A5087904528- Quantum and electron transport phenomena
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Semiconductor Quantum Structures and Devices
- Quantum Information and Cryptography
- Particle Detector Development and Performance
- Advancements in Semiconductor Devices and Circuit Design
- Quantum Chromodynamics and Particle Interactions
- Galaxies: Formation, Evolution, Phenomena
- Astrophysical Phenomena and Observations
- Graphene research and applications
- Semiconductor materials and devices
- Particle Accelerators and Free-Electron Lasers
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Mechanical and Optical Resonators
- Gamma-ray bursts and supernovae
- Microbial bioremediation and biosurfactants
- Particle accelerators and beam dynamics
- Quantum Computing Algorithms and Architecture
- Advanced MEMS and NEMS Technologies
- Force Microscopy Techniques and Applications
- Cosmology and Gravitation Theories
- Superconducting Materials and Applications
- Bone Tissue Engineering Materials
Peking University
2025
Chinese Academy of Sciences
2015-2024
Institute of High Energy Physics
2013-2024
Nanjing Tech University
2024
Hubei University
2024
China Railway Major Bridge Reconnaissance & Design Institute (China)
2024
University of Science and Technology of China
2012-2021
CAS Key Laboratory of Urban Pollutant Conversion
2015-2021
Shanghai Normal University
2010-2021
Nanjing Agricultural University
2021
A basic requirement for quantum information processing is the ability to universally control state of a single qubit on timescales much shorter than coherence time. Although ultrafast optical spin has been achieved in dots, scaling up such methods remains challenge. Here we demonstrate complete quantum-dot charge picosecond scale [corrected], orders magnitude faster previously measured electrically controlled charge- or spin-based qubits. We observe tunable dynamics charge-stability diagram,...
The utility of endophytic bacteria in Cadmium (Cd) remediation has gained significant attention due to their ability alleviate metal-induced stress and enhance plant growth. Here, we investigate C. metallidurans CML2, an bacterial strain prevalent rice, showing resilience against 2400 mg/L Cd(II). We conducted in-depth integrated morphological transcriptomic analysis illustrating the multifarious mechanisms CML2 employs combat Cd, including formation biofilm CdO nanoparticles, upregulation...
Plant-microbe interactions are considered to be important processes determining the efficiency of phytoremediation petroleum pollution, however relatively little is known about how these influenced by pollution. In this experimental study using a microcosm approach, we examined plant ecophysiological traits, soil nutrients and microbial activities were pollution in Phragmites australis, phytoremediating species. Generally, reduced performance, especially at early stages growth. Petroleum had...
We experimentally demonstrate a tunable hybrid qubit in five-electron GaAs double quantum dot. The is encoded the (1,4) charge regime of dot and can be manipulated completely electrically. More importantly, anharmonicity leads to quasiparallel energy levels new anticrossing, which help preserve coherence yield useful working point. have performed Larmor precession Ramsey fringe experiments near point find that decoherence time significantly improved over qubit. This work shows way encode...
With recent advances in the circuit quantum electrodynamics (cQED) architecture, hybrid systems that couple nano-devices to microwave resonators have been developing rapidly. Here we report an experimental demonstration of two graphene double dots (DQDs) coupled over a distance up 60 {\mu}m, through resonator. We jointly measure DQDs' coupling resonator, which causes nonlinear response resonator reflection amplitude vicinity degeneracy points DQDs. This phenomenon is explained by...
Mechanical resonators are promising systems for storing and manipulating information. To transfer information between mechanical modes, either direct coupling or an interface these modes is needed. In previous works, strong different in a single resonator interaction neighboring have been demonstrated. However, distant resonators, which crucial request long-distance classical quantum processing using devices, remains experimental challenge. Here, we report the observation of indirect...
Abstract Biological nitrogen fixation (BNF) is the major natural process of (N) input to ecosystems. To understand how plant invasion and N enrichment affect BNF, we compared soil N-fixation rates N-fixing microbes (NFM) an invasive Spartina alterniflora community a native Phragmites australis in Yangtze River estuary, with without addition. Our results indicated that relative had greater influence on BNF. At each level, S. higher rate but lower diversity nifH gene comparison community. The...
Abstract Universal multiple-qubit gates can be implemented by a set of universal single-qubit and any one kind entangling two-qubit gate, such as controlled-NOT gate. For semiconductor quantum dot qubits, gate operations have so far only been demonstrated in individual electron spin-based systems. Here we demonstrate the conditional rotation two capacitively coupled charge each consisting an confined GaAs/AlGaAs double dot. Owing to strong inter-qubit coupling strength, with clock speed up 6...
