**Collection Number**C06009

**Collection Date**

**Collection Type**Conference/School

Perimeter Institute will host an international conference from July 18-21, 2006, in honour of Abner Shimony, one of the most eminent physicist-philosophers of our time. Professor Shimony is renowned for his contribution to the famous Bell-CHSH inequality and for many other contributions in the foundations of physics and philosophy.
Talks and discussions will cover a wide range of subjects within physics and philosophy, including theoretical and experimental aspects of quantum entanglement and non-locality, relativistic causality, quantum measurement problem, probability theory, temporal transience, the mind-body problem, and scientific realism.

## Unfinished Work: A Bequest

Here are some topics in physics and philosophy on which my work is incomplete. I invite my friends in this assembly, and their colleagues and students, to continue the work and inform me about their progress.
1. There is a well known theorem of Wigner that a necessary condition for a quantity M of a physical system O to be measured without distortion (i.e., if O is in an eigenstate u of M just prior to the measurement then it remains in u immediately afterwards) is the commutation of M with any additive conserved quantity.

## No Information Without Disturbance Myths and Facts about Quantum Measurements

Paul Busch
University of York

In this talk I will discuss the question of how to characterize, in an operationally meaningful way, the inevitable disturbance of a quantum system in a measurement. I will review some well-known limitations of quantum measurements (facts), and give precise formulations of trade-off relations between information gain and disturbance. Famous examples among these limitations are the uncertainty principle, the complementarity principle, and Wigners theorem on limitations on measurements imposed by conservation laws.

## Newtons Methodology

Bill Harp
Western University

Newtons methodology is significantly richer than the hypothetico-deductive model. It is informed by a richer ideal of empirical success that requires not just accurate prediction but also accurate measurement of parameters by the predicted phenomena. It accepts theory mediated measurements and theoretical propositions as guides to research Kuhn has suggested that along with revolutionary changes in scientific theory come revolutionary changes in methodology.

## Peirce, James, and the Quantum Bayesians

Chris Fuchs
Raytheon Company

## A proposed Test of the Local Casuality of Spacetime

Adrian Kent
University of Cambridge

A theory governing the metric and matter fields in spacetime is {\it
locally causal} if the probability distribution for the fields in any region is determined solely by physical data in its past, i.e. it is independent of events at space-like separated points.

## From Bell Inequalities to Secure Key Distribution

Nicolas Gisin
Université de Genève

Abner Shimony is well-known for, among other contributions, his seminal work on Bell inequalities, turning a philosophical question into an experimental one. In my presentation I like to remind us how this experimental field is nowadays feeding into applied science. This is happening both in terms of the involved technologies and in the conceptual tools.

## Local and Nonlocal Quantum Tests

Anton Zeilinger
Institute for Quantum Optics and Quantum Information (IQOQI) - Vienna

## Quantum in Gravity?

I will report my efforts to describe elementary Quantum behaviours, specifically single-particle interference and two-particle entanglement, in an accelerating frame.

## Inefficient Detectors Do Not Bar Bell Theorems Without Inequalities

Entanglement swapping is such a powerful technique for dealing with EPR problems, that it can handle inefficient counters and Bell Theorems without inequalities, even for two particles. We will examine some of the results and pitfalls.

## Rotational analysis of a vibrational transition in the 199Hg2 molecule: a first step in an experimental realization of a spin-1/2 particle version of the EPR experiment Authors: Edward S. Fry and Xinmei Qu

An experimental realization of our spin-1/2 particle version of the Einstein-Podolsky-Rosen (EPR) experiment will be briefly reviewed. In the proposed experiment, two 199Hg atoms in the ground 1S0 electronic state, each with nuclear spin I=1/2, are generated in an entangled state with total nuclear spin zero. Such a state can be obtained by dissociation of a 199Hg2 molecule (dimer) using a spectroscopically selective stimulated Raman process.