Collapsing the wavefuntion to an Energy Eigenfunction?

mkarydas
Messages
8
Reaction score
0
Is there an experiment that can measure the energy of a single particle so immediately after it has collapsed to one of the energy eigenfunctions?
The problem is that all experiments i can think of are about measuring the position of a the particle so we collapse it to its delta function. But how can someone experimentally measure the energy of a particle ?
 
Physics news on Phys.org
What's your question?

How someone measures experimentally the energy of a particle? - well its done all the time in particle colliders.

How one measures it immediately after - simply do the same experiment immediately after - of course if the measurement didn't destroy it.

Thanks
Bill
 
Last edited:
thats exactly my question..how does one measure the energy of a particle without measuring its position first?
 
mkarydas said:
thats exactly my question..how does one measure the energy of a particle without measuring its position first?

Mass spectrometer is one way - probably others as well.

Thanks
Bill
 

Thread 'Schrödinger equation and classical wave equation'

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...
View full post »

Thread 'Quantum Entanglement is a Kinematic Fact, not a Dynamical Effect'

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
View full post »

Thread 'Is Maxwell's electromagnetism an effective (field) theory?'

Is it possible, and fruitful, to use certain conceptual and technical tools from effective field theory (coarse-graining/integrating-out, power-counting, matching, RG) to think about the relationship between the fundamental (quantum) and the emergent (classical), both to account for the quasi-autonomy of the classical level and to quantify residual quantum corrections? By “emergent,” I mean the following: after integrating out fast/irrelevant quantum degrees of freedom (high-energy modes...
View full post »

Similar threads

I Completeness of Eigenfunctions of Hermitian Operators
Replies
22
Views
2K
A Can particles appear and disappear "with" a cause?
Replies
1
Views
2K
B A stupidly basic question about expectation value
Replies
8
Views
2K
I Quantum particle's state in momentum eigenfunctions basis
Replies
16
Views
2K
I Particle in free space - what happens to the wave function after measurement?
Replies
2
Views
2K
B Can someone please explain to me the motion of an electron?
Replies
11
Views
2K
I Collapse of wavefunction into a forbidden eigenstate for a free particle
2
Replies
75
Views
5K
B Extremely elementary questions about QM
Replies
24
Views
3K
I Particle in the box eigenfunctions
2
Replies
60
Views
8K
I Representation of Spin 1/2 quantum state
2
Replies
61
Views
5K

Hot Threads

Recent Insights

Back
Top