3 research outputs found
Timing jitter removers of photon detectors
Among various performances of photon detectors, the timing jitter is
difficult to improve because of its trade-offs with other important
performances such as detection efficiency. Such trade-offs have been an issue
in applications, especially for high-purity non-Gaussian-state generation
necessary in optical quantum computation. Here, we introduce a method using an
external fast optical switch -- Timing Jitter Remover (TJR) -- whose time
window limits the photon-detectable time of photon detectors and improve the
timing jitter without sacrificing other performances. By using a TJR, we
experimentally improve the timing jitter of a photon-number-resolving detector
based on a transition edge sensor, from 50 ns to 10 ns. Using this improved
detector, we generate one of important non-Gaussian states, a Schr\"{o}dinger
cat state with Wigner negativity of -0.01, which cannot be observed without
TJRs. TJRs would be the key technology for the realization of ultra-fast,
fault-tolerant, universal optical quantum computer.Comment: 26 pages, 6 figure