At first sight the Aharonov- Bohm effect appears nonlocal, though not in the way EPR/Bell correlations are generally acknowledged to be nonlocal. This paper applies an analysis of nonlocality to the Aharonov- Bohm effect to show that its peculiarities may be blamed either on a failure of a principle of local action or on a failure of a principle of separability. Different interpretations of quantum mechanics disagree on how blame should be allocated. The parallel between the Aharonov- Bohm effect and (...) violations of Bell inequalities turns out to be so close that a balanced assessment of the nature and significance of quantum nonlocality requires a detailed study of both effects. (shrink)

A quantum state represents neither properties of a physical system nor anyone’s knowledge of its properties. The important question is not what quantum states represent but how they are used—as informational bridges. Knowing about some physical situations, an agent may assign a quantum state to form expectations about other possible physical situations. Quantum states are objective: only expectations based on correct state assignments are generally reliable. If a quantum state represents anything, it is the objective probabilistic relations between its backing (...) conditions and its advice conditions. This paper offers an account of quantum states and their function as informational bridges, in quantum teleportation and elsewhere. (shrink)

Quantum mechanics predicted the Aharonov-Bohm effect and violations of Bell inequalities before either phenomenon was experimentally verified. It is now commonly taken to explain both phenomena. Maudlin has pointed out significant disanalogies between these phenomena. But he has failed to appreciate the striking analogy that emerges when one examines the structure of their quantum mechanical explanations. The fact that each may be explained quantum mechanically in terms of a locally-acting, but nonseparable process suggests that the lesson of quantum nonlocality may (...) be that while there is no action at a distance, the world is nonseparable. (shrink)

Those looking for holism in contemporary physics have focused their attention primarily on quantum entanglement. But some gauge theories arguably also manifest the related phenomenon of nonseparability. While the argument is strong for the classical gauge theory describing electromagnetic interactions with quantum “particles”, it fails in the case of general relativity even though that theory may also be formulated in terms of a connection on a principal fiber bundle. Anandan has highlighted the key difference in his analysis of a supposed (...) gravitational analog to the Aharonov-Bohm effect. By contrast with electromagnetism in the original Aharonov-Bohm effect, gravitation is separable and exhibits no novel holism in this case. Whether the nonseparability of classical gauge theories of non-gravitational interactions is associated with holism depends on what counts as the relevant part-whole relation. Loop representations of quantized gauge theories of non- gravitational interactions suggest that these conclusions about holism and nonseparability may extend also to quantum theories of the associated fields. (shrink)

The Bohm-Bub hidden-variable theory is able to predict the results of measuring a quantum system only in the special case where the set of commuting observables being measured is complete. To handle the much more common case where the set is incomplete, Tutsch has proposed a generalization of the Bohm-Bub model. Unfortunately, as we show here, Tutsch's original method does not yield the correct quantum mechanical transition probabilities. On the other hand, Belinfante's modification of Tutsch's method does yield the correct (...) probabilities, and it gives a satisfactory hidden-variable theory of partial measurement for the case where one or more commuting variable(s) are measured at a single space-time point. In the case where the variables are measured at different space-time points, the theory is inadequate, due to the fact that it is not relativistically covariant, and does not take relaxation of the hidden variables into account. (shrink)

We present a simple first step toward a relativistically covariant generalization of the Bohm-Bub hidden-variable theory. The model is applicable to spin measurement on a single Dirac particle and describes the collapse of the state vector to a spin-up or spin-down state. The essential postulate is that the hidden-variable vector transforms in the same way as the state vector under a Lorentz transformation. This yields a covariant collapse equation, which reduces to the ordinary Bohm-Bub equation for an observer stationary with (...) respect to the particle and shows a time dilated collapse for a moving observer. The model yields the correct quantum transition probabilities for all observers. (shrink)

Richard Healey argues that the Aharonov- Bohm effect demands the recognition of either nonlocal or nonseparable physics in much the way that violations of Bell's inequality do. A careful examination of the effect and the arguments, though, shows that Healey's interpretation of the Aharonov- Bohm effect depends critically on his interpretation of gauge theories, and that the analogy with violations of Bell's inequalities fails.

Richard Healey argues that the Aharonov-Bohm effect demands the recognition of either nonlocal or nonseparable physics in much the way that violations of Bell's inequality do. A careful examination of the effect and the arguments, though, shows that Healey's interpretation of the Aharonov-Bohm effect depends critically on his interpretation of gauge theories, and that the analogy with violations of Bell's inequalities fails.

