A5055499521- Atomic and Subatomic Physics Research
- Quantum optics and atomic interactions
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced MRI Techniques and Applications
- Earthquake Detection and Analysis
- Parallel Computing and Optimization Techniques
- Laser-induced spectroscopy and plasma
- Algorithms and Data Compression
- Diamond and Carbon-based Materials Research
- Boron and Carbon Nanomaterials Research
- Antenna Design and Optimization
- Magnetic Properties and Synthesis of Ferrites
- Nanoparticle-Based Drug Delivery
- Microwave Engineering and Waveguides
- Laser Design and Applications
- Antenna Design and Analysis
- Graphene research and applications
- Geophysics and Sensor Technology
- Advanced Frequency and Time Standards
- Acoustic Wave Resonator Technologies
- Physics of Superconductivity and Magnetism
- Iron oxide chemistry and applications
- Quantum, superfluid, helium dynamics
- Orbital Angular Momentum in Optics
- Topological Materials and Phenomena
Princeton University
1975-2025
Harvard University Press
2025
Amherst College
2017-2018
We describe a direct gradiometer using optical pumping with opposite circular polarization in two $^{87}$Rb atomic ensembles within single multipass cell. A far-detuned probe laser undergoes near-zero paramagnetic Faraday rotation due to the intrinsic subtraction of contributions exceeding 3.5 rad from highly-polarized ensembles. develop analysis methods for signal and measure sensitivity $10.1$ fT/cm$\sqrt{\mathrm{Hz}}$. also demonstrate that our design, addition increasing depth, provides...
We experimentally simulate a quantum-mechanical particle interacting with knotted electromagnetic fields.
The authors report a striking advance in measuring tiny magnetic fields under ambient conditions, using atom--light-interaction techniques enabled by cutting-edge technology. A prototype sensor detects the generated human brain or heart, field-deployable system that works with great sensitivity, unshielded Earth's own field. This technology is scalable to arrays and can be made low-cost, which opens pathways wide variety of applications, such as field triage, brain-machine interfaces, navigation.
We describe a finite fields magnetic gradiometer using an intense pulsed laser to polarize $^{87}$Rb atomic ensemble and compact VCSEL probe detect paramagnetic Faraday rotation in single multipass cell. report differential sensitivity of $14$ fT/Hz$^{1/2}$ over broad dynamic range including Earth's field magnitude common-mode rejection ratio higher than $10^4$. also observe nearly quantum-noise-limited behaviour the gradiometer, by comparing experimental standard deviation estimated...
Abstract We introduce a vector atomic magnetometer that employs fast-rotating magnetic field applied to pulsed 87 Rb scalar magnetometer. This approach enables simultaneous measurements of the total and its two polar angles relative rotation plane. Operating in gradiometer mode, achieves gradient sensitivity 35 $${{{\rm{fT}}}}/\sqrt{{{{\rm{Hz}}}}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>fT</mml:mi> <mml:mo>/</mml:mo> <mml:msqrt> <mml:mrow> <mml:mi>Hz</mml:mi>...
The negatively charged boron vacancy (V_{B}^{-}) in hexagonal nitride (hBN) has garnered significant attention among defects two-dimensional materials. This owes, part, to its deterministic generation, well-characterized atomic structure, and optical polarizability at room temperature. We investigate the latter through extensive measurements probing both ground excited state polarization dynamics. develop a semiclassical model based on these that predicts near-unity degree of spin...
The authors present several methods for heading error suppression in all-optical alkali-vapor magnetometers geomagnetic field ranges. These improvements could result more precise measurements of Earth's magnetic and the development compact miniaturized sensors.
Magnetic monopoles have been sought for decades but never definitively observed. Recent experiments created different analogs of in Bose-Einstein condensates, including quantum-mechanical and Dirac monopoles. Now a new experiment this system shows how monopole can evolve into monopole.
We describe an optically pumped atomic gradiometer operating at finite fields, including Earth's field, with 14 fT / Hz sensitivity. demonstrate its quantum-noise-limited behaviour in the presence of quantum spin noise and diffusion.