Coupling an electromechanical resonator with carbon-nanotube quantum dots is a significant method to control both the electronic charge and spin states. By exploiting novel microtransfer technique, we fabricate two separate strongly coupled electrically tunable mechanical resonators for first time. The frequency of can be individually tuned by bottom gates, in each resonator, electron transport through dot affected phonon mode vice versa. Furthermore, conductance either nonlocally modulated...
Abstract In this work, we present the first results of long-term high-cadence spectroscopic monitoring 15 PG quasars with relatively strong Fe ii emission, as a part broader reverberation mapping campaign performed using Calar Alto Observatory’s 2.2 m telescope. The V -band, 5100 Å continuum, and H β broad emission line light curves are measured for set periods ranging from dozens to more than hundred epochs between 2017 May 2020 July. Accurate time lags variations broad-line fluxes optical...
In this third paper of the series reporting on reverberation mapping (RM) campaign active galactic nuclei with asymmetric H$\beta$ emission-line profiles, we present results for 15 Palomar-Green (PG) quasars using spectra obtained between end 2016 to May 2021. This combines long time spans relatively high cadence. For 8 objects, both lags from entire light curves and measurements individual observing seasons are provided. Reverberation 9 our targets has been attempted first time, while 6...
We use an on-chip superconducting resonator as a sensitive meter to probe the properties of graphene double quantum dots at microwave frequencies. Specifically, we investigate charge dephasing rates in circuit electrodynamics architecture. The strongly depend on number charges dots, and variation has period four charges, over extended range numbers. Although exact mechanism this fourfold periodicity is open problem, our observations hint degeneracy expected from its spin valley degrees freedom.
Following the discovery of Higgs boson at LHC, new large colliders are being studied by international high-energy community to explore physics in detail and beyond Standard Model. In China, a two-stage circular collider project CEPC-SPPC is proposed, with first stage CEPC (Circular Electron Positron Collier, so-called factory) focused on physics, second SPPC (Super Proton-Proton Collider) This paper discusses this stage.
The spatial distributions of bacterial communities may be driven by multiple environmental factors. Thus, understanding the relationships between distribution and factors is critical for wetland stability functioning freshwater lakes. However, little research on in deep sediment layers exists. In this study, thirty clone libraries 16S rRNA were constructed from a beach Poyang Lake along both horizontal (distance to water-land junction) vertical (sediment depth) gradients assess effects...
Two-dimensional layered materials, such as transition metal dichalcogenides (TMDCs), are promising materials for future electronics owing to their unique electronic properties. With the presence of a band gap, atomically thin gate defined quantum dots (QDs) can be achieved on TMDCs. Here, standard semiconductor fabrication techniques used demonstrate confined structures WSe2 with tunnel barriers by electric fields, thereby eliminating edge states induced etching steps, which commonly appear...
Semiconductor quantum dots are promising hosts for qubits to build a processor. In the last twenty years, intensive researches have been carried out and diverse kinds of based on different types semiconductor were developed. Recent advances prove high fidelity single two qubit gates, even prototype algorithms. These breakthroughs motivate further research realizing fault tolerant computer. this paper we review main principles various dot latest associated experimental results. Finally future...
Vibrational modes in mechanical resonators provide a promising candidate to interface and manipulate classical quantum information. The observation of coherent dynamics between distant can be key step toward scalable phonon-based applications. Here we report tunable phonon with an architecture comprising three graphene coupled series, where all manipulated by electrical signals on control gates. We demonstrate Rabi oscillations spatially separated indirectly via intermediate resonator...
Despite many decades of study, the kinematics broad-line region 3C~273 are still poorly understood. We report a new, high signal-to-noise, reverberation mapping campaign carried out from November 2008 to March 2018 that allows determination time lags between emission lines and variable continuum with precision. The lag variations in H$β$ relative those 5100 Angstrom is $146.8_{-12.1}^{+8.3}$ days rest frame, which agrees very well Paschen-$α$ measured by GRAVITY at Very Large Telescope...
The changes of broad emission lines should be a crucial issue to understanding the physical properties changing-look active galactic nucleus (CL-AGN). Here, we present results an intensive and homogeneous 6-month long reverberation mapping (RM) monitoring campaign during low-activity state CL-AGN Seyfert galaxy NGC 3516. Photometric spectroscopic was carried out 2018--2019 with Lijiang 2.4 m telescope. sampling is 2 days in most nights, average $\sim$3 days. rest frame time lags H$\alpha$...
We report the results of a multi-year spectroscopic and photometric monitoring campaign two luminous quasars, PG~0923+201 PG~1001+291, both located at high-luminosity end broad-line region (BLR) size-luminosity relation with optical luminosities above $10^{45}~{\rm erg~s^{-1}}$. is for first time monitored, PG~1001+291 was previously monitored but our has much longer temporal baseline. detect lags variations broad H$\beta$, H$\gamma$, Fe {\sc ii} lines respect to those 5100~{\AA} continuum....