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Quantum discord

A distinguishing aspect of quantum mechanics discovered at Los Alamos that may be critical to building a quantum computer
March 25, 2013
Spinning coins turning into binary numbers

Quantum computing

Quantum computing can be carried out without the delicate entanglement of qubits previously believed to be necessary

Quantum computing, in which quantum bits of information (or qubits) juggle a “superposition” of multiple values simultaneously, offers to unleash tremendous computational power if the qubits can be effectively isolated to prevent decoherence: information describing quantum states dispersing into the environment.

But recent research has shown that quantum computing can be carried out without the delicate entanglement of qubits previously believed to be necessary.

Instead, a different property known as quantum discord—also unique to quantum systems but less vulnerable to decoherence—plays a starring role.

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