LEDs may put lasers out of quantum computing business

Quantum computers scarcely exist yet, but scientists have already begun working on shrinking them down by creating smaller components. A group of researchers have devised a way to use an LED to generate the entangled photon pairs needed for quantum teleportation, computing, and encryption. While the LED is not quite as reliable as lasers, its smaller footprint should help make quantum applications a bit more practical.

Quantum Clock Based on Aluminum Ion

Physicists at the National Institute of Standards and Technology (NIST) have built an enhanced version of an experimental atomic clock based on a single aluminum atom that is now the world’s most precise clock, more than twice as precise as the previous pacesetter based on a mercury atom.

The new aluminum clock would neither gain nor lose one second in about 3.7 billion years, according to measurements to be reported in Physical Review Letters.*

The new clock is the second version of NIST’s “quantum logic clock,” so called because it borrows the logical processing used for atoms storing

A tale of two qubits: how quantum computers work

Quantum information is the physics of knowledge. To be more specific, the field of quantum information studies the implications that quantum mechanics has on the fundamental nature of information. By studying this relationship between quantum theory and information, it is possible to design a new type of computer—a quantum computer.

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