5 papers
Macroscopic Spin GHZ States with a Levitated Ferromagnet
Xueqi Ni, Zhixing Zou, Ping Koy Lam +2
The generation of macroscopic quantum states can drive both fundamental physics and quantum technologies. This work proposes a top-down approach to the generation of macroscopic sp…
Microscopic theory of a precessing ferromagnet for ultrasensitive magnetometry
Xueqi Ni, Zhixing Zou, Ruvi Lecamwasam +5
Levitated systems have great potential in quantum sensing and exploring quantum effects at the macroscopic scale. Of particular interest are recent works suggesting that a levitate…
A Van der Waals Moiré Bilayer Photonic Crystal Cavity
Lesley Spencer, Nathan Coste, Xueqi Ni +9
Enhancing light-matter interactions with photonic structures is critical in classical and quantum nanophotonics. Recently, Moiré twisted bilayer optical materials have been propos…
Control of chirality and directionality of nonlinear metasurface light source via twisting
Huanyu Zhou, Xueqi Ni, Beicheng Lou +3
Metasurfaces have revolutionized nonlinear and quantum light manipulation in the past decade, enabling the design of materials that can tune polarization, frequency, and direction…
On-chip multi-degree-of-freedom control of two-dimensional quantum and nonlinear materials
Haoning Tang, Yiting Wang, Xueqi Ni +7
Two-dimensional materials (2DM) and their derived heterostructures have electrical and optical properties that are widely tunable via several approaches, most notably electrostatic…