In this classic work David Bohm, writing clearly and without technical jargon, develops a theory of quantum physics which treats the totality of existence as an unbroken whole.

David Bohm argues that our fragmented, mechanistic notion of order permeates not only modern science and technology today, but also has profound implications ...

"The ancient and modern question of what is the nature of man and his activity and what ought to be the directions pursued in this activity is once again being ...

From the Introduction: This inquiry is concerned with the themes of praxis and action in four philosophic movements: Marxism, existentialism, pragmatism, and analytic philosophy. It is rare that these four movements are considered in a single inquiry, for there are profound differences of emphasis, focus, terminology, and approach represented by these styles of thought. Many philosophers believe that similarities among these movements are superficial and that a close examination of them will reveal only hopelessly unbridgeable cleavages. While respecting the genuine (...) fundamental differences of these movements, this inquiry is undertaken in the spirit of showing that there are important common themes and motifs in what first appears to be a chaotic babble of voices. I intend to show that the concern with man as an agent has been a primary focal point of each of these movements and further that each contributes something permanent and important to our understanding of the nature and context of human activity. (shrink)

"A fascinating and timely treatment of the objectivism versus relativism debates occurring in philosophy of science, literary theory, the social sciences, ...

This book offers students a philosophical introduction to the ethical foundations of business management. It combines lessons from Kant with virtue ethics and also touches upon additional approaches such as utilitarianism. At the core of the book lies the concept of the nexus of imperfect managerial duty: building and reinforcing the virtuous managerial team, engaging in reasoned discourse among all stakeholders, and diligently pursuing business responsibilities, including the creative efforts necessary for modern organizations. Case illustrations of these applications are presented (...) throughout the book, including chapter appendices. Ancillary videos, test and answer banks and sample syllabi are available online via the author’s website. (shrink)

Drawing freely and expertly from Continental and analytic traditions, Richard Bernstein examines a number of debates and controversies exemplified in the works of Gadamer, Habermas, Rorty, and Arendt. He argues that a "new conversation" is emerging about human rationality—a new understanding that emphasizes its practical character and has important ramifications both for thought and action.

Die hier vorgelegte Arbeit enthält drei inhaltlich zusammenhängende erkenntnistheoretische Untersuchungen über Probleme des Verstehens und Interpretierens von Rede und Text. Das _Ziel der Untersuchungen besteht jeweils darin, die von unterschiedlichen Autoren vorgebrachten Behauptungen einer erfahrungsunabhängigen Geltung der Prinzipien des Verstehens und Interpretierens einer eingehenden Prüfung zu unterziehen_ – sei es im Zusammenhang mit der im Rahmen der Sozialen Erkenntnistheorie geführten Diskussion über den Status von menschlichen Zeugnissen, sei es in Form einer Kritik des von Karl Popper im Kontext seiner Situationslogik (...) vertretenen Rationalitätsprinzips oder auch in der eingehenden Analyse der Argumente, die von analytischen Philosophen zugunsten einer erfahrungsunabhängigen Geltung des_ principle of charity_ vorgebracht wurden. Diese kritische Ausrichtung der Arbeit im Sinne der Zurückweisung der genannten Behauptungen hat jedoch auch eine konstruktive Dimension: Sie zeigt die Möglichkeit einer naturalistischen Hermeneutik, d.h. einer Verstehenslehre, die konsequent auf die Beanspruchung apriorischen Wissens verzichtet. (shrink)

In this paper I argue that resource allocation in publicly funded medical systems cannot be done using a purely substantive theory of justice, but must also involve procedural justice. I argue further that procedural justice requires institutions and that these must be “local” in a specific sense which I define. The argument rests on the informational constraints on any non-market method for allocating scarce resources among competing claims of need. However, I resist the identification of this normative account of local (...) justice with the actual approach to local decision-making taken within the UK National Health Service. I illustrate my argument with reference to the case of provision of In Vitro Fertilisation within the UK NHS. (shrink)

To Serve With Honor should be required reading for all members of the officer corps of the United States military. Beyond that, it should be made required reading for all United States military academies, ROTC and officer candidate programs. This treatise on military ethics goes a long way in bridging the gap between the military and society's understanding of the military's ethical dilemma. It is a must for the student of military affairs. International Social Science Review To Serve With Honor (...) is the first book by an American to focus on the validity of current standards of military ethics in more than a century. This thoughtful study begins with the premise that the military profession is qualitatively different from any other profession. Author Richard Gabriel uses this assumption to address such vital questions as What are the limits of military obedience? and When does a soldier have an obligation to resist the orders of his superiors? (shrink)