Peter Barrow

TL;DR: In this article, the authors construct an extended Wigner's friend scenario with four observers and experimentally violate the associated Bell-type inequality by five standard deviations, which implies that quantum theory should be interpreted in an observer-dependent way.

TL;DR: In this article, a domain-engineering technique for tailoring the nonlinearity of a parametric down-conversion crystal was proposed to generate indistinguishable and spectrally pure photons without filtering.

TL;DR: This work demonstrates quantum conference key agreement, a cryptography protocol leveraging multipartite entanglement to efficiently create identical keys between N users with up to N-1 rate advantage in constrained networks, and highlights a previously unexplored protocol tailored for multinode networks leveraging low-noise, long-distance transmission of GHZ states.

TL;DR: This work demonstrates a technique for direct generation of entangled TFM-encoded states in single-pass, tailored down-conversion processes, achieving unprecedented quality in state generation-high rates, heralding efficiency, and state fidelity-as characterized via highly resolved time-of-flight fiber spectroscopy and two-photon interference.

TL;DR: In this paper, the authors constructed an extended Wigner's friend scenario with four observers that allows them to put it to the test and experimentally violate the associated Bell-type inequality by 5 standard deviations.