A new study demonstrates a quantum communication system that can deliver secure transmissions in faster and more secure ways. In quantum cryptography, unconditional security—where security of a transmitted message is not dependent on the device that interprets this message—presents a puzzle to scientists whose aim is to design a safe quantum key distribution (QKD) system. In the […]
Tag: quantum computing
Multicoloured photons springboard information storage into a quantum leap 
Researchers demonstrate how light particles—photons—can become a powerful quantum resource when generated on a photonic chip in the form of colour-entangled quDits. Unlike a qubit, which is a mechanical system with only two states (the classic example being 0 and 1), quDits can have multiple quantum states: for example, a high-dimensional photon can be red and yellow and green and blue […]
Could graphene help power quantum computers?
Researchers have found experimental evidence of strange quasiparticles in graphene that could be used as qubits, the bits of information processed by quantum computers. Graphene is a single-atom-thick lattice of carbon, but when two layers are sandwiched together and subjected to a magnetic field, strange entities can exist at the interface. Unlike the 3D world […]
