73 citations · 320 across the 12 of their papers we have counts for
12 papers
Adaptive Real-Time Magnetic Field Tracking beyond Prior Waveform Constraints
Yihan Wang, Xiaofeng Jin, Yuchuan Ming +4
The extraction of weak signals plays a crucial role in quantum precision measurement, where the estimation results are often limited by low signal-to-noise ratios. Here, we demonst…
Full symmetry-breaking of electronic and nuclear dynamics for low attosecond resolution of electronic chirality
Tianlv Xu, Jiawen Kong, Tianjing Zhou +5
Attosecond science is an emerging topic where chirality plays a central role. Here we demonstrate subjecting iodoacetylene, a geometrically achiral molecule, to a pair of simulated…
Anomalous noise spectra in a spin-exchange-relaxation-free alkali-metal vapor
K. Mouloudakis, J. Kong, A. Sierant +4
We perform spin-noise spectroscopy on an unpolarized vapor in the spin-exchange-relaxation-free (SERF) regime. We observe noise spectral distributions that devia…
Dynamical quantum phase transitions in a spinor Bose-Einstein condensate and criticality enhanced quantum sensing
Lu Zhou, Jia Kong, Zhihao Lan +1
Quantum phase transitions universally exist in the ground and excited states of quantum many-body systems, and they have a close relationship with the nonequilibrium dynamical phas…
Effects of spin-exchange collisions on the fluctuation spectra of hot alkali-metal vapors
K. Mouloudakis, G. Vasilakis, V. G. Lucivero +3
We present a first-principles analysis of the noise spectra of alkali-metal-metal vapors in and out of the spin-exchange-relaxation-free (SERF) regime, and we predict non-intuitive…
Squeezed-light enhancement and backaction evasion in a high sensitivity optically pumped magnetometer
C. Troullinou, R. Jiménez-Martínez, J. Kong +2
We study the effect of optical polarization squeezing on the performance of a sensitive, quantum-noise-limited optically pumped magnetometer. We use Bell-Bloom (BB) optical pumping…
SU(2)-in-SU(1,1) Nested Interferometer for Highly Sensitive, Loss-Tolerant Quantum Metrology
Wei Du, Jia Kong, Jun Jia +6
We present experimental and theoretical results on a new interferometer topology that nests a SU(2) interferometer, e.g., a Mach-Zehnder or Michelson interferometer, inside a SU(1,…
Quantum dense metrology by an SU(2)-in-SU(1,1) nested interferometer
Wei Du, J. F. Chen, Z. Y. Ou +1
With the help of quantum entanglement, quantum dense metrology (QDM) is a technique that can perform the joint estimates of two conjugate quantities such as phase and amplitude mod…
Signal tracking beyond the time resolution of an atomic sensor by Kalman filtering
Ricardo Jiménez-Martínez, Jan Kolodynski, Charikleia Troullinou +3
We study causal waveform estimation (tracking) of time-varying signals in a paradigmatic atomic sensor, an alkali vapor monitored by Faraday rotation probing. We use Kalman filteri…
Sensitivity, quantum limits, and quantum enhancement of noise spectroscopies
Vito Giovanni Lucivero, Aleksandra Dimic, Jia Kong +2
We study the fundamental limits of noise spectroscopy using estimation theory, Faraday rotation probing of an atomic spin system, and squeezed light. We find a simple and general e…
Squeezed-light spin noise spectroscopy
Vito Giovanni Lucivero, Ricardo Jiménez-Martínez, Jia Kong +1
We report quantum enhancement of Faraday rotation spin noise spectroscopy by polarization squeezing of the probe beam. Using natural abundance Rb in 100 Torr of N_2 buffer gas, and…
Long-term laser frequency stabilization using fiber interferometers
Jia Kong, Vito Giovanni Lucivero, Ricardo Jimenez-Martinez +1
We report long-term laser frequency stabilization using only the target laser and a pair of 5 m fiber interferometers, one as a frequency reference and the second as a sensitive th…