PUBLICATIONS

Yaoming Chu, Xiangbei Li, Jianming Cai, arXiv :2404.10973 (2024)

Entanglement distinctively sets the quantum world apart from its classical counterpart. Many-particle entangled quantum states are created in an exponentially fast speed through a novel physical picture of quantum delocalization on a correlation landscape, the latter is defined in a minimal operator subspace.

Lei Xiao, Yaoming Chu, Quan Lin, Haiqing Lin, Wei Yi, Jianming Cai, Peng Xue, arXiv:2403.08218(2024)

We confirm the basic mechanism by simulating the sensor-field dynamics using photon interferometry, and, as a concrete example, demonstrate the enhanced sensing of signals encoded in the setting angle of a wave plate.

Musang Gong, Jiahe Xu, Min Yu, Liyin Zhang, Qipeng Li, Ning Wang, and Jianming Cai, Phys. Rev. Applied 21, 024053 (2024)

We propose and demonstrate a hybrid quantum thermometer composed of bulk diamond with ensemble NV centers and gadolinium magnetic flux concentrators, achieving a submicrokelvin resolution. Near the critical point, the spin resonance to temperature is about 774 times enhanced compared with that of bare NV centers.

Min Yu, Xiangbei Li, Yaoming Chu, Bruno Mera, F. Nur Ünal, Pengcheng Yang, Yu Liu, Nathan Goldman, and Jianming Cai, National Science Review, nwae065 (2024)

Berry curvature and Chern numbers of band structures can set lower bounds on metrological properties. We experimentally verify such topological bounds for the first time and demonstrate strong metrological enhancement in topologically non-trivial regime. This work opens the door to metrological applications empowered by topology, with potential implications for quantum many-body systems.

Baiyi Yu, Yaoming Chu, Ralf Betzholz, Shaoliang Zhang, and Jianming Cai, Phys. Rev. Lett. 132, 073202 (2024)

By engineering electric potential of a trapped electron system, the motional states of the trapped electron can obtain giant electric dipole moments, exceeding those attainable with Rydberg atoms. This artificial electric dipole may provide a potential platform for quantum technologies such as ultrahigh-sensitivity electric-field sensing.

Ning Wang and Jianming Cai, Front. Phys. 12, 1320108 (2024)

Hybrid quantum sensing has emerged as a promising avenue for further enhancing the capabilities of diamond sensors. Different techniques can potentially improve the sensitivity, range of detectable parameters, and sensing frequencies of diamond sensors.

Xiaoyu Chen, Haibin Liu, Jianming Cai, arXiv:2401.17323 (2024)

A new type of quantum needle model system can relax the requirement for radical pair lifetime by an order of magnitude, and retains a narrow functional window around the geomagnetic field. This provides evidence for identifying the possible physical mechanism for quantum needle in chemical compass model of avian magnetoreception.

Alon Salhov, Qingyun Cao, Jianming Cai, Alex Retzker, Fedor Jelezko, Genko Genov, arXiv :2312.02267(2023)

We achieve a tenfold coherence time extension by destructive interference of cross-correlated noise, improve control fidelity, and surpass the state-of-the-art sensitivity for high frequency quantum sensing, significantly expanding the applicability of noise protection strategies.

Jingcheng Wang, Shaoliang Zhang, Jianming Cai, Zhenyu Liao, Christian Arenz and Ralf Betzholz, Phys. Rev. A 108, 022408 (2023)

We find that before the mean value of the logarithm of the condition number as a function of the driving time asymptotically approaches the value predicted for a Haar-random evolution it reaches a plateau whose length increases with the system size.

Simon B. Jäger and Ralf Betzholz, Phys. Rev. A 108, 013110 (2023)

We demonstrate that this effective master equation can also be used to describe cooling in systems with light-matter interactions. And we present how the effective master equation can be extended to the case of nonvanishing mean thermal occupations of the bosonic mode.