Quantum Computing Tutorials

The E91 protocol, also known as the Ekert91 protocol, is a quantum key distribution (QKD) protocol proposed by Artur Ekert in 1991. Unlike the...

The B92 protocol is a quantum key distribution (QKD) protocol developed by Charles Bennett in 1992 as a simpler alternative to the earlier BB84...

The No-Cloning Theorem is one of the most important ideas in quantum physics. It also has big effects on quantum computing and quantum information...

The Heisenberg Uncertainty Principle is one of the most important ideas in quantum mechanics. It says that you can only know certain pairs of...

Charles Bennett and Gilles Brassard came up with the BB84 protocol in 1984. It is one of the most important quantum key distribution (QKD)...

Quantum Key Distribution (QKD) is a new and revolutionary way to encrypt messages. It uses quantum physics to create a secret key that only...

A field using the ideas of quantum mechanics to attain secure communication is quantum cryptography. Whereas traditional encryption depends on the computational challenge of...

The Quantum Threshold Theorem is a fundamental result in the theory of fault-tolerant quantum computation. It essentially states that if the error rate of...

In quantum computing, fault tolerant quantum computation is the capacity of a quantum computer to execute accurate computations even in the presence of faults....

Several Quantum Error Correcting Codes (QECC) have been developed, each with different properties and capabilities: Three-Qubit Codes Three-qubit codes are fundamental examples of quantum error-correcting codes...