{"paper":{"title":"Dynamical control of qubit coherence: Random versus deterministic schemes","arxiv_id":"quant-ph/0511121","primary_cat":"quant-ph","submitted_at":"2005-11-12T19:52:11+00:00","version_compiled":"v1"},"notice":"Every quoted sentence is the authors' text from the arXiv listing abstract. Labels and probabilities are the outputs of classifier-1.13.0 on the question bank abstract-p1-20260923, exactly as returned. No sentence in this record was written by a language model.","schema":"pith.compiled-record/v0","status":"compiled","abstract":{"source":"arXiv listing abstract v1","sentences":[{"i":0,"p":0.92,"id":"s0","own":false,"role":"background","text":"We revisit the problem of switching off unwanted phase evolution and decoherence in a single two-state quantum system in the light of recent results on random dynamical decoupling methods [L. Viola and E.","hedge":{"p":0.6,"label":"unclear"},"own_p":0.2,"main_claim_p":0.02,"quantitative":false,"quantitative_p":0.05,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.0,"background":0.92,"limitation":0.0,"future_work":0.0,"contribution":0.08,"interpretation":0.0}},{"i":1,"p":1.0,"id":"s1","own":false,"role":"background","text":"Knill, Phys. Rev. Lett. {\\bf 94}, 060502 (2005)].","hedge":{"p":0.98,"label":"unclear"},"own_p":0.03,"main_claim_p":0.01,"quantitative":true,"quantitative_p":0.51,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.0,"background":1.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.0}},{"i":2,"p":0.76,"id":"s2","own":true,"role":"method","text":"A systematic comparison with standard cyclic decoupling is effected for a variety of dynamical regimes, including the case of both semiclassical and fully quantum decoherence models.","hedge":{"p":0.96,"label":"asserted"},"own_p":0.87,"main_claim_p":0.04,"quantitative":false,"quantitative_p":0.19,"role_probabilities":{"gap":0.0,"method":0.76,"result":0.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.24,"interpretation":0.0}},{"i":3,"p":0.51,"id":"s3","own":true,"role":"result","text":"In particular, exact analytical expressions are derived for randomized control of decoherence from a bosonic environment.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.93,"main_claim_p":0.06,"quantitative":false,"quantitative_p":0.05,"role_probabilities":{"gap":0.0,"method":0.06,"result":0.51,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.43,"interpretation":0.0}},{"i":4,"p":0.81,"id":"s4","own":true,"role":"contribution","text":"We investigate quantitatively control protocols based on purely deterministic, purely random, as well as hybrid design, and identify their relative merits and weaknesses at improving system performance.","hedge":{"p":0.95,"label":"asserted"},"own_p":0.94,"main_claim_p":0.09,"quantitative":false,"quantitative_p":0.21,"role_probabilities":{"gap":0.0,"method":0.19,"result":0.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.81,"interpretation":0.0}},{"i":5,"p":0.99,"id":"s5","own":true,"role":"result","text":"We find that for time-independent systems, hybrid protocols tend to perform better than pure random and may improve 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