Abstract
Scaling-up optical quantum technologies requires a combination of highly efficient multi-photon sources and integrated waveguide components. Here, we interface these scalable platforms, demonstrating high-rate three-photon interference with a quantum dot based multi-photon source and a reconfigurable photonic chip on glass. We actively demultiplex the temporal train of single photons obtained from a quantum emitter to generate a 3.8×103 s−1three-photon source, which is then sent to the input of a tunable tritter circuit, demonstrating the on-chip quantum interference of three indistinguishable single photons. We show via pseudo number-resolving photon detection characterizing the output distribution that this first combination of scalable sources and reconfigurable photonic circuits compares favorably in performance with respect to previous implementations. Our detailed loss-budget shows that merging solid-state multi-photon sources and reconfigurable photonic chips could allow 10-photon experiments on chip at ∼40 s−1 rate in a foreseeable future.
Highlights
The development of optical quantum technologies allows for quantum-enhanced metrology, secure quantum communication, and quantum computing and simulation [1,2,3] in highly-increased dimensions
Pseudo number-resolving photon detection characterising the output distribution shows that this first combination of scalable sources and reconfigurable photonic circuits compares favourably in performance with respect to previous implementations
A detailed loss-budget shows that merging solid-state based multi-photon sources and reconfigurable photonic chips could allow ten-photon experiments on chip at ∼40 Hz rate in a foreseeable future
Summary
The development of optical quantum technologies allows for quantum-enhanced metrology, secure quantum communication, and quantum computing and simulation [1,2,3] in highly-increased dimensions. The brightness already exceeds by more than one order of magnitude that of heralded sources of the same quality and near-deterministic sources could be reached with a similar technology and modified excitation scheme [14] This new generation of sources has allowed multiphoton experiments such as Boson Sampling [15, 16] involving up to five detected single-photons [17]. A scalable photonic platform should instead provide photon routing and control in low-loss, integrated, and reconfigurable chips These devices have been developed using various materials, such as silicon [18,19,20], silicon nitride [21], lithium niobate [22, 23], or glass [24,25,26].
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