112 citations · 504 across the 18 of their papers we have counts for
18 papers
Quantum theory is logically inevitable
Lars M. Johansen
General relativity required the abandonment of Euclidean geometry. Here we show that quantum theory requires the abandonment of classical logic. We show that the Hilbert space repr…
Non-ideal classical measurements and quantum measurements: a comparative study
Lars M. Johansen, Amir Kalev, Pier A. Mello
Measurements on classical systems are usually idealized and assumed to have infinite precision. In practice, however, any measurement has a finite resolution. We investigate the th…
Order Symmetry of Weak Measurements
Lars M. Johansen, Pier A. Mello
Weak values are usually associated with weak measurements of an observable on a pre- and post-selected ensemble. We show that more generally, weak values are proportional to the co…
Quantum Mechanics of Successive Measurements with Arbitrary Meter Coupling
Lars M. Johansen, Pier A. Mello
We study successive measurements of two observables using von Neumann's measurement model. The two-pointer correlation for arbitrary coupling strength allows retrieving the initial…
A unique quasi-probability for projective yes-no measurements
Lars M. Johansen
From an analysis of projective measurements, it is shown that the Wigner rule is the unique operational quasi-probability for the post-measurement state. A unique pre-measurement q…
Quantum theory of successive projective measurements
Lars M. Johansen
We show that a quantum state may be represented as the sum of a joint probability and a complex quantum modification term. The joint probability and the modification term can both…