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10.1038/ncomms15043 http://scihub22266oqcxt.onion/10.1038/ncomms15043 C5414096!5414096!28443624     free     free     free Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534       Nat+Commun 2017 ; 8 (ä): ä Nephropedia Template TP {{tp|p=28443624|t=2017. Fundamental limits of repeaterless quantum communications |pdf=|usr=}}{{28443624}} gab.com Text Fundamental limits of repeaterless quantum communications JO: Nat Commun http://www.kidney.de/pget.php?&tw=1&pmid=28443624 #FOAvip Quantum communications promises reliable transmission of quantum information, efficient distribution of entanglement and generation of completely secure keys. For all these tasks, we need to determine the optimal point-to-point rates that are achievable by two remote parties at the ends of a quantum channel, without restrictions on their local operations and classical communication, which can be unlimited and two-way. These two-way assisted capacities represent the ultimate rates that are reachable without quantum repeaters. Here, by constructing an upper bound based on the relative entropy of entanglement and devising a dimension-independent technique dubbed ?teleportation stretching', we establish these capacities for many fundamental channels, namely bosonic lossy channels, quantum-limited amplifiers, dephasing and erasure channels in arbitrary dimension. In particular, we exactly determine the fundamental rate-loss tradeoff affecting any protocol of quantum key distribution. Our findings set the limits of point-to-point quantum communications and provide precise and general benchmarks for quantum repeaters. Twit Text FOAVip Fundamental limits of repeaterless quantum communications ????Nat Commun http://www.kidney.de/pget.php?&tw=1&pmid=28443624 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=28443624 #FOAvip English Wikipedia <ref>{{Cite pmid|28443624}}</ref> Fundamental limits of repeaterless quantum communications #MMPMID28443624 Pirandola S; Laurenza R; Ottaviani C; Banchi L Nat Commun 2017[]; 8 (ä): ä PMID28443624show ga Quantum communications promises reliable transmission of quantum information, efficient distribution of entanglement and generation of completely secure keys. For all these tasks, we need to determine the optimal point-to-point rates that are achievable by two remote parties at the ends of a quantum channel, without restrictions on their local operations and classical communication, which can be unlimited and two-way. These two-way assisted capacities represent the ultimate rates that are reachable without quantum repeaters. Here, by constructing an upper bound based on the relative entropy of entanglement and devising a dimension-independent technique dubbed ?teleportation stretching', we establish these capacities for many fundamental channels, namely bosonic lossy channels, quantum-limited amplifiers, dephasing and erasure channels in arbitrary dimension. In particular, we exactly determine the fundamental rate-loss tradeoff affecting any protocol of quantum key distribution. Our findings set the limits of point-to-point quantum communications and provide precise and general benchmarks for quantum repeaters. äFundamental limits of repeaterless quantum communications (epmc).pdf DeepDyve Pubget Overpricing