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Quantum mechanical interaction-free measurements
A novel manifestation of nonlocality of quantum mechanics is presented. It is shown that it is possible to ascertain the existence of an object in a given region of space without interacting with it.Expand
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Complete description of a quantum system at a given time
A generalization of the description of a quantum system in the time interval between two measurements is presented. A new concept of a generalized state is introduced. Generalized states yield aExpand
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The Two-State Vector Formalism of Quantum Mechanics
We present the two-state vector formalism of quantum mechanics. It is a time-symmetrized approach to standard quantum theory particularly helpful for the analysis of experiments performed on pre- andExpand
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Past of a quantum particle
Although there is no consensus regarding the ``reality'' of the past of a quantum particle, in situations where there is only one trajectory with a nonvanishing quantum wave of the particle betweenExpand
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Torque and force on a magnetic dipole
Recent controversies about torque and force on a magnetic dipole are discussed. Three essentially different current loop models are analyzed. Although all models yield the same expression for theExpand
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Asking photons where they have been.
We present surprising experimental evidence regarding the past of photons passing through an interferometer. The information about the positions through which the photons pass in the interferometerExpand
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The Two-State Vector Formalism: An Updated Review
The two-state vector formalism of quantum mechanics is a time-symmetrized approach to standard quantum theory particularly helpful for the analysis of experiments performed on preand post-selectedExpand
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On schizophrenic experiences of the neutron or why we should believe in the many‐worlds interpretation of quantum theory
Abstract This is a philosophical paper in favor of the many‐worlds interpretation (MWI) of quantum theory. The necessity of introducing many worlds is explained by analyzing a neutron interferenceExpand
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Surprising quantum effects
Abstract We consider circumstances wherein a quantum-mechanical system is subjected to a varied sequence of measurements, some of which are substantially more precise than others. Such systems areExpand
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Role of potentials in the Aharonov-Bohm effect
There is a consensus today that the the main lesson of the Aharonov-Bohm effect is that a picture of electromagnetism based on the local action of the field strengths is not possible in quantumExpand
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