Xinhua Peng

University of Science and Technology of China

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Jiangfeng Du

University of Science and Technology of China

Min Jiang

University of Science and Technology of China

Dieter Suter

TU Dortmund University

Hu Zhou

China Agricultural University

Jun Li

Shenzhen University

Zhaokai Li

University of Science and Technology of China

Haowen Su

University of Science and Technology of China

Ze Wu

University of Science and Technology of China

Dmitry Budker

University of California, Berkeley

Yuanhong Wang

First Affiliated Hospital of Heilongjiang University of Chinese Medicine

Cooperative Institutions

Chinese Academy of Sciences

187

University of Science and Technology of China

147

University of Chinese Academy of Sciences

Institute of Soil Science

Hefei National Center for Physical Sciences at Nanoscale

Tsinghua University

Ministry of Agriculture and Rural Affairs

Southern University of Science and Technology

Beijing Academy of Quantum Information Sciences

CAS Key Laboratory of Urban Pollutant Conversion

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Does animal manure application improve soil aggregation? Insights from nine long-term fertilization experiments

The Science of The Total Environment (2019)

Zichun Guo Jiabao Zhang Jun Fan Xueyun Yang Yanli Yi

Soil carbon

Glomalin

10.1016/j.scitotenv.2019.01.051

Cite

Citations (116)

NMR Implementation of a Molecular Hydrogen Quantum Simulation with Adiabatic State Preparation

Physical Review Letters (2010)

Jiangfeng Du Nanyang Xu Xinhua Peng Pengfei Wang Sanfeng Wu

It is difficult to simulate quantum systems on classical computers, while quantum computers have been proved to be able to efficiently perform such kinds of simulations. We report an NMR implementation simulating the hydrogen molecule (H2) in a minimal basis to obtain its ground-state energy. Using an iterative NMR interferometer to measure the phase shift, we achieve a 45-bit estimation of the energy value. The efficiency of the adiabatic state preparation is also experimentally tested with various configurations of the same molecule.

Hydrogen molecule

Basis (linear algebra)

10.1103/physrevlett.104.030502

Cite

Citations (259)

Experimental implementation of remote state preparation by nuclear magnetic resonance

Physics Letters A (2003)

Xinhua Peng Xiwen Zhu Ximing Fang Mang Feng Maili Liu

Quantum information processing

10.1016/s0375-9601(02)01604-3

Cite

Citations (184)

Performance comparison of dynamical decoupling sequences for a qubit in a rapidly fluctuating spin bath

Physical Review A (2010)

Gonzalo A. Álvarez Ashok Ajoy Xinhua Peng Dieter Suter

Avoiding the loss of coherence of quantum mechanical states is an important prerequisite for quantum information processing. Dynamical decoupling (DD) is one of the most effective experimental methods for maintaining coherence, especially when one can access only the qubit-system and not its environment (bath). It involves the application of pulses to the system whose net effect is a reversal of the system-environment interaction. In any real system, however, the environment is not static, and therefore the reversal of the system-environment interaction becomes imperfect if the spacing between refocusing pulses becomes comparable to or longer than the correlation time of the environment. The efficiency of the refocusing improves therefore if the spacing between the pulses is reduced. Here, we quantify the efficiency of different DD sequences in preserving different quantum states. We use 13C nuclear spins as qubits and an environment of 1H nuclear spins as the environment, which couples to the qubit via magnetic dipole-dipole couplings. Strong dipole-dipole couplings between the proton spins result in a rapidly fluctuating environment with a correlation time of the order of 100 us. Our experimental results show that short delays between the pulses yield better performance if they are compared with the bath correlation time. However, as the pulse spacing becomes shorter than the bath correlation time, an optimum is reached. For even shorter delays, the pulse imperfections dominate over the decoherence losses and cause the quantum state to decay.

