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Reducing the measurement errors in nonadiabatic holonomic quantum computers

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 64-70页

作者： Guo-Fu xu Department of Physics Shandong University

Nonadiabatic holonomic quantum computers serve as the physical platform for nonadiabatic holonomic quantum *** quantum computation has entered the noisy intermediate-scale era, building accurate intermediate-scale nonadiabatic holonomic quantum computers is clearly necessary. Given that measurements are the sole means of extracting information, they play an indispensable role in nonadiabatic holonomic quantum computers. Accordingly, developing methods to reduce measurement errors in nonadiabatic holonomic quantum computers is of great importance. However, while much attention has been given to the research on nonadiabatic holonomic gates, the research on reducing measurement errors in nonadiabatic holonomic quantum computers is severely lacking. In this study, we propose a measurement error reduction method tailored for intermediate-scale nonadiabatic holonomic quantum computers. The reason we say this is because our method can not only reduce the measurement errors in the computer but also be useful in mitigating errors originating from nonadiabatic holonomic gates. Given these features,our method significantly advances the construction of accurate intermediate-scale nonadiabatic holonomic quantum computers.

关键词： quantum holonomy quantum computation measurement errors

Synthesis of MnCo2O4 Nanocages for high-performance Supercapacitor

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Synthesis of MnCo2O4 Nanocages for high-performance Supercap...

第七届全国物理无机化学学术会议

作者： y.Dong L.Zang y.xu y.Wang L.Jiao H.yuan College of Chemistry Institute of Applied Chemistry Nankai University

Recently,with the fossil-fuel crisis and ever-increasing demand for renewable energy,supercapacitor has attracted considerable interest due to its series advantages,such as high power density,long life span,and fast charge-discharge speed.1,2 Many transition metal oxides have been investigated as electrode materials for supercapacitor.3,4 Among all the explored materials,cobaltite(MnCoO)has been

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BmECM25, from the silkworm Bombyx mori, is an extracellular matrix protein

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BmECM25, from the silkworm Bombyx mori, is an extracellular ...

第十二届家（柞）蚕遗传育种暨良种繁育学术研讨会

作者： Zou Z xu y Ma B Xiang Z He N State Key Laboratory of Silkworm Genome Biology Southwest University

BmECM25（previously reported as BmVMP25） was previously predicted as a gene encoding the vitelline membrane protein in silkworm, Bombyx mori. In this study, we investigated the detail temporal and spatial patterns of BmECM25 protein. Western blot results showed that BmECM25 was expressed in the follicular epithelium cells from stages-6 to +1, and was then secreted into the oocytes. However, the abundance of BmECM25 decreased during the subsequent oogenesis and finally disappeared in the mature follicles. Immunofluorescence detection showed that BmECM25 locates inside the VM layer and forms a discontinuous layer. These features of BmECM25 suggest that it is an oocyte membrane matrix protein, not a vitelline membrane protein.

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Distinct functions of DAZ family proteins and isoforms during spermatogenesis

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Distinct functions of DAZ family proteins and isoforms durin...

中国生理学会生殖科学专业委员会—中国动物学会生殖生物学分会第二次联合学术年会暨“生殖科学专业委员会第二次学术交流会”和“生殖生物学分会第十六次学术年会”

作者： Liuze Gao Dandan Zhang Juan Huang Eugene y.xu State Key Laboratory of Reproductive Medicine Nanjing Medical University

Though infertility affects 105%of couples,only a small number of genes have been shown to be associated with infertility in *** most common molecularly defined genetic cause of male infertility in humans is deletion of Deleted in Azoospermia(DAZ)genes,accounting for 10%of cases of men with no *** humans,DAZ family has three members—BOULE,DAZL and DAZ,and

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DISSOCIATION EQUILIBRIA OF CRyOLITE IN NaF-AIF_3

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Acta Metallurgica Sinica(English Letters) 2000年第6期13卷 1125-1130页

作者： Q. xu, y.M. Ma and Z.X. Qiu (School of Material Science and Metallurgy, Northeastern University, Shenyang 110006, China)

The scheme of dissociation of cryolite in NaF-AlF3 melts was proposed. The constants and heats of dissociation for cryolite were evaluated from experimental data. The mole fractions of each kind of ions at 1298K in NaF-AIF3 melts were calculated based upon this scheme. The thermodynamic mixing function for liquid NaF and solid AIF3, and liquidus data of NaF-AlF3 systems were calculated by using the above evaluated parameters. The results obtained are in good agreement with the experimental data.

关键词： cryolite thermodynamic function NaF-AIF3 melt$

Amalgamated-signal Cymometer Based on TMS320F28335

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Energy and Power Engineering 2013年第4期5卷 1226-1229页

作者： Z. y. xu W. T. Lv Z. y. Li College of Electrical Engineering Zhejiang University Hangzhou China

In our design, an amalgamated-signal cymometer is developed with a TMS320F28335 DSP chip ---- we use its on-chip 12-bit 16-channel AD to conduct a novel dual-sequencer synchronize sampling and averaged to improve the accuracy. Considering the algorithm, we use TI's C28x_FPU_Lib to conduct a FFT with sampled results and correct spectrum with?Time-Shift Phase Difference Correcting Spectrum Method based on all-phase spectral analysis. Namely, we design a sampling-frequency self-adaption algorithm which makes operation keep on without outside-hardware command. Actually, the test result shows that our design's frequency resolution ratio is up to 0.4%, and the maximum frequency’s D-value between main and minor signal is up to 29.99 kHz.

