Quantum Reality Lab Experiments & evidence

Research investigations · 5

A headline is a starting point.
Make it an investigation.

Ask a question. Make a prediction. Compare exact theory with finite samples—and see where the model stops.

Conceptual analogue · small-system teaching model

Can an invisible phase change the result?

Follow two abstract paths as they split, acquire a relative phase, and recombine.

  1. 1Predict
  2. 2Ideal
  3. 3Ideal Shots
  4. 4Hardware
  5. 5Interpret
  6. 6Lab note
Your prediction
Follow the amplitude

Prepare

  1. |0⟩Prepare
  2. HSplit
  3. P(φ)Phase
  4. HMix

Begin with one definite outcome. The next H gate creates two amplitudes.

Arrows occupy complex amplitude space, not physical space. This panel always shows ideal theory; finite-shot evidence stays in the probability chart.

Connect the picture to the equation

H|0⟩ = (|0⟩ + |1⟩)/√2

H creates two equal amplitudes.

Amplitude arrows · length squared gives probability; angle is phase. These are abstract paths, not physical trajectories.
ReIm|0⟩1.000 magnitude
ReIm|1⟩0.000 magnitude

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Exact circuit probabilities

Theoretical probabilities for the selected step and basis.

Exact numerical values
Ideal probabilities at Prepare |0⟩
OutcomeProbability
01.0000000
10.0000000

Fixed 0–100% scale · left digit is qubit 0

Z-basis measurement probabilities. A histogram is not the complete quantum state.

What this shows

Prepare |0⟩

A relative phase can be hidden in a Z-basis histogram, yet change later interference. After H–P(φ)–H, P(0) = cos²(φ/2). A shared global phase has no effect on these probabilities.

Where this model stops

This gate circuit is an analogue of phase interference. It does not simulate magnetic flux, dynamical gauge fields, Gauss’s law or the oscillators in the research experiment.

Real QPU eligibility and source paper

Gate-circuit export uses H and P. No authentic QPU sample is attached to this model; hardware execution and target transpilation have not been validated.

There is no hardware execution behind these plots. Exporting a circuit does not validate a device or create a new hardware result.

Saner et al. · Aharonov–Bohm interference in a Z₂ lattice gauge theory ↗

Nature Physics · September 25, 2026; preprint July 25, 2025

Predict · 1 of 6

Inspect the circuit

Export the selected step and settings for Qiskit. No job is submitted.

View Qiskit code
# Quantum Reality Lab — Phase becomes interference
# Conceptual analogue; not a reproduction of the cited hardware experiment.
# Source: https://doi.org/10.1038/s41567-026-03400-6
# Display convention: qubit 0 is the leftmost display digit.
# Qiskit single-register count keys are reversed before display.
from qiskit import QuantumCircuit, QuantumRegister, ClassicalRegister
from math import pi

qc = QuantumCircuit(1, 1)
qc.measure(range(qc.num_qubits), range(qc.num_clbits))

print(qc.draw())