories is from a time forward perspective. In this book we mostly take a time symmetric per…
A diagrammatic language for the Causaloid framework
Nitica Sakharwade, Lucien Hardy
The Causaloid framework is an operational approach aimed to house both the radical aspects of General Relativity -- dynamic causal structure, and Quantum Theory -- indefiniteness,…
Indefinite Causal Structure and Causal Inequalities with Time-Symmetry
Luke Mrini, Lucien Hardy
Time-reversal symmetry is a prevalent feature of microscopic physics, including operational quantum theory and classical general relativity. Previous works have studied indefinite…
Paradox with Phase-Coupled Interferometers
Saba Etezad-Razavi, Lucien Hardy
A pair of interferometers can be coupled by allowing one path from each to overlap such that if the particles meet in this overlap region, they annihilate. It was shown by one of u…
Time Symmetry in Operational Theories
Lucien Hardy
The standard operational probabilistic framework (within which we can formulate Operational Quantum Theory) is time asymmetric. This is clear because the conditions on allowed oper…
Counting Risk Increments to Make Decisions During an Epidemic
Lucien Hardy
I propose a smartphone app that will allow people to participate in the management of their own safety during an epidemic or pandemic such as COVID-19 by enabling them to view, in…