252 research outputs found
Are the 'weak measurements' really measurements?
Weak measurements can be seen as an attempt at answering the 'Which way?'
question without destroying interference between the pathways involved. Unusual
mean values obtained in such measurements represent the response of a quantum
system to this 'forbidden' question, in which the 'true' composition of virtual
pathways is hidden from the observer. Such values indicate a failure of a
measurement where the uncertainty principle says it must fail, rather than
provide an additional insight into physical reality
Classification of resonance Regge trajectories and a modified Mulholland formula
We employ a simple potential model to analyse the effects which a Regge
trajectory, correlating with a bound or a metastable state at zero angular
momentum, has on an integral cross section. A straightforward modification of
the Mulholland formula of Macek et al is proposed for more efficient separation
of the resonance contribution.Comment: 4 pages, 5 figure
- …