Science

mindwalker_i

(4,407 posts)

84. Thank you for your interest

Sun May 18, 2014, 01:44 AM

May 2014

To be perfectly truthful, I'm somewhat of a quack, or at least I feel like it. I've never built physics experiments or done anything like it. What's really cool is that I can apply some of the engineering-related things that I've done to this project: I built a simple laser animation system a while back, and learned how to get a Linux system to talk to a microcontroller (PIC18F2550/4550), to position galvanometers to draw things. Now I'm using that to move the interference pattern around over a light detector.

I did some work making pieces for my optical mounts today, and got better results than I have before. Earlier this week I cleaned up my milling machine, took it apart, got the crap out, and added synthetic lube. That helps a frigging lot! I need to make some more of these pieces, but hopefully by tomorrow I can get the first stage (Z direction) working, then do the next stage. It's tough, but I'm making slow progress.

Once I get the mounts built, I'll build up the interferometer and try to take some pictures to post.

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Quantum Entanglement, Dark Counts, Coincidence Detection [View all] mindwalker_i Jul 2013 OP

This is me after reading your post : darkangel218 Jul 2013 #1

Oh, sorry about that mindwalker_i Jul 2013 #2

Nooo, its my fault. darkangel218 Jul 2013 #3

This message was self-deleted by its author cstanleytech May 2015 #91

I understood every bit of it... nebenaube Jul 2013 #4

Mach-Zehnder interferometers are interesting mindwalker_i Jul 2013 #5

knowing they exist and know what everyone else calls them are two different things. nebenaube Jul 2013 #6

Off the shelf? mindwalker_i Jul 2013 #7

I don't see why what I need would be any bigger then say a .22 slug (for lack of a better reference) nebenaube Jul 2013 #37

See my post currently at the bottom mindwalker_i Jul 2013 #39

Hey, so are you doing this on your own dime? napoleon_in_rags Jul 2013 #8

Pick up that book he mentioned caraher Jul 2013 #9

You're at Powell's in Portland? I'm jealous. napoleon_in_rags Jul 2013 #10

Yeah me too mindwalker_i Jul 2013 #17

I was on Tuesday caraher Jul 2013 #12

BTW, this is still pricey stuff caraher Jul 2013 #13

Youre plan isn't mad, its pure genius. Set up a chemistry lab too. napoleon_in_rags Jul 2013 #14

I gotta say it again - genius. napoleon_in_rags Jul 2013 #15

In chemistry they worry a lot about "technique" caraher Jul 2013 #16

That's how I would start if I were you. napoleon_in_rags Jul 2013 #18

Yeah, I'm doing it on my own dime mindwalker_i Jul 2013 #19

Okay, thanks for that info. Question 2: napoleon_in_rags Jul 2013 #21

Yes, I think it's possible mindwalker_i Jul 2013 #22

Interesting results are good. But be careful young mindwalker.... napoleon_in_rags Jul 2013 #23

Interesting take mindwalker_i Jul 2013 #24

"keep in mind that quantum encryption exists" napoleon_in_rags Jul 2013 #25

Snowden leaked that the govt. is tapping everything mindwalker_i Jul 2013 #26

What's available now is quantum-secured distribution of encryption keys caraher Jul 2013 #28

I think I switched topics without telling anyone mindwalker_i Jul 2013 #31

Aw-ight, sir. napoleon_in_rags Jul 2013 #30

That online lab is a really interesting idea mindwalker_i Jul 2013 #32

It would be a big money saver for all interested. napoleon_in_rags Jul 2013 #33

Sounds like handy stuff caraher Jul 2013 #35

I don't think this can work, but... caraher Jul 2013 #27

But discussing/arguing about it can be fun too mindwalker_i Jul 2013 #36

Part of it is preserving causality caraher Jul 2013 #41

Nature seemed pretty good at enforcing Newton's laws mindwalker_i Jul 2013 #42

I think the Excelitas detectors for education have a 500 Hz dark count rate caraher Jul 2013 #29

Coincidence count rates from downconversion vary a LOT caraher Jul 2013 #11

That's a log of really good information! mindwalker_i Jul 2013 #20

I'm slowly figuring out what you're doing... caraher Jul 2013 #34

Sir, you've just saved me a LOT of pain mindwalker_i Jul 2013 #38

I do want to think a bit more about your experiment... caraher Jul 2013 #40

I just added your message to my file :) mindwalker_i Jul 2013 #43

Well, what I was getting at is only partially-baked caraher Jul 2013 #44

OK, I get it now caraher Jul 2013 #45

I think my explanation isn't quite right, but close caraher Jul 2013 #47

I'm going to have to read through this a few times mindwalker_i Jul 2013 #49

To be clear... caraher Jul 2013 #53

Any progress on the experiment? idkiigmy May 2014 #70

I'm halfway through the Ellerman paper caraher May 2014 #71

First of all, thanks for the links! mindwalker_i May 2014 #72

Cool, keep us posted idkiigmy May 2014 #73

I've already bought the most expensive equipment (I hope) mindwalker_i May 2014 #74

Good mounting hardware helps immensely caraher May 2014 #77

Sorry for he late reply, bu yeah, I've been working with an optical breadboard mindwalker_i May 2014 #79

I might get one of those Sherlines someday caraher May 2014 #80

I like their stuff a lot mindwalker_i May 2014 #81

I actually find aluminum easier to machine than plastic caraher May 2014 #82

So... maybe you should use collinear Type II? caraher Jul 2013 #46

Type II Collinear? mindwalker_i Jul 2013 #48

Ok, I see basically what this is mindwalker_i Jul 2013 #50

Close caraher Jul 2013 #54

Looking at NewLight's site mindwalker_i Jul 2013 #55

You should talk to their sales engineer caraher Jul 2013 #56

Cool! Yeah, I've been e-mailing Jean as well mindwalker_i Jul 2013 #57

a factoid caraher Jul 2013 #58

2000/milliwatt is really good mindwalker_i Jul 2013 #59

Since you're an electronics person... caraher Jul 2013 #60

I've worked with LabView before mindwalker_i Jul 2013 #61

I think that's right caraher Jul 2013 #62

One more thought... caraher Jul 2013 #68

Interesting! This just further solidifies my determination mindwalker_i Jul 2013 #69

The link to Chapter 4 of "this dissertation" does not work for me mindwalker_i Jul 2013 #63

The link is to the full dissertation caraher Jul 2013 #64

I found a much better piece caraher Jul 2013 #65

That workd, thanks again!!! mindwalker_i Jul 2013 #66

OK, but see my other post caraher Jul 2013 #67

Have you checked the fuses? Eddie Haskell Jul 2013 #51

Uhm, what? mindwalker_i Jul 2013 #52

My intuition tells me the past and the future are rather symmetrical about any local present. hunter May 2014 #75

Thank you! I'm a bit surprised at the attention it's gotten as of late mindwalker_i May 2014 #76

You should definitely read the Ellerman paper posted upthread caraher May 2014 #78

Fascinating read. drm604 May 2014 #83

Thank you for your interest mindwalker_i May 2014 #84

To be clear, I wasn't suggesting that you are a quack, you obviously have some knowledge. drm604 May 2014 #85

Oh I didn't think you were saying I was a quack mindwalker_i May 2014 #86

I haven't programmed at the hardware level in decades. drm604 May 2014 #87

Oh now you've done it mindwalker_i May 2014 #88

Maybe it can break locally. drm604 May 2014 #89

entanglement project mindwalker xoliver May 2015 #90

entanglement project mindwalker_i May 2015 #92