The American Motors Corporation was formed when the Nash-Kelvinator Corporation and the Hudson Motor Car Company merged in 1954. New cars with AMC badges...
As world leaders return home from the 2022 United Nations Climate Change Conference (COP27), an annual international climate meeting that was held in Egypt...
In a number of solid-state systems, the quantum Hall effect (QHE) is found to demonstrate topologically protected dissipation less edge channels with their transversal...
The construction industry is a major contributor to climate change, accounting for 20 percent of global emissions. The problem is set to grow: Square...
Few communities in Southern California have been more successful at saying “no” to large new developments over the last decade than Redondo Beach.The South...
One thing the pandemic has made clear, many experts say, is that families with young children need more support than they’re getting. The shuttering of ...
How can a multipartite single-photon path-entangled state be certified efficiently by means of local measurements? We address this question by constructing an entanglement witness based on local photon detections preceded by displacement operations to reveal genuine multipartite entanglement. Our witness is defined as a sum of three observables that can be measured locally and assessed with two measurement settings for any number of parties $N$. For any bipartition, the maximum mean value of the witness observable over biseparable states is bounded by the maximum eigenvalue of an $Ntimes N$ matrix, which can be computed efficiently. We demonstrate the applicability of our scheme by experimentally testing the witness for heralded 4- and 8-partite single-photon path-entangled states. Our implementation shows the scalability of our witness and opens the door for distributing photonic multipartite entanglement in quantum networks at high rates.
British Airways has made this announcement: British Airways has raised over £898,000 for Red Nose Day this year, bringing their total funds to over £26 million for Flying Start, through its global charity partnership with Comic Relief that first began in 2010. This is thanks to the generosity of its customers who have donated on […]
