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Entangling logical qubits with lattice surgery

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arxiv 2006.03071 v1 pith:BGNPCL77 submitted 2020-06-04 quant-ph

Alexander Erhard , Hendrik Poulsen Nautrup , Michael Meth , Lukas Postler , Roman Stricker , Martin Ringbauer , Philipp Schindler , Hans J. Briegel
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Rainer Blatt Nicolai Friis Thomas Monz
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keywords logicalqubitslatticequantumsurgerycorrectionencodedentangling
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Future quantum computers will require quantum error correction for faithful operation. The correction capabilities come with an overhead for performing fault-tolerant logical operations on the encoded qubits. One of the most resource efficient ways to implement logical operations is lattice surgery, where groups of physical qubits, arranged on lattices, can be merged and split to realize entangling gates and teleport logical information. Here, we report on the experimental realization of lattice surgery between two topologically encoded qubits in a 10-qubit ion trap quantum information processor. In particular, we demonstrate entanglement between two logical qubits and we implement logical state teleportation.

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  1. Genuine Multipartite Entanglement between Logical Qubits via Cross-Code Lattice Surgery

    quant-ph 2026-07 accept novelty 7.5 of 10

    Cross-code lattice surgery between surface and 3D colour codes yields certified logical GHZ and |CCZ> GME plus arbitrary logical rotations on a trapped-ion processor.

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