Quantum Repeaters: What an Architect Needs to Know Before the Sales Call
A quantum repeater is not an amplifier. It is a machine that manufactures entanglement in segments and stitches them together. Here is how it…
Entanglement-as-a-Service: What Is Actually Being Sold
Entanglement can be delivered on demand, but it cannot be copied, amplified, or stored for long. Here is what an EaaS offer contains and…
What a Quantum Network Is Actually For
A quantum network does not carry your traffic. It produces a narrow set of outputs, and knowing exactly what those are is the difference…
Where Trust Sits in a Quantum Network
Quantum key distribution moves the trust boundary rather than removing it. A working guide to trusted nodes, device-level attacks, and the questions to ask…
Distributing Entanglement Across a Network: A Design-Level Guide
Loss, fidelity, and memory coherence set the shape of every quantum network. A working guide to direct transmission, entanglement swapping, and purification, with the…
Quantum Teleportation, Precisely
Teleportation is a fully specified protocol with a fixed cost: one entangled pair, one joint measurement, two classical bits. Here is what it does…
Correlations Without a Mechanism
Two qubits agree with certainty across any distance, and no message travels. Entanglement defined honestly, plus the 120-degree test gloves fail.
Entanglement-Based QKD: How E91 and BBM92 Actually Work
E91 and BBM92 both distribute entangled photon pairs, but they verify security in completely different ways. That difference decides what you have to trust.
BB84 Explained: How Quantum Key Distribution Actually Works
Bennett and Brassard's 1984 protocol turns key distribution into a physics problem. Here is the mechanism, the eavesdropper maths, and the four things BB84…