▁systems ▁of ▁equations , ▁or ▁" H HL ▁Algorithm ", ▁named ▁after ▁its ▁discover ers ▁H arrow , ▁Hass id im , ▁and ▁Lloyd , ▁is ▁expected ▁to ▁provide ▁speed up ▁over ▁classical ▁counter parts . ▁ ▁Quant um ▁supre m acy ▁▁ ▁John ▁Pres kill ▁has ▁introduced ▁the ▁term ▁quantum ▁supre m acy ▁to ▁refer ▁to ▁the ▁hypoth et ical ▁speed up ▁advantage ▁that ▁a ▁quantum ▁computer ▁would ▁have ▁over ▁a ▁classical ▁computer ▁in ▁a ▁certain ▁field . ▁Google ▁announced ▁in ▁ 2 0 1 7 ▁that ▁it ▁expected ▁to ▁achieve ▁quantum ▁supre m acy ▁by ▁the ▁end ▁of ▁the ▁year ▁though ▁that ▁did ▁not ▁happen . ▁IBM ▁said ▁in ▁ 2 0 1 8 ▁that ▁the ▁best ▁classical ▁computers ▁will ▁be ▁be aten ▁on ▁some ▁practical ▁task ▁within ▁about ▁five ▁years ▁and ▁views ▁the ▁quantum ▁supre m acy ▁test ▁only ▁as ▁a ▁potential ▁future ▁benchmark . ▁Although ▁ske pt ics ▁like ▁Gil ▁Kal ai ▁doubt ▁that ▁quantum ▁supre m acy ▁will ▁ever ▁be ▁achieved , ▁in ▁October ▁ 2 0 1 9 , ▁a ▁Sy cam ore ▁processor ▁created ▁in ▁conj unction ▁with ▁Google ▁A I ▁Quant um ▁was ▁reported ▁to ▁have ▁achieved ▁quantum ▁supre m acy , ▁with ▁calculations ▁more ▁than ▁ 3 , 0 0 0 , 0 0 0 ▁times ▁as ▁fast ▁as ▁those ▁of ▁Sum mit , ▁generally ▁considered ▁the ▁world ' s ▁fast est ▁computer . ▁Bill ▁Un ru h ▁doubt ed ▁the ▁practical ity ▁of ▁quantum ▁computers ▁in ▁a ▁paper ▁published ▁back ▁in ▁ 1