Quantum Entanglement Random Number Generator Experiment using Arduino and Python (ft. Fractals!)

Here I make a long overdue demonstration of a setup that I have been working with on and off for a long time - A Compact Quantum Entanglement Source for use in, among other things random number generation for use in encryption, simulation and as a "probe" of the most pure, irreducible form of randomness itself.

Using a non-linear crystal made of Beta-Barium Borate (BBO) I am able to generate 2 entangled photon beams of wavelength 810nm each from a pump laser beam of 405nm which is pulsed using the Arduino and directed into the splitter. the entangled photons are in quantum superposition of the H and V modes, with the indeterminacy being a perfect 50/50 split.

These are directed by beamsplitters into 2 detectors which either detect a H or V mode but never both. Whichever silicon phototransistor sensor on the arduino detects the H and which detects the V mode is purely random creating a random number source that is irreducible and thus unhackable. The random numbers generated by this scheme are a stream of integer bits. To generate purely random non-integers I use a CCD and a split mirror that directs the 2 photons into an aperture of a connected CCD microscope sensor.

By splitting the image were the 2 beams of entangled photons meet and correlating the 2 images to detect random changes we can assume due to the nature of entanglement that the difference between the images must be in part due to the random fluctuations of the vacuum as the 2 entangled photons when cross-correlated should be equal but of opposite polarization. the randomness is beneath the intrinsic shot noise of the CCD sensor as quantum entangled photon streams generated in such a scheme allow for sub-shot noise imaging in holography setups.

A python code for generating cross-correlated images is also available to use in this repository however it requires time to correlate across all the pixel data. this can be used as a way to produce sub-shot noise images using standard CCD microscope cameras in such a setup.

I hope, with future improvements and optimizations to this setup to incorporate an ethernet shield to the arduino and to share the random numbers generated in pulses on a webpage that can be viewed freely for use in open-source experimentation using quantum random numbers.

[realcygnus]

Nifty getup ! I just got a USB true RNGs to play around with myself.

[alditascheplastick]

Hey i am trying to build this setup by my own, thanks for providing all the information.

[truongle]

Dear Muon Ray,

great idea, great setup. Thank You!!

However, I'm still unsure about:

1. how do the photons of V-Mode manage to reach the A0-pin. And how do the photons of H-mode reach A1-pin? Is this the job of the non-linear crystal? Or do you need some additional H-filter, and V-filter?

2. what is the real function of the beam splitter (the cube)? Is this just to split the photons for the fotoresistor and for the ccd camera?

3. what is the function of the splitter attached to the CCD sensor? Is it to reflect the photons that are not passing the beam splitter on the CCD sensor?

Maybe you could supplement a schematic visualization of your set up and make a part list. I really want to re-build this experiment setup.

Thank you so much for sharing this great work!!

[birdman]

Great video! What I don't understand about particle entanglement is how you correlate them. Also, for electrons for example with shared spin state, do they share a single wave function?

[danielpetka]

Do you think it would make sense to use a higher power violet laser? Like 500mW-900mW.. or could it damage the crystal? It shouldn't be affected much if it's transparent but I'm not sure it will still work at 410nm or so (the wavelength of diode lasers shifts with heat)

[jim]

Is there a way to create a measurable change in entangled atoms? For example, I see the atoms repeating a 1 but through an interaction, I changed it to represent a 0.

[MuonRay]

Here I make a long overdue demonstration of a setup that I have been working with on and off for a long time - A Compact Quantum Entanglement Source for use in, among other things random number generation for use in encryption, simulation and as a "probe" of the most pure, irreducible form of randomness itself.

Using a non-linear crystal made of Beta-Barium Borate (BBO) I am able to generate 2 entangled photon beams of wavelength 810nm each from a pump laser beam of 405nm which is pulsed using the Arduino and directed into the splitter. the entangled photons are in quantum superposition of the H and V modes, with the indeterminacy being a perfect 50/50 split.

These are directed by beamsplitters into 2 detectors which either detect a H or V mode but never both. Whichever silicon phototransistor sensor on the arduino detects the H and which detects the V mode is purely random creating a random number source that is irreducible and thus unhackable. The random numbers generated by this scheme are a stream of integer bits. To generate purely random non-integers I use a CCD and a split mirror that directs the 2 photons into an aperture of a connected CCD microscope sensor.

By splitting the image were the 2 beams of entangled photons meet and correlating the 2 images to detect random changes we can assume due to the nature of entanglement that the difference between the images must be in part due to the random fluctuations of the vacuum as the 2 entangled photons when cross-correlated should be equal but of opposite polarization. the randomness is beneath the intrinsic shot noise of the CCD sensor as quantum entangled photon streams generated in such a scheme allow for sub-shot noise imaging in holography setups.

A python code for generating cross-correlated images is also available to use in this repository however it requires time to correlate across all the pixel data. this can be used as a way to produce sub-shot noise images using standard CCD microscope cameras in such a setup.

I hope, with future improvements and optimizations to this setup to incorporate an ethernet shield to the arduino and to share the random numbers generated in pulses on a webpage that can be viewed freely for use in open-source experimentation using quantum random numbers.

[carlono]

26:00 That’s a stereoscopic adapter for cameras, isn’t it?