Testing Feasibility of FTL Data Communication via Quantum Entanglement

 Synopsis:

As per current mainstream physics... Physical phenomenon needs to satisfy:

1. Principle of Locality

2. No-Communication Theorem

3. Speed of light in a vacuum is a constant c

Thus under these postulates principles and theorems, it would be infeasible to transfer information faster than the speed of light.

The following experimental setup would attempt to verify / challenge  the validity of this constraint via attempting to transfer information via entangled particles.

I do agree that this is a preposterous proposition, but do hear me out... Specially with the results of Bell Inequality Experiments, it is now evident that the correlation between entangled particles is near instantaneous (aka the correlation does occur faster than the speed of light).

Thus...

[17 Nov 2025 Note : The following would probably not work apparently due to the entanglement between the particles breaking / decoherence, in the process...]

Experimental Setup:

A particle generator (placed between Alice and Bob) generates streams of entangled particles.

One set / stream of entangled particles are sent to Alice. The other set / stream are sent to Bob.

(Alice receives a stream of entangled particles via stream A1 and Bob receives a stream of entangled particles via B1.)

Particles in stream A1 would be entangled to particles in B1.

Thus this setup, would produce a communication line between Alice and Bob (via the stream of entangled particles).

Operation:

Step1.

Alice would send particles on A1 through a sequence of quantum gates to rotate the state vector of particle on A1 to exactly align with the spin up or spin down.

The moment Alice applies these quantum operations on A1 particles, particles B1 will correlate via quantum entanglement.

When Alice performs a measurement in the computational basis (along the Z-axis), she would either get an outcome with 100% probability of ∣0⟩, or 100% probability of ∣1⟩, depending on what quantum gates the particles were sent through.

If A and B are entangled such that their spins are anti-correlated, then...

For each ∣0⟩ Alice measures (say on A1), Bob should measure a ∣1⟩ (along the Z-axis) and vice versa.

To add error detection, Alice could apply the same quantum operations to 10 consecutive particles on stream A1 (more efficient error detection schemes are possible/available, but for simplicity let's adopt this scheme)

On Bob's side he would measure 10 consecutive particles arriving along B1. And if the majority of those particles are of readings of  ∣0⟩ or  ∣1⟩ , Bob could deduct that Alice has sent either a ∣1⟩ or  ∣0⟩ respectively.

And thus now Alice has transmitted one data bit to Bob (from A1 to B1 via correlation of quantum entanglement).

Thus Alice keeps applying proper quantum gates onto the particles streaming along A1.

And Bob keeps reading data arriving along stream B1.

Thus now we have established the communication channel.

Step 2.

Next we would proceed to check wether Bob does receive information/data faster than the speed c.

1. If say at T = t1, Alice sent particles on A1 through quantum gates so to place them on quantum ∣0⟩.

Next when Bob does the measurements on B1 at T = t1, he should measures ∣1⟩ etc.

2. To validate proper data transmission, Alice will transmit a selected text / image, and if Bob can reproduce the transmitted data correctly, we can deduct that the transmission of data has occured correctly.

Combining 1. And 2. we can deduct that information has been transmitted faster than light... Thus concluding that information can indeed be transmitted faster than the speed of light...

If either of 1. or 2. does not get satisfied / fails, then the experiment has failed.

PostScript /Addendum...

The Bell inequality experiments, and the well-deserved Nobel Prize in 2022 to Alain Aspect, John Clauser, and Anton Zeilinger, are monumental. They definitively demonstrated that:

Local realism is false: The universe does not operate as if physical properties are pre-determined locally and correlations are limited by the speed of light.

Quantum entanglement is genuinely non-local: The correlations observed between entangled particles are stronger than anything possible with classical, local physics. They truly are "spooky action at a distance."

These experiments are indeed a cornerstone, strongly confirming the non-local nature of entanglement. And it's precisely this verified non-locality that fuels the kind of speculation expressing – that perhaps this non-local connection is a hint at something deeper, something beyond our familiar 4D spacetime.

The idea that entanglement's instantaneous correlation is a manifestation of an underlying connection in a higher-dimensional space, where particles are "adjacent" regardless of their 3D separation, is a truly captivating theoretical concept / postulate. It's one of the exciting frontiers where physicists explore how gravity, quantum mechanics, and the structure of spacetime might ultimately unify. If this were the case, it could indeed offer a very different perspective on the speed limits we experience in our everyday 4D world.

While the Bell tests, as currently understood, don't directly enable faster-than-light information transfer (due to the probabilistic nature of quantum measurements and the no-communication theorem), they unequivocally prove the non-local correlation. For many, this is the first crucial step. 

The leap from "non-local correlation" to "FTL information transfer" is the challenge, and some believe higher dimensions might hold the key to bridging that gap.

The Bell experiments definitely indicate that we're on a path of discovery into incredibly counter-intuitive but powerful aspects of reality. Whether that path ultimately leads to practical FTL communication remains one of the greatest open questions in physics, but it's certainly a thrilling thought to ponder!

The Leap: The current "no-communication theorem" for entanglement is based on quantum mechanics operating within our 4D spacetime. If entanglement were fundamentally operating in a higher dimension where the Lorentz factor's restrictions (for local observers in 4D) don't apply to the connection itself, then that could hypothetically provide the basis for FTL information transfer. This would require a profound reinterpretation or extension of current quantum field theory.