Beijing Academy of Quantum Information Sciences

A nuclear clock synchronized to 229Th

Abstract Atomic clocks have made time and frequency the most precisely measured quantities in physics, progressing from microwave standards that realize the SI second 1 to optical clocks with unprecedented precision 2 . A nuclear clock transfers the frequency reference from an el...

Perturbative Variational Quantum Eigensolver via Reduced Density Matrices

Abstract Current noisy intermediate-scale quantum (NISQ) devices remain limited in their ability to perform accurate quantum chemistry simulations because of restricted numbers of high-fidelity qubits and short coherence times. To overcome these challenges, we introduce a reduced...

Customized Itinerant Frequency Combs by Cascaded Nonlinear Effects

ABSTRACT Frequency combs are pivotal in nonlinear optics, with extensive applications in modern optics and precision measurement. Precise control over their critical parameters is essential to enhance performance and expand the range of applications. In this work, we develop a ca...

Growth and electrical transport property studies of Bi2Se3 thin films with Cr or MnPc surface magnetic modification

The Bi2Se3 family is widely regarded as the prototypical three-dimensional topological insulator, which is an ideal platform for investigating topological quantum phenomena such as the quantum anomalous Hall effect and Majorana fermions. Further application requires high-quality...

Fragility of Magic State Distillation under Imperfect Measurements

Magic state distillation (MSD) is the leading approach for producing the non-Clifford resources required for universal fault-tolerant quantum computation. Most prior analyses of MSD assume ideal projective stabilizer measurements, but this assumption becomes questionable on near-...

High-Quality InSb Nanowires Grown by Molecular-Beam Epitaxy via Precise Catalyst Modulation

Abstract Semiconductor InSb nanowires are a major material candidate for topological quantum computation. The nanowires in current devices were mostly grown using metal–organic chemical vapor deposition, which is incompatible with in situ growth of superconductors, a crucial requ...

Dynamics of a jointly commensurate moiré charge density wave

Abstract The advent of two-dimensional moiré systems has revolutionized the exploration of phenomena arising from strong correlations and nontrivial band topology. Recently, a moiré superstructure formed by two coexisting charge density waves with slightly mismatched wavevectors...

Label-free dynamic cell imaging of fresh ex vivo spinal meningiomas: a nine-case optical-pathological correlation study with specimen-level H&E references

Spinal meningioma subtype and grade still rest on haematoxylin and eosin (H&E) morphology, but permanent sections become available only after fixation and embedding, and intraoperative assessment of fresh tissue relies mainly on frozen section. Dynamic cell imaging (DCI), a label...

Magnetic Insights Into Heterogeneous and Nonequilibrium Electrochemical Reactions

ABSTRACT Electrochemical energy systems are governed by interfacial reactions that are spatially heterogeneous and far from equilibrium, causing deviations from ideal behavior and unexpected phenomena. Despite significant advances, conventional characterization techniques remain...