We provide a physical prescription based on interferometry for introducing the total phase of
a mixed state undergoing unitary evolution, which has been an elusive concept in the past. …

We investigate the geometry of the Josephson tunneling current between two superconductors
separated by an insulator. We obtain the geometric phase and the Fubini-Study metric in …

The task of creating a quantum theory of gravity is compared with Einstein's creation of a
relativistic theory of gravity. The philosophical and physical foundations of this theory are briefly …

A cyclic evolution of a pure quantum state is characterized by a closed curve γ in the
projective Hilbert space PH , equipped with the Fubini-Study geometry. It is known that the …

Surprisingly, neutral particles (such as neutrons) with electric dipoles can be accelerated by
uniform electromagnetic fields. The force responsible, a consequence of the so-called …

[en] The quantization of circulation and the equation relating the rate of change of phase to
the chemical potential in superfluid helium are generalized covariantly. This provides a gauge…

The duality found by Aharonov and Casher for topological phases in the electromagnetic
field is generalized to an arbitrary linear interaction. This provides a heuristic principle for …

The nature of a physical law is examined, and it is suggested that there may not be any
fundamental dynamical laws. This explains the intrinsic indeterminism of quantum theory. The …

[en] The effect on electromagnetic systems due to a background gravitational field is studied.
A perturbation theory is developed to determine the modification of a stationary …

A quantum equivalence principle is formulated by means of a gravitational phase operator
which is an element of the Poincare group. This is applied to the spinning cosmic string which …