{"id":314039,"date":"2018-11-06T17:09:11","date_gmt":"2018-11-07T01:09:11","guid":{"rendered":"https:\/\/www.microsoft.com\/en-us\/research\/?post_type=msr-research-item&#038;p=314039"},"modified":"2018-11-06T17:09:11","modified_gmt":"2018-11-07T01:09:11","slug":"comment-probabilistic-quantum-memories","status":"publish","type":"msr-research-item","link":"https:\/\/www.microsoft.com\/en-us\/research\/publication\/comment-probabilistic-quantum-memories\/","title":{"rendered":"Comment on &#8220;Probabilistic Quantum Memories&#8221;"},"content":{"rendered":"<p><span style=\"font-family: Palatino Linotype;\">This is a comment on two wrong Phys. Rev. Letters papers by C.A. Trugenberger. Trugenberger claimed that quantum registers could be used as exponentially large &#8220;associative&#8221; memories. We show that his scheme is no better than one where the quantum register is replaced with a classical one of equal size. We also point out that the Holevo bound and more recent bounds on &#8220;quantum random access codes&#8221; pretty much rule out powerful memories (for classical information) based on quantum states. <\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>This is a comment on two wrong Phys. Rev. Letters papers by C.A. Trugenberger. Trugenberger claimed that quantum registers could be used as exponentially large &#8220;associative&#8221; memories. We show that his scheme is no better than one where the quantum register is replaced with a classical one of equal size. We also point out that [&hellip;]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"msr-url-field":"","msr-podcast-episode":"","msrModifiedDate":"","msrModifiedDateEnabled":false,"ep_exclude_from_search":false,"_classifai_error":"","msr-author-ordering":null,"msr_publishername":"","msr_publisher_other":"","msr_booktitle":"","msr_chapter":"","msr_edition":"Physical Review Letters","msr_editors":"","msr_how_published":"","msr_isbn":"","msr_issue":"","msr_journal":"Phys. Rev. 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