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These plasmas play a fundamental role in the dynamics of ultra-massive astrophysical objects and are believed to be associated with the emission of ultra-bright gamma-ray bursts. Despite extensive theoretical modelling, our knowledge of this state of matter is still speculative, owing to the extreme difficulty in recreating neutral matter\u2013antimatter plasmas in the laboratory. Here we show that, by using a compact laser-driven setup, ion-free electron\u2013positron plasmas with unique characteristics can be produced. Their charge neutrality (same amount of matter and antimatter), high-density and small divergence finally open up the possibility of studying electron\u2013positron plasmas in controlled laboratory experiments.<\/jats:p>","DOI":"10.1038\/ncomms7747","type":"journal-article","created":{"date-parts":[[2015,4,23]],"date-time":"2015-04-23T11:35:47Z","timestamp":1429788947000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":323,"title":["Generation of neutral and high-density electron\u2013positron pair plasmas in the laboratory"],"prefix":"10.1038","volume":"6","author":[{"given":"G.","family":"Sarri","sequence":"first","affiliation":[]},{"given":"K.","family":"Poder","sequence":"additional","affiliation":[]},{"given":"J. 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