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 network analogue · small-system teaching model

Where is the entanglement after storage?

Transfer a Bell pair from communication qubits to memories at two labeled nodes.

  1. 1Predict
  2. 2Ideal
  3. 3Ideal Shots
  4. 4Hardware
  5. 5Interpret
  6. 6Lab note
Your prediction
Register map · one assumed Bell resource, transferred locally

Node A

q0Communication
Local SWAP ↓
q1Memory

Node B

q2Communication
Local SWAP ↓
q3Memory
XX 0.000YY 0.000ZZ 1.000

Memory-pair Bell overlap 0.500 in this exact model.

The current memory-pair evidence does not establish a witness above 1/2. This is not measured network performance.

XX means measuring both memories along X and averaging agreement (+1) versus disagreement (−1). YY and ZZ ask the corresponding questions along Y and Z.

Checking voice availability…

Exact circuit probabilities

Theoretical probabilities for the selected step and basis.

Exact numerical values
Ideal probabilities at Prepare four qubits
OutcomeProbability
00001.0000000
00010.0000000
00100.0000000
00110.0000000
01000.0000000
01010.0000000
01100.0000000
01110.0000000
10000.0000000
10010.0000000
10100.0000000
10110.0000000
11000.0000000
11010.0000000
11100.0000000
11110.0000000

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

q1 and q3 are measured in Z; q0 and q2 in Z. A histogram is not the complete quantum state.

What this shows

Prepare four qubits

Local SWAPs move the correlations into memory qubits q1 and q3. The communication qubits return to |0⟩. XX, YY and ZZ measurements together give the Bell projector overlap F = (1 + XX − YY + ZZ)/4; F > 1/2 is an entanglement witness for this pair.

Where this model stops

The link is an assumed Bell resource, not a simulation of fiber, heralding or mixed ion species. Ideal storage has no decay. This cannot reproduce the reported ten-second lifetime. A single-chip gate circuit is not a remote network.

Real QPU eligibility and source paper

H, CX and SWAP describe an on-chip analogue. No remote networking or memory lifetime is demonstrated, and no QPU data is attached.

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

Main et al. · Multipartite Mixed-Species Entanglement over a Quantum Network ↗

PRL · October 13, 2026; preprint June 17, 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 — Move entanglement into memory
# Conceptual network analogue; not a reproduction of the cited hardware experiment.
# Source: https://arxiv.org/abs/2506.14334
# 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(4, 4)
# q0=A communication, q1=A memory, q2=B communication, q3=B memory
# Memory measurement basis: ZZ; communication qubits measured in Z.
qc.measure(range(qc.num_qubits), range(qc.num_clbits))

print(qc.draw())