AI Article Synopsis
- A new technique enhances the quantum computing capability of cluster states by swapping some traditional projective measurements for generalized quantum measurements (POVMs).
- An experimental demonstration shows that an arbitrary three-qubit cluster computation is successfully executed using a tunable linear-optical POVM and fast active feedforward on a two-qubit photonic cluster state.
- The results reveal a high average output fidelity of 0.9832±0.0002 over 206 computations, with errors from the POVM device and feedforward being notably low, meeting some recent fault-tolerance standards for cluster computing.
Article Abstract
We introduce and implement a technique to extend the quantum computational power of cluster states by replacing some projective measurements with generalized quantum measurements (POVMs). As an experimental demonstration we fully realize an arbitrary three-qubit cluster computation by implementing a tunable linear-optical POVM, as well as fast active feedforward, on a two-qubit photonic cluster state. Over 206 different computations, the average output fidelity is 0.9832+/-0.0002; furthermore the error contribution from our POVM device and feedforward is only of O(10(-3)), less than some recent thresholds for fault-tolerant cluster computing.
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