Arxiv – Controlled-NOT gate operating with single photons (10 pages) Technology Review – Cambridge physicists have built a quantum logic gate that combines a quantum dot that fires photons with a ...

"For the last several years the Centre for Quantum Photonics has been working towards building controlled-NOT gates and other important quantum circuits on a chip to solve these problems," added ...

A C-NOT logic gate requires two input photons. So the circuit works by zapping the quantum dot twice, generating two photons. These are identical because they’ve come from the same dot.

If you're interested by his research works, please read "An All Optical Fibre Quantum Controlled-NOT Gate." Here are two links to the abstract and to the full paper (PDF format, 4 pages, 779 KB).

CNOT Gate (Controlled-NOT Gate): The CNOT gate is a crucial operation in quantum computing, ... This provides the necessary support for designing complex quantum circuits, ...

Get Instant Summarized Text (Gist) Silicon spin qubits offer long coherence times (up to 0.5 s), high gate fidelities (>99.95% for single-qubit, above fault-tolerant threshold for two-qubit), and ...

Mooij and co-workers created the quantum version of a basic building block of computer logic, called the controlled-not (CNOT) gate, which switches a bit from 0 to 1 or vice versa if a second bit ...