A Double double slit experiment and path information

Heidi
Messages
420
Reaction score
40
Hi Pfq
My question is about this experiment:
https://www.nature.com/articles/s41598-020-68181-1
(the link was given by DrChinese.
If all the impacts are conserved no interference can be seen on the screens.
but if we only take the impacts (Y, yi) where Y is always at the same position on the left screen
the yi will give an interferentce pattern (not always withe a perfect fringe visibility.
if the left screen is in the plane of the slits, and Y is on one slit we will have a full path information and no interference pattern on the right. same thing if Y is on the other slit:
if we superpose these two patterns we will get the "bullet" pattern.
suppose now that the left screen is at a given distance behind the left screen.
Is there a subset of the Y impacts on the left screen so that the yi would mimick the case where one of the right slit is not open (always the same)?
 
Physics news on Phys.org
Yes, there is a subset of the Y impacts on the left screen so that the yi would mimic the case where one of the right slit is not open. This can be achieved by choosing the Y impacts such that the interference pattern on the right screen is minimized. To do this, the Y impacts should be chosen to cancel out the contributions from the two slits so that the total interference pattern is zero.
 
Not an expert in QM. AFAIK, Schrödinger's equation is quite different from the classical wave equation. The former is an equation for the dynamics of the state of a (quantum?) system, the latter is an equation for the dynamics of a (classical) degree of freedom. As a matter of fact, Schrödinger's equation is first order in time derivatives, while the classical wave equation is second order. But, AFAIK, Schrödinger's equation is a wave equation; only its interpretation makes it non-classical...
I asked a question related to a table levitating but I am going to try to be specific about my question after one of the forum mentors stated I should make my question more specific (although I'm still not sure why one couldn't have asked if a table levitating is possible according to physics). Specifically, I am interested in knowing how much justification we have for an extreme low probability thermal fluctuation that results in a "miraculous" event compared to, say, a dice roll. Does a...
Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. Towards the end of the first lecture for the Qiskit Global Summer School 2025, Foundations of Quantum Mechanics, Olivia Lanes (Global Lead, Content and Education IBM) stated... Source: https://www.physicsforums.com/insights/quantum-entanglement-is-a-kinematic-fact-not-a-dynamical-effect/ by @RUTA
Back
Top