Cov Khoom Siv Ua Haujlwm: Dual Enablement ntawm YBCO Txheej -Superconductivity & Kub Dissipation
Lub zog tseem ceeb ntawm qhov txias txias no yog nyob rau hauv kev sib koom ua ke ntawm yttrium barium tooj liab oxide (YBCO) txheej thiabgranite pob zeb. Technical teams xaiv 5-10mm granite gravel (feem ntau yog tsim los ntawm quartz thiab feldspar, nrog thermal expansion coefficient<6×10⁻⁶/℃) as the base, whose naturally dense structure provides a stable framework for the coating. Optimized YBCO coating (chemical composition YBa₂Cu₃O₇₋ₓ) achieves two key performance breakthroughs:
First, high-temperature superconductivity: The coating's critical temperature reaches 92K (-181℃), higher than liquid nitrogen's boiling point (77K). This eliminates the need for expensive liquid helium cooling (4.2K), enabling superconducting state maintenance with liquid nitrogen-reducing cooling costs by 90% while leveraging liquid nitrogen's superior stability for long-term operation. In the superconducting state, the coating's resistance approaches zero, effectively shielding external electromagnetic noise (attenuation rate >99.9%) thiab txo decoherence los ntawm electromagnetic cuam tshuam.
Second, ultra-high thermal conductivity: The composite structure of coating and granite substrate achieves thermal conductivity >200W/m·K-1.5x ntawm cov pa oxygen ib txwm muaj- tooj liab dawb (401W/m·K, txawm tias tsis muaj superconductivity) ntawm tus nqi- ib- kev ua tau zoo, thiab deb tshaj sapphire (46W / m·K). Qhov no high-efficiency tshav kub dissipation sai tshem tawm cov kab hluav taws xob tsim los ntawm qubits (~ 10⁻⁹W), tswj qhov kub thiab txias nyob rau hauv ± 0.1K thiab tsis txhob quantum xeev cuam tshuam los ntawm thermal vibrations.
Kev sib piv cov kev ntsuam xyuas qhia tau hais tias: Ntawm 77K, lub gravel lub thermal diffusivity yog 1.2x ntawm tooj liab, thaum granite tsis muaj hlau nplaum (susceptibility<10⁻⁶) reduces magnetic interference with qubits by 3 orders of magnitude compared to metal substrates.
Kev Ua Tau Zoo: Kev Ua Tau Zoo Leap hauv Qubit Coherence Sijhawm
2024 cov ntaub ntawv xeem los ntawm IBM Zurich Laboratory validates tus nqi tseem ceeb ntawm superconducting quantum gravel. Raws li kev sim zoo ib yam (10mK ib puag ncig, Xmon qubits):
Nrog rau cov pa oxygen-dawb tooj liab substrates, qhov nruab nrab qubit coherence lub sij hawm yog 310 microseconds, feem ntau txwv los ntawm decoherence los ntawm thermal vibrations (60%) thiab electromagnetic cuam tshuam (30%);
Nrog superconducting quantum gravel substrates, lub sij hawm coherence txuas mus rau 2.8 milliseconds-9x ntawm cov txheej txheem ib txwm muaj. Ntawm no, thermal kev cuam tshuam kev cuam tshuam poob mus rau 15% (vim kev ua kom muaj cua sov zoo) thiab kev cuam tshuam electromagnetic rau 5% (vim yog superconducting shielding), ua kom muaj kev ruaj ntseg ntawm quantum xeev.
Qhov kev txhim kho no yog los ntawm "dual-field stabilization": Ntawm ib sab tes, YBCO txheej cov khoom siv hluav taws xob ua tau zoo ua "electromagnetic shield," cais cov chaw sib nqus sab nraud (xws li, geomagnetic fluctuations, ntaus electromagnetic radiation). Ntawm qhov tod tes, cov qauv thermal conductivity stabilizes qubit kev khiav hauj lwm kub ntawm 10mK ± 0.5mK- deb ntawm ± 5mK hloov pauv ntawm cov tsoos substrates -txo quantum xeev hloov los ntawm thermal excitation.
Raws li tus thawj coj ntawm lub chaw soj nstuam sau tseg: "Rau processors nrog 50+ qubits, txhua millisecond ntxiv ntawm coherence lub sij hawm nce tus naj npawb ntawm executable quantum gate operations los ntawm ~10⁴. Qhov no txhais tau hais tias superconducting quantum gravel tuaj yeem txav quantum computers los ntawm 'pov thawj- ntawm {4}cov ntsiab lus ntawm kev ua kom muaj tseeb' kev ua txhaum hauv cryptanalysis, cov khoom simulation, thiab lwm yam. "
Txheej Txheem Ntau Lawm: Scalability Breakthrough ntawm Plasma Txau
Kev siv lub tswv yim ntawm superconducting quantum gravel nyob ntawm qhov sib npaug txheej txheej thiab muaj peev xwm ntau lawm. Cov txheej txheem atmospheric plasma txau txheej txheem tsim los ntawm pab pawg neeg ua haujlwm ua kom muaj txiaj ntsig zoo ntawm YBCO txheej:
Txheej txheem txheej txheem: YBCO hmoov (1-5μm particle loj) yog txhaj rau hauv lub dav hlau plasma (10,000K kub). Molten hais cuam tshuam rau granite gravel nto ntawm kev kub ceev, ua ib txheej tuab (5-10μm thickness). Robotic multi-dimensional rotational spraying ua kom cov txheej txheej sib xws ntawm ± 5μm (vs. ± 20μm rau cov txheej txheem dipping), zam kev hloov hauv zos hauv kev ua haujlwm superconducting.
Muaj peev xwm thiab tus nqi: Ib txoj kab ntau lawm ua tiav 300kg ntawm pob zeb (~ 50,000 daim) ib teev, nrog cov khoom siv txheej txheej ncav cuag 85% (vs . 30% rau cov tsoos sputtering), txo tus nqi substrate rau $ 2.5/gram-1/6 uas ntawm sapphire substrates ($ 15/gram).
Kev Tswjhwm Zoo: 100 daim yog randomly sampled ib batch rau superconducting xeem, nrog rau qhov tseem ceeb kub sib txawv<1K and thermal conductivity fluctuation <5%-meeting quantum computing's stringent material consistency requirements.
Tam sim no, quantum suav cov thawj coj zoo li IBM thiab Google tau muab cov pob zeb no tso rau hauv -gen processor txoj kev npaj ua ntej. Los ntawm 2026, 1000-qubit processors raws li superconducting quantum gravel yuav tsum ua lag luam, nrog kev ua haujlwm ruaj khov 10x siab dua li cov tshuab tam sim no thiab cov nqi kho vajtse txo los ntawm 50%. Raws li cov kws tshuaj ntsuam xyuas kev lag luam sau tseg: "Qhov no zoo li cov pob zeb zoo li no tau tso lub hauv paus cryogenic rau 'computational power revolution' hauv quantum xam."