so, its not that observing causes collapse, its that if your current state has a memory of interacting with a quantum system, you cant interact with a superposition of it that would contradict that previous measurement

he's harmless

unless you delete all traces of the measurement

I need to read this for myself.

Hm

This is hard to believe. I think I no longer can believe realism.

Ultra Big Brained

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

Yes Rhythm this is why I said QM is upstream of philosophy for me

@fuguer so could you say the idea of infinite dimensions is the same as the idea of infinite memory patterns?

I am going to take it step by step of the text book I got for now, Fuguer. Thanks though, but I am going to take it slowly.

retrieval in qm is pretty interesante

Li Chengfeng from the quantum information laboratory of the Chinese Academy of Sciences developed a solid-state quantum memory and demonstrated the photon computing function using time and frequency.

rare earth ion-doped crystals

Diamond has very high Raman gain in optical phonon mode of 40 THz and has a wide transient window in a visible and near-infrared band, which makes it suitable for being an optical memory with a very wide band. After the Raman storage interaction, the optical phonon decays into a pair of photons through the channel, and the decay lifetime is 3.5 ps, which makes the diamond memory unsuitable for communication protocol. **problem is, it only lasts 10 seconds**

in a way, our perception of reality and predictions of the future is intimately tied to the memory we have

```A. If one of the paths is lengthened then
the interference can be altered to ensure that all
photons strike detector B.```

Why is this?

```On that
site, the basic interferometer is shown as in figure 1
and it is explained that interference between the
two paths ensures that the photon always strikes
detector A. ```

what gives rise to classical realism is the fact that quantum information leaks and smears out into the environment in a redundant way that's hard to eradicate. this gives rise to the classical consistency and behavior our intuition expects

https://cdn.discordapp.com/attachments/634367565304561675/654553828686823444/machzehnder.gif

@fuguer memory/habit

Why would changing the length of one of the routes change which detector it hits?

because changing the length of the routes affects the phase of the light

it means the photons from the two different paths are no longer exactly interchangable

https://tenor.com/view/girl-beat-girl-vintage-1960-dance-gif-14289925

thats a diagram of the quantum eraser

uses a beam splitter crystal (BBO) to split one photon into two entangled photons

Does the interaction make it a wave or something, why is that important that they interact?

then by inducing a different polarization on the left and right slits, you can tell if the polarization matches and which path the photon took

because particles interact with themselves

thats what we mean when we say quantum particles act like waves

https://www.youtube.com/redirect?event=video_description&v=vOv8zYla1wY&q=http%3A%2F%2Fwww.univie.ac.at%2Fqfp%2Fpublications3%2Fpdffiles%2F1994-08.pdf&redir_token=YXUmr5A6cF9GN9ACnj29s5kBsWx8MTU3NjIxNTQ3NkAxNTc2MTI5MDc2&html_redirect=1 Paper on interaction free experiment

a single photon interacts with other versions of itself and this is responsible for most of the fundamental properties of light such as least action principle, snells law, inertia, etc

did this shift from god to QM

I'm just trying to follow

Feynman explains this all in a way that will blow your mind if you watch his QED video series