Photon distillation with reduced resource costs for fault-tolerant quantum computation

Description

Photon distillation is a protocol to create a single photon with reduced error out of multiple imperfect photons, via multiphoton interference and heralding. We introduce a version of this protocol with substantially reduced resource costs, which succeeds at constant probability irrespective of the required error reduction, making it suitable for use in photonic quantum computers. We achieve our results by combining the theory of multiphoton interference in linear networks with the zero-transmission law for linear-optical networks with an internal symmetry. We provide evidence that photon distillation has a higher threshold for distinguishability errors than conventional QEC, and that photon distillation plus QEC outperforms bare QEC in resource costs at constant error reduction. Our results point to the suitability of photon distillation as a protocol for large-scale quantum computation.

Period	30 Jan 2025
Event title	SPIE Photonics West 2025
Event type	Conference
Location	San Francisco, United States, CaliforniaShow on map
Degree of Recognition	International