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Demo of two-qubit fault-tolerant universal holonomic quantum gates...

• https://www.nextbigfuture.com, brian wang

A quantum computer is a powerful machine with the potential to solve complex problems much faster than today's conventional computer can. Researchers are currently working on the next step in quantum computing: building a universal quantum computer.

Although the H, S, T, and CZ gates offer the elementary discrete set required for the universal quantum gates to construct arbitrary unitary quantum gates, the availability of arbitrary phase gates would be beneficial for fast gating in many practical applications, such as quantum Fourier transformation and blind quantum computing. The scheme allows a purely holonomic gate without requiring an energy gap, which would have induced dynamic phase interference to degrade the gate fidelity, and thus enables precise and fast control over long-lived quantum memories for realising quantum repeaters interfacing between universal quantum computers and secure communication networks.

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