Discovery ntawm lub sij hawm tshiab crystals
Ib daim ntawv coj txawv txawv hu ua lub sij hawm siv lead ua tau tshwm sim nyob rau hauv ob qhov chaw tshiab. Cov kws tshawb fawb tau tsim cov khoom siv lead ua zoo li no hauv monoammonium phosphate, raws li tau tshaj tawm nyob rau lub Tsib Hlis qhov teeb meem ntawm Lub Cev Cov Ntawv Tshawb Fawb, thiab lwm pab pawg tau tsim nws hauv cov kua nruab nrab uas muaj cov hnub qub zoo li cov lus, cov ntawv tshaj tawm no tau tshwm sim hauv Kev Tshawb Fawb Lub Cev.
Tsis zoo li lwm yam piv txwv zoo, sij hawm siv lead ua los ntawm monoammonium phosphate, nws tau tsim los ntawm cov khoom siv nrog cov qauv tsim lub cev, i.e. ib txwm siv lead ua. Tus so ntawm cov ntaub ntawv los ntawm lub sij hawm siv lead ua tau tsim los txog tam sim no tau raug teeb meem. Cov kws tshawb fawb thawj zaug tsim lub sij hawm siv lead ua hauv xyoo 2016. Ib qho ntawm lawv tau ua los ntawm pob zeb diamond nrog qhov tsis xws luag, lwm qhov yog ua los ntawm cov saw ntawm ytterbium ions.
Ordinary crystals xws li ntsev thiab quartz yog cov piv txwv ntawm peb-dimensional, kom spatial crystals. Lawv cov atoms tsim ib qho kev rov ua dua uas paub rau cov kws tshawb fawb tau ntau xyoo. Lub sij hawm crystals txawv. Lawv cov atom ib ntus vibrate ua ntej nyob rau hauv ib qho kev taw qhia thiab tom qab ntawd nyob rau hauv lwm txoj kev, zoo siab los ntawm ib tug pulsating magnetic quab yuam (resonance). Nws yog hu ua "zuam".
Lub ticking nyob rau hauv lub sij hawm siv lead ua muaj nyob rau hauv ib tug tej zaus, txawm hais tias cov interacting pulses muaj sib txawv resonances. Piv txwv li, cov atoms nyob rau hauv lub sij hawm crystals kawm nyob rau hauv ib qho ntawm xyoo tas los thwmsim rotated ntawm ib tug zaus ntawm tsuas yog ib nrab ntawm cov zaus ntawm lub pulsations ntawm lub magnetic teb ua rau lawv.
Cov kws tshawb fawb hais tias kev nkag siab lub sij hawm siv lead ua tuaj yeem ua rau kev txhim kho hauv atomic moos, gyroscopes thiab magnetometers, thiab pab tsim quantum technology. US Defense Advanced Research Projects Agency (DARPA) tau tshaj tawm cov nyiaj pab rau kev tshawb fawb rau hauv ib qho ntawm cov kev tshawb fawb txawv tshaj plaws ntawm xyoo tas los no.
- tus thawj coj ntawm DARPA program hais rau Gizmodo, Dr. Roza Alehanda Lukashev. Cov ntsiab lus ntawm cov kev tshawb fawb no tsis pub leej twg paub, nws hais. Ib qho tuaj yeem xaus lus tias qhov no yog lub cim tshiab ntawm atomic moos, yooj yim dua thiab ruaj khov dua li cov chaw sim ua haujlwm tam sim no. Raws li koj paub, xws li timers yog siv nyob rau hauv ntau yam tseem ceeb tub rog systems, xws li, piv txwv li, GPS.
Nobel nqi zog Frank Wilczek
Ua ntej lub sij hawm crystals tau pom tiag tiag, lawv tau xeeb hauv kev xav. Nws tau tsim ob peb xyoos dhau los los ntawm Asmeskas, Nobel laureate. Frank Wilczek. Nyob rau hauv luv luv, nws lub tswv yim yog ua txhaum symmetry, raws li yog cov ntaub ntawv nrog rau theem hloov. Txawm li cas los xij, nyob rau hauv lub sij hawm theoretical crystals, symmetry yuav tawg tsis tau tsuas yog nyob rau hauv peb spatial qhov ntev, tab sis kuj nyob rau hauv lub plaub - nyob rau hauv lub sij hawm. Raws li Wilczek txoj kev xav, lub cev nqaij daim tawv muaj cov qauv rov ua dua tsis yog nyob hauv qhov chaw xwb tab sis kuj nyob rau lub sijhawm. Qhov teeb meem yog qhov no txhais tau hais tias kev co ntawm atoms nyob rau hauv lub siv lead ua lattice, i.e. txav tsis tau lub zogdab tsi tau txiav txim siab los ntawm physicists yuav ua tsis tau thiab ua tsis tau.
Txawm hais tias peb tseem tsis tau paub cov crystals uas tus kws tshawb xav xav tau thiab tej zaum yuav tsis muaj, nyob rau xyoo 2016 physicists ntawm University of Maryland thiab Harvard University tau tsim "tsis txuas ntxiv" (lossis discrete) lub sij hawm siv lead ua. Cov no yog cov tshuab ntawm atoms lossis ions uas ua rau pom kev sib koom ua ke thiab kev sib tw, coj zoo li yav dhau los tsis paub txog lub xeev tshiab ntawm teeb meem, tiv taus qhov kev cuam tshuam me ntsis.
Txawm hais tias tsis yog txawv txawv li Prof. Wilczek, lub sij hawm nrhiav pom tshiab muaj peev xwm txaus nyiam txaus nyiam ua tub rog. Thiab zoo li tseem ceeb txaus.
