Squeezed-light spin noise spectroscopy

Abstract

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 squeezed light from a sub-threshold optical parametric oscillator stabilized 20 GHz to the blue of the D_1 resonance, we observe that an input squeezing of 3.0 dB improves the signal-to-noise ratio by 1.5 dB to 2.6 dB over the combined (power)$\otimes$(number density) ranges (0.5 mW to 4.0 mW )$\otimes$(1.5 x 10^{12} cm^{-3} to 1.3 x 10^{13} cm^{-3}), covering the ranges used in optimized spin noise spectroscopy experiments. We also show that squeezing improves the trade-off between statistical sensitivity and broadening effects, a previously unobserved quantum advantage.

7 pages, 6 figures

References in corpus (9)

• Squeezed-Light Optical Magnetometry
• Semiconductor Spin Noise Spectroscopy: Fundamentals, Accomplishments, and Challenges
• Quantum Noise Locking
• The role of spin noise in the detection of nanoscale ensembles of nuclear spins
• Two-color spin noise spectroscopy: Using spin fluctuation correlations to reveal homogeneous linewidths within quantum dot ensembles
• Spin noise spectroscopy beyond thermal equilibrium and linear response
• Rubidium resonant squeezed light from a diode-pumped optical-parametric oscillator
• Interferometric measurement of the biphoton wave function
• Excess optical quantum noise in atomic sensors

Cited by in corpus (39)

• The Theory of Spin Noise Spectroscopy: A Review
• Measurement-induced nonlocal entanglement in a hot, strongly-interacting atomic system
• Magnetic resonance with squeezed microwaves
• Femtotesla direct magnetic gradiometer using a single multipass cell
• Overcoming detection loss and noise in squeezing-based optical sensing
• Signal tracking beyond the time resolution of an atomic sensor by Kalman filtering
• Femtotesla nearly quantum-noise-limited pulsed gradiometer at Earth-scale fields
• Mechanical EPR entanglement with a finite-bandwidth squeezed reservoir
• Practical quantum metrology with large precision gains in the low photon number regime
• Suppression of Stokes scattering and improved optomechanical cooling with squeezed light
• Quantum Dynamics of Collective Spin States in a Thermal Gas
• Site-resolved imaging of single atoms with a Faraday quantum gas microscope
• Correlation function of spin noise due to atomic diffusion
• Laser-written vapor cells for chip-scale atomic sensing and spectroscopy
• Quantum-enhanced rubidium atomic magnetometer based on Faraday rotation via 795-nm Stokes operator squeezed light
• Effects of spin-exchange collisions on the fluctuation spectra of hot alkali-metal vapors
• Sensitivity, quantum limits, and quantum enhancement of noise spectroscopies
• Increased sensitivity of spin noise spectroscopy using homodyne detection in $n$-doped GaAs
• Measurements of spin properties of atomic systems in and out of equilibrium via noise spectroscopy
• Quantum-enhanced magnetometry at optimal number density
• Non-Gaussian distribution of collective operators in quantum spin chains
• Optical amplification of spin noise spectroscopy via homodyne detection
• Quantum-limited biochemical magnetometers designed using the Fisher information and quantum reaction control
• Inter-species spin-noise correlations in hot atomic vapors
• Spin noise spectroscopy of an alignment-based atomic magnetometer
• Number-unconstrained quantum sensing
• Enhancement of spin noise spectroscopy of rubidium atomic ensemble by using of the polarization squeezed light
• Quantum trajectories in spin-exchange collisions reveal the nature of spin-noise correlations in multi-species alkali vapors
• Anomalous noise spectra in a spin-exchange-relaxation-free alkali-metal vapor
• Birefringence and dichroism effects in the spin noise spectra of a spin-1 system
• Magneto Optical Sensing beyond the Shot Noise Limit
• Atom-resonant squeezed light from a tunable monolithic ppRKTP parametric amplifier
• Optical reconstruction of collective density matrix of qutrit
• A real time digital receiver for correlation measurements in atomic systems
• Relaxation of an ensemble of two-level emitters in a squeezed bath
• Direct Measurement of Higher-Order Nonlinear Polarization Squeezing
• Squeezed-light enhancement and backaction evasion in a high sensitivity optically pumped magnetometer
• Steady-state dynamics of quantum frequency combs in microring resonators
• Optimal and efficient inference tools for field tracking with precessing spins