A5087218131- Quantum Information and Cryptography
- Quantum Computing Algorithms and Architecture
- Quantum and electron transport phenomena
- Quantum Mechanics and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Mass Spectrometry Techniques and Applications
- Quantum Mechanics and Non-Hermitian Physics
- Atomic and Subatomic Physics Research
- Nuclear Physics and Applications
- Radioactive Decay and Measurement Techniques
- Quantum chaos and dynamical systems
- Neural Networks and Reservoir Computing
- Ion-surface interactions and analysis
- Diamond and Carbon-based Materials Research
- Electrochemical Analysis and Applications
- Advanced Optical Imaging Technologies
- Topological Materials and Phenomena
- Virtual Reality Applications and Impacts
- Quantum, superfluid, helium dynamics
- Solid State Laser Technologies
- Advanced Materials Characterization Techniques
- Advanced Fiber Laser Technologies
- Orbital Angular Momentum in Optics
- Quantum optics and atomic interactions
- Advanced Memory and Neural Computing
Beijing Academy of Quantum Information Sciences
2022-2025
Renmin University of China
2022-2025
Tsinghua University
2017-2025
In classical computational chemistry, the coupled-cluster ansatz is one of most commonly used $ab~initio$ methods, which critically limited by its non-unitary nature. The unitary modification as an ideal solution to problem is, however, extremely inefficient in conventional computation. Here, we provide first experimental evidence that indeed version coupled cluster can be reliably performed physical quantum system, a trapped ion system. We perform simulation on electronic structure...
Various quantum applications can be reduced to estimating expectation values, which are inevitably deviated by operational and environmental errors. Although errors tackled error correction, the overheads far from being affordable for near-term technologies. To alleviate detrimental effects of errors, mitigation techniques have been proposed, require no additional qubit resources. Here, we benchmark performance a technique based on probabilistic cancellation in trapped-ion system. Our...
A promising paradigm of quantum computing for achieving practical advantages is annealing or approximate optimization algorithm, where the classical problems are encoded in Ising interactions. However, it challenging to build a system that can efficiently map any structured problems. Here, we present trapped-ion processor efficient encode arbitrary models with all-to-all connectivity up four spins. We implement spin-spin interactions by using coupling trapped ions multiple collective...
Here, we present the first quantum device that generates a molecular spectroscopic signal with phonons in trapped ion system, using SO<sub>2</sub> as an example.
A standard method to obtain information on a quantum state is measure marginal distributions along many different axes in phase space, which forms basis of tomography. We theoretically propose and experimentally demonstrate general framework manifest nonclassicality by observing single distribution only, provides novel insight into practical applicability various systems. Our approach maps the 1-dim factorized 2-dim multiplying measured or vacuum-state an orthogonal axis. The resulting...
Abstract Quantum field theories describe a variety of fundamental phenomena in physics. However, their study often involves cumbersome numerical simulations. simulators, on the other hand, may outperform classical computational capacities due to potential scalability. Here we report an experimental realization quantum simulation fermion–antifermion scattering mediated by bosonic modes, using multilevel trapped ion, which is simplified model fermion both perturbative and non-perturbative...
Non-Hermitian systems with parity-time reversal ($\mathcal{PT}$) or anti-$\mathcal{PT}$ symmetry have attracted a wide range of interest owing to their unique characteristics and counterintuitive phenomena. One the most extraordinary features is presence an exception point (EP), across which phase transition spontaneously broken $\mathcal{PT}$ takes place. We implement Floquet Hamiltonian single qubit by periodically driving dissipative quantum system trapped ion. With stroboscopic emission...
Abstract Whether the observables of a physical system admit real values is fundamental importance to deep understanding nature. In this work, we report device-independent experiment confirm that joint reality two on single two-level incompatible with assumption operational completeness, which strictly weaker than preparation noncontextuality. We implement trapped <?CDATA $^{171}\textrm{Yb}^{+}$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msup> <mml:mi...
Abstract Modern computation relies crucially on modular architectures, breaking a complex algorithm into self-contained subroutines. A client can then call upon remote server to implement parts of the independently via an application programming interface (API). Present APIs relay only classical information. Here we quantum API that enables estimate absolute value trace server-provided unitary operation $$U$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>U</mml:mi>...
Owing to the replication of Floquet bands and presence additional gaps in quasienergy dimension, topological phases a periodically driven system cannot be fully characterized by conventional invariants used static systems. In particular, an anomalous strong phase can host systems, featured nontrivial counterpropagating edge modes which bulk band structure. this paper, we propose scheme obtain complete characterization using only information about dispersions under condition that both...
We introduce a novel time-division multiplexing differential saturated absorption spectroscopy (TDMDSAS) approach, providing superior accuracy and stability in Doppler-free spectroscopy. By distinguishing probe reference fields the temporal domain, TDMDSAS efficiently suppresses Doppler broadening common-mode optical noise. utilized this technology to determine absolute frequency of diverse neutral Yb isotopes across its $6s^2\ ^{1}S_0\to 6s6p ^{1}P_1$ transitions. Furthermore, first-ever...
Exploring quantum phenomena beyond predictions of any classical model has fundamental importance to understand the boundary and descriptions nature. As a typical property that system behaves distinctively from counterpart, contextuality been studied extensively verified experimentally in systems composed at least three levels (qutrit). Here we extend scope experimental test minimal only two states (qubit) by implementing minimum error state discrimination on single $^{171}$Yb$^+$ ion. We...
A promising paradigm of quantum computing for achieving practical advantages is annealing or approximate optimization algorithm, where the classical problems are encoded in Ising interactions. However, it challenging to build a system that can efficiently map any structured problems. Here, we present programmable trapped-ion simulator an model with all-to-all connectivity up four spins. We implement spin-spin interactions by using coupling trapped ions multiple collective motional modes and...
As an essential concept to understand the world, whether real values (or physical realities) of observables are suitable systems beyond classic has been debated for many decades. Although standard no-go results based on Bell inequalities have ruled out joint reality incompatible quantum observables, possibility giving simple yet strong arguments rule in any system (not necessarily quantum) with weaker assumptions and less explored proposed recently. Here, we perform a device-independent...