How come the spooky part of Double Slit experiment is not a result of us measuring it ?

[BigBadMuffin]

I've been looking up a lot of information about quantum mechanics, and something that I keep running into are people on youtube videos/documentaries claiming that the outcome of double slit experiment changes when we measure it because we measure it, i.e. our actions of measuring it are the ones causing a different outcome.

 

Is this just people passing the most obvious answer/their opinion as facts, or is this an actual problem with quantum mechanics but we don't know how to make sure ?

I know people on the internet will always try to be smarter than they are, but I've never seen anyone even try to bring any arguments to this.

 

Thanks.

[imatfaal]

There are methods which allow the experimenter to determine which slit each invididual photon/electron went through without disturbing them - but as soon as you do this the interference disappears.

 

You can read up on this (it is the first stage) at any good write up of the Quantum Eraser Experiment. What is really spooky is that you can measure the route each photon took (and lose interference) but erase the information after the photons have hit the screen and get the interference pattern back - Delayed Quantum Eraser Experiment

I have just noticed that Wiki calls my first stage as the second stage - here is the link

https://en.wikipedia.org/wiki/Quantum_eraser_experiment

Will have a look for a better one as I seem to remember this write up is pretty poor (wikipedians competing to be erudite and knowledgeable and failing to be either)

[BigBadMuffin]

There are methods which allow the experimenter to determine which slit each invididual photon/electron went through without disturbing them - but as soon as you do this the interference disappears.

 

You can read up on this (it is the first stage) at any good write up of the Quantum Eraser Experiment. What is really spooky is that you can measure the route each photon took (and lose interference) but erase the information after the photons have hit the screen and get the interference pattern back - Delayed Quantum Eraser Experiment

I have just noticed that Wiki calls my first stage as the second stage - here is the link

https://en.wikipedia.org/wiki/Quantum_eraser_experiment

Will have a look for a better one as I seem to remember this write up is pretty poor (wikipedians competing to be erudite and knowledgeable and failing to be either)

 

Wow! That is the most interesting quantum mechanic I've ever come across. I can't believe I've never heard of it before, thanks man!