Error-correcting entanglement swapping using a practical logical photon encoding

• URL: http://arxiv.org/abs/2101.11082v4
• Date: Fri, 10 Sep 2021 11:46:12 GMT
• Title: Error-correcting entanglement swapping using a practical logical photon encoding
• Authors: Paul Hilaire, Edwin Barnes, Sophia E. Economou, Fr\'ed\'eric Grosshans
• Abstract summary: Quantum networks, modular and fusion-based quantum computing rely crucially on the ability to perform photonic Bell state measurements. Here, we develop protocols that overcome these two key challenges through logical encoding of photonic qubits. Our approach uses a tree graph state logical encoding, which can be produced deterministically with a few quantum emitters, and achieves near-deterministic photonic Bell state measurements while also protecting against errors including photon losses, with a record loss-tolerance threshold.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Several emerging quantum technologies, including quantum networks, modular and fusion-based quantum computing, rely crucially on the ability to perform photonic Bell state measurements. Therefore, photon losses and the 50\% success probablity upper bound of Bell state measurements pose a critical limitation to photonic quantum technologies. Here, we develop protocols that overcome these two key challenges through logical encoding of photonic qubits. Our approach uses a tree graph state logical encoding, which can be produced deterministically with a few quantum emitters, and achieves near-deterministic logical photonic Bell state measurements while also protecting against errors including photon losses, with a record loss-tolerance threshold.

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