关键词： Digital Frequency Meter Same Precision Measurement DSP All-phase Spectral Analysis Sampling-frequency Self-adaption

The magnetic local time distribution of ring current during the geomagnetic storm

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The magnetic local time distribution of ring current during ...

中国科学院地质与地球物理研究所2013年度（第13届）学术年会

作者： X.D.Zhao A.M.Du W.y.xu Institute of Geology and Geophysics Chinese Academy of Sciences Institute of Geophysics China Earthquake Administration

The magnetic local time distribution of the ring current during 879 geomagnetic storms(identified by SyMH < -30 nT) in the 23rd solar cycle(1996-2006) was investigated by using 23 mid-low latitude ground-based *** sto... 详细信息

The magnetic local time distribution of the ring current during 879 geomagnetic storms(identified by SyMH ycle(1996-2006) was investigated by using 23 mid-low latitude ground-based *** storms are divided into eight different classes with a step of 20 nT for the statistical *** each class,the dusk side events,for which the H component minimum located in the dusk sector is mostly corresponding to the UT of minimum SyMH index,are about 59.5% of the total *** the noon side events are about 20.0%,the night side events are about 18.7%, and the dawn side events are about 1.8%.The H component distributions with MLT indicate that the magnetic field disturbance during the magnetic storm events is not only related to the symmetrical ring current,but also to the other current,mainly the partial current.A further statistical study of the dusk side events shows that both the symmetric and partial ring currents enhance accompanied by the increase in the storm class during the main *** the partial ring current makes a greater contribution to the main phase of the *** to the interplanetary parameters,the distinction of the solar wind velocity V is more obvious than the interplanetary magnetic field B for the dusk side events in different *** comparisons between dusk side and other side events in the same class indicate that besides the solar wind velocity V,the interplanetary magnetic field B also affects on the disturbance of ring current on the ground in MLT.

关键词： Ring current Storm Magnetic local time Magnetic field

Acceleration of 60 MeV proton beams in the commissioning experiment of the SULF-10 PW laser

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High Power Laser Science and Engineering 2022年第4期10卷 36-44页

作者： A.X.Li C.y.Qin H.Zhang S.Li L.L.Fan Q.S.Wang T.J.xu N.W.Wang L.H.yu y.xu y.Q.Liu C.Wang X.L.Wang Z.X.Zhang X.y.Liu P.L.Bai Z.B.Gan X.B.Zhang X.B.Wang C.Fan y.J.Sun y.H.Tang B.yao X.y.Liang y.X.Leng B.F.Shen L.L.Ji R.X.Li Z.Z.xu State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Shanghai Tech University Shanghai 201210China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBejing 100049China CAS Centerfor Excellence inUltra-intense Laser Science Shanghai 201800China College of Science University of Shanghai for Science and TechnologyShanghai 200093China Department of Physics Shanghai Normal UniversityShanghai 200234China

We report the experimental results of the commissioning phase in the 10 PW laser beamline of the Shanghai Superintense Ultrafast Laser Facility(SULF).The peak power reaches 2.4 PW on target without the last amplifying during the *** laser energy of 72±9 J is directed to a focal spot of approximately 6μm diameter(full width at half maximum)in 30 fs pulse duration,yielding a focused peak intensity around 2.0×10^(21)W/cm^(2).The first laser-proton acceleration experiment is performed using plain copper and plastic ***-energy proton beams with maximum cut-off energy up to 62.5 MeV are achieved using copper foils at the optimum target thickness of 4μm via target normal sheath *** plastic targets of tens of nanometers thick,the proton cut-off energy is approximately 20 MeV,showing ring-like or flamented density *** experimental results reflect the capabilities of the SULF-10 PW beamline,for example,both ultrahigh intensity and relatively good beam *** optimization for these key parameters is underway,where peak laser intensities of 10^(22)-10^(23)w/cm^(2)are anticipated to support various experiments on extreme field physics.

关键词： high-energy proton source laser-plasma interaction ultraintense lasers

Mapping non-laminar proton acceleration in laser-driven target normal sheath field

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High Power Laser Science and Engineering 2022年第1期10卷 10-16页

作者： C.y.Qin H.Zhang S.Li S.H.Zhai A.X.Li J.y.Qian J.y.Gui F.X.Wu Z.X.Zhang y.xu X.y.Liang y.X.Leng B.F.Shen L.L.Ji R.X.Li State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China CAS Center for Excellence in Ultra-intense Laser Science Shanghai 201800China Department of Physics Shanghai Normal UniversityShanghai 200234China ShanghaiTech University Shanghai 201210China

We report on experimental observation of non-laminar proton acceleration modulated by a strong magnetic field in laser irradiating micrometer aluminum *** results illustrate the coexistence of ring-like and filamentation *** implement the knife edge method into the radiochromic film detector to map the accelerated beams,measuring a source size of 30-110μm for protons of more than 5 *** diagnosis reveals that the ring-like profile originates from low-energy protons far off the axis whereas the filamentation is from the near-axis high-energy protons,exhibiting non-laminar ***-in-cell simulations reproduced the experimental results,showing that the short-term magnetic turbulence via Weibel instability and the long-term quasi-static annular magnetic field by the streaming electric current account for the measured beam *** work provides direct mapping of laser-driven proton sources in the space-energy domain and reveals the non-laminar beam evolution at featured time scales.

关键词： knife-edge technique laser-plasma interaction non-laminar proton source target normal sheath acceleration Weibel instability