Dynamical decoupling

Decoupling (probability)

10.1103/physreva.82.042306

Cite

Citations (101)

Experimental demonstration of deterministic one-way quantum computation on a NMR quantum computer

Physical Review A (2010)

Chenyong Ju Jing Zhu Xinhua Peng Bo Chong Xianyi Zhou

One-way quantum computing is an important and novel approach to quantum computation. By exploiting the existing particle-particle interactions, we report an experimental realization of the complete process of deterministic one-way quantum Deutsch-Josza algorithm in NMR, including graph state preparation, single-qubit measurements, and feed-forward corrections. The findings in our experiment may shed light on the future scalable one-way quantum computation.

Realization (probability)

One-way quantum computer

10.1103/physreva.81.012322

Cite

Citations (11)

Physical Realization of a Quantum Oracle Machine

arXiv (Cornell University) (2016)

Jun Li Xiaodong Yang Xinhua Peng Chang-Pu Sun

Turing's notion of oracle machine is influential in diverse fields like computation, communication as well as philosophy. It has long been a fascinating open issue on construction of a real working oracle machine. Here, we address physical implementation of a quantum oracle machine which resolves the quantum optimal control problem. We show that the most computationally challenging part of gradient ascent pulse engineering, namely computing the fidelity and gradient for input control pulse, can be accomplished by the process of physical evolution and measurement on the quantum system being controlled. The quantum system outputs the desired information for gradient iteration at a constant and affordable cost thus can be treated as an oracle. By posing queries to and receiving messages from the oracle, classical computing devices update the control parameters until an optimum is achieved. To demonstrate the idea in experiment, we use a nine-spin nuclear magnetic resonance system, on which we have succeeded in preparing a seven-correlated quantum state without involving simulating the large Hilbert space evolution.

Realization (probability)

Oracle Unified Method

Physical system

Source

Cite

Citations (1)

Characterizing Spatiotemporal Trends and Classification of Seasonal Drought in the Red Soil Region of Southern China

Yong Zhong Lei Gao Xinhua Peng Asim Biswas Wei Hu

Red soil

Southern china

10.2139/ssrn.4924355

Cite

Citations (0)

Linking saturated hydraulic conductivity and air permeability to the characteristics of biopores derived from X-ray computed tomography

Journal of Hydrology (2019)

Zhongbin Zhang Kailou Liu Hu Zhou Henry Lin Daming Li

Macropore

Soil structure

10.1016/j.jhydrol.2019.01.041

Cite

Citations (59)

Selective Detection of Dynamics-Complete Set of Correlations via Quantum Channels

Physical Review Letters (2024)

Ze Wu Ping Wang Tianyun Wang Yuchen Li Ran Liu

Correlations of fluctuations are essential to understanding many-body systems and key information for advancing quantum technologies. To fully describe the dynamics of a physical system, all time-ordered correlations (TOCs), i.e., the dynamics-complete set of correlations are needed. The current measurement techniques can only access a limited set of TOCs, and there has been no systematic and feasible solution for extracting the dynamic-complete set of correlations hitherto. Here we propose a platform-universal protocol to selectively detect arbitrary types of TOCs via quantum channels. In our method, the quantum channels are synthesized with various controls, and engineer the evolution of a sensor-target system along a specific path that corresponds to a desired correlation. Using nuclear magnetic resonance, we experimentally demonstrate this protocol by detecting a specific type of fourth-order TOC that has never been accessed previously. We also show that the knowledge of the TOCs can be used to significantly improve the precision of quantum optimal control. Our method provides a new toolbox for characterizing the quantum many-body states and quantum noise, and hence for advancing the fields of quantum sensing and quantum computing.

Dynamics

10.1103/physrevlett.132.200802

Cite

Citations (2)

Speedup of quantum-state transfer by three-qubit interactions: Implementation by nuclear magnetic resonance

Physical Review A (2006)

Jingfu Zhang Xinhua Peng Dieter Suter

Universal quantum information processing requires single-qubit rotations and two-qubit interactions as minimal resources. A possible step beyond this minimal scheme is the use of three-qubit interactions. We consider such three-qubit interactions and show how they can reduce the time required for a quantum state transfer in an $XY$ spin chain. For the experimental implementation, we use liquid-state nuclear magnetic resonance, where three-qubit interactions can be implemented by sequences of radio-frequency pulses.

One-way quantum computer

Speedup

Flux qubit

10.1103/physreva.73.062325

Cite

Citations (28)