533 citations · 4.3k across the 52 of their papers we have counts for
53 papers
Optomechanics of optically-levitated particles: A tutorial and perspective
George Winstone, Alexey Grinin, Mishkat Bhattacharya +4
Optomechanics, the study of the mechanical interaction of light with matter, has proven to be a fruitful area of research that has yielded many notable achievements, including the…
Quantum sensing and imaging with spin defects in hexagonal boron nitride
Sumukh Vaidya, Xingyu Gao, Saakshi Dikshit +2
Color centers in hexagonal boron nitride (hBN) have recently emerged as promising candidates for a new wave of quantum applications. Thanks to hBN's high stability and 2-dimensiona…
Near-field GHz rotation and sensing with an optically levitated nanodumbbell
Peng Ju, Yuanbin Jin, Kunhong Shen +5
A levitated non-spherical nanoparticle in a vacuum is ideal for studying quantum rotations and is an extremely sensitive torque and force detector. It has been proposed to probe fu…
Coherent dynamics of strongly interacting electronic spin defects in hexagonal boron nitride
Ruotian Gong, Guanghui He, Xingyu Gao +6
Optically active spin defects in van der Waals materials are promising platforms for modern quantum technologies. Here we investigate the coherent dynamics of strongly interacting…
Greatly Enhanced Emission from Spin Defects in Hexagonal Boron Nitride Enabled by a Low-Loss Plasmonic Nano-Cavity
Xiaohui Xu, Abhishek. B. Solanki, Demid Sychev +13
Two-dimensional hexagonal boron nitride (hBN) has been known to host a variety of quantum emitters with properties suitable for a broad range of quantum photonic applications. Amon…
On-demand assembly of optically-levitated nanoparticle arrays in vacuum
Jiangwei Yan, Xudong Yu, Zheng Vitto Han +2
Realizing a large-scale fully controllable quantum system is a challenging task in current physical research and has broad applications. Ultracold atom and molecule arrays in optic…
Correlative nanoscale imaging of strained hBN spin defects
David Curie, Jaron T. Krogel, Lukas Cavar +11
Spin defects like the negatively charged boron vacancy color center () in hexagonal boron nitride (hBN) may enable new forms of quantum sensing with near-surface defects in…
Switching and amplifying three-body Casimir effects
Zhujing Xu, Peng Ju, Xingyu Gao +3
The dynamics of three interacting objects has been investigated extensively in Newtonian gravitational physics (often termed the three-body problem), and is important for many quan…
Stability of the discrete time-crystalline order in spin-optomechanical and open cavity QED systems
Zhengda Hu, Xingyu Gao, Tongcang Li
Discrete time crystals (DTC) have been demonstrated experimentally in several different quantum systems in the past few years. Spin couplings and cavity losses have been shown to p…
Excited-state spin-resonance spectroscopy of V defect centers in hexagonal boron nitride
Nikhil Mathur, Arunabh Mukherjee, Xingyu Gao +5
The recently discovered spin-active boron vacancy (V) defect center in hexagonal boron nitride (hBN) has high contrast optically-detected magnetic resonance (ODMR) at…
On-chip optical levitation with a metalens in vacuum
Kunhong Shen, Yao Duan, Peng Ju +6
Optical levitation of dielectric particles in vacuum is a powerful technique for precision measurements, testing fundamental physics, and quantum information science. Conventional…
Broadband circularly polarized thermal radiation from magnetic Weyl semimetals
Yifan Wang, Chinmay Khandekar, Xingyu Gao +3
We numerically demonstrate that a planar slab made of magnetic Weyl semimetal (a class of topological materials) can emit high-purity circularly polarized (CP) thermal radiation ov…
High-contrast plasmonic-enhanced shallow spin defects in hexagonal boron nitride for quantum sensing
Xingyu Gao, Boyang Jiang, Andres E. Llacsahuanga Allcca +9
The recently discovered spin defects in hexagonal boron nitride (hBN), a layered van der Waals material, have great potential in quantum sensing. However, the photoluminescence and…
Non-reciprocal energy transfer through the Casimir effect
Zhujing Xu, Xingyu Gao, Jaehoon Bang +2
A fundamental prediction of quantum mechanics is that there are random fluctuations everywhere in a vacuum because of the zero-point energy. Remarkably, quantum electromagnetic flu…
Femtosecond Laser Writing of Spin Defects in Hexagonal Boron Nitride
Xingyu Gao, Siddhant Pandey, Mehran Kianinia +5
Optically active spin defects in wide-bandgap materials have many potential applications in quantum information and quantum sensing. Spin defects in two-dimensional layered van der…
Thermal equilibrium spin torque: Near-field radiative angular momentum transfer in magneto-optical media
Xingyu Gao, Chinmay Khandekar, Zubin Jacob +1
Spin and orbital angular momentum of light plays a central role in quantum nanophotonics as well as topological electrodynamics. Here, we show that the thermal radiation from finit…
Mechanical Quantum Sensing in the Search for Dark Matter
Daniel Carney, Gordan Krnjaic, David C. Moore +32
Numerous astrophysical and cosmological observations are best explained by the existence of dark matter, a mass density which interacts only very weakly with visible, baryonic matt…
5D cooling and nonlinear dynamics of an optically levitated nanodumbbell
Jaehoon Bang, Troy Seberson, Peng Ju +5
Optically levitated nonspherical particles in vacuum are excellent candidates for torque sensing, rotational quantum mechanics, high-frequency gravitational wave detection, and mul…
Classical and quantum time crystals in a levitated nanoparticle without drive
Yi Huang, Qihao Guo, Anda Xiong +2
Time crystal is defined as a phase of matter spontaneously exhibiting a periodicity in time. Previous studies focused on discrete quantum time crystals under periodic drive. Here,…
Preparing squeezed spin states in a spin-mechanical hybrid system with silicon-vacancy centers
Bo Li, Xiaoxiao Li, Pengbo Li +1
We present and analyze an effective scheme for preparing squeezed spin states in a novel spin-mechanical hybrid device, which is realized by a single crystal diamond waveguide with…
Simulation of sympathetic cooling an optically levitated magnetic nanoparticle via coupling to a cold atomic gas
T. Seberson, Peng Ju, Jonghoon Ahn +3
A proposal for cooling the translational motion of optically levitated magnetic nanoparticles is presented. The theoretical cooling scheme involves the sympathetic cooling of a fer…
Quantum information processing with closely-spaced diamond color centers in strain and magnetic fields
Zhujing Xu, Zhang-qi Yin, Qinkai Han +1
Electron and nuclear spins of diamond nitrogen-vacancy (NV) centers are good candidates for quantum information processing as they have long coherence time and can be initialized a…
Ultrasensitive torque detection with an optically levitated nanorotor
Jonghoon Ahn, Zhujing Xu, Jaehoon Bang +3
Torque sensors such as the torsion balance enabled the first determination of the gravitational constant by Cavendish and the discovery of Coulomb's law. Torque sensors are also wi…
Single-Photon Pulse Induced Transient Entanglement Force
Li-Ping Yang, Chinmay Khandekar, Tongcang Li +1
We show that a single photon pulse (SPP) incident on two interacting two-level atoms induces a transient entanglement force between them. After absorption of a multi-mode Fock stat…