var pgAd = ''; pgAd += "<"+"script src=\"https://www.googletagservices.com/tag/js/gpt.js\">googletag.pubads().definePassback(\"/149443272/193716792\", [728, 90]).setTargeting(\"pgpro\", \"12\").setTargeting(\"pgpid\", \"10.1038%2Fs41586-019-1666-5\").setTargeting(\"pgiid\", \"15719119397237215902701102101038s4158601916665\").setTargeting(\"pgzid\", \"102\").setTargeting(\"pgpub\", \"14\").setTargeting(\"pgscrh\", 1200).setTargeting(\"pgscrw\", 1920).setTargeting(\"pgtrgtype\", \"content\").setTargeting(\"pgtrgtime\", \"1571911939721\").setTargeting(\"pgjour\", \"Nature\").setTargeting(\"pgpubadunit\", \"/270604982/nature/nature/articles\").setTargeting(\"pgpubparam\", \"%7B%22articleid%22%3A%5B%22s41586-019-1666-5%22%5D%2C%22bpid%22%3A%5B%223000097121%22%2C%223000091117%22%2C%223000096626%22%2C%223001710341%22%5D%2C%22collectionid%22%3A%5B%22false%22%5D%2C%22doi%22%3A%5B%2210.1038%2Fs41586-019-1666-5%22%5D%2C%22kwrd%22%3A%5B%22Quantum%20information%22%2C%22Quantum%20physics%22%5D%2C%22logged%22%3A%5B%22n%22%5D%2C%22pos%22%3A%5B%22LB1%22%5D%2C%22subjmeta%22%3A%5B%22481%22%2C%22483%22%2C%22639%22%2C%22766%22%5D%2C%22techmeta%22%3A%5B%22119%22%2C%22120%22%2C%22129%22%5D%2C%22tile%22%3A%5B%221%22%5D%2C%22type%22%3A%5B%22article%22%5D%7D\").display();<"+"/script>\n"; document.write(pgAd);