Enhanced magnetic sensitivity with non-gaussian quantum fluctuations
arXiv:1901.06282 · doi:10.1103/PhysRevLett.122.173601
Abstract
The precision of a quantum sensor can overcome its classical counterpart when its constituents are entangled. In gaussian squeezed states, quantum correlations lead to a reduction of the quantum projection noise below the shot noise limit. However, the most sensitive states involve complex non-gaussian quantum fluctuations, making the required measurement protocol challenging. Here we measure the sensitivity of non-classical states of the electronic spin of dysprosium atoms, created using light-induced non-linear spin coupling. Magnetic sublevel resolution enables us to reach the optimal sensitivity of non-gaussian (oversqueezed) states, well above the capability of squeezed states and about half the Heisenberg limit.
10 pages, 9 figures
References in corpus (34)
- Quantum sensing
- Advances in Quantum Metrology
- Quantum metrology with nonclassical states of atomic ensembles
- Multi-photon entanglement and interferometry
- 14-qubit entanglement: creation and coherence
- Many-particle entanglement with Bose--Einstein condensates
- Atom chip based generation of entanglement for quantum metrology
- Squeezing and entanglement in a Bose-Einstein condensate
- Negativity of the Wigner function as an indicator of nonclassicality
- Entanglement-free Heisenberg-limited phase estimation
- Quantum spin dynamics and entanglement generation with hundreds of trapped ions
- Implementation of Cavity Squeezing of a Collective Atomic Spin
- Twin matter waves for interferometry beyond the classical limit
- Fisher Information and entanglement of non-Gaussian spin states
- Mesoscopic atomic entanglement for precision measurements beyond the standard quantum limit
- Sub-Planck spots of Schroedinger cats and quantum decoherence
- 'Designer atoms' for quantum metrology
- Spin-Nematic Squeezed Vacuum in a Quantum Gas
- Deterministic entanglement generation from driving through quantum phase transitions
- Approaching the Heisenberg limit without single-particle detection
- Quantum-Enhanced Sensing Based on Time Reversal of Nonlinear Dynamics
- Twin-atom beams
- Reduced back-action for phase sensitivity 10 times beyond the standard quantum limit
- Optimal and Robust Quantum Metrology Using Interaction-Based Readouts
- Continuous Weak Measurement and Nonlinear Dynamics in a Cold Spin Ensemble
- Quantum-enhanced sensing using non-classical spin states of a highly magnetic atom
- Metrological Nonlinear Squeezing Parameter
- Spin tomography
- Accurate Atom Counting in Mesoscopic Ensembles
- Strong Quantum Spin Correlations Observed in Atomic Spin Mixing
- Sub-Poissonian number differences in four-wave mixing of matter waves
- Collective state measurement of mesoscopic ensembles with single-atom resolution
- Representation of Berry phase by the trajectories of Majorana stars
- Anisotropic light-shift and magic-polarization of the intercombination line of Dysprosium atoms in a far-detuned dipole trap
Cited by in corpus (26)
- Dipolar physics: A review of experiments with magnetic quantum gases
- Single-atom quantum probes for ultracold gases using nonequilibrium spin dynamics
- Collective Spin-Light and Light-Mediated Spin-Spin Interactions in an Optical Cavity
- One- and two-axis squeezing via laser coupling in an atomic Fermi-Hubbard model
- Strong Spin Squeezing Induced by Weak Squeezing of Light inside a Cavity
- Probing quantum criticality and symmetry breaking at the microscopic level
- Accelerating many-body entanglement generation by dipolar interactions in the Bose-Hubbard model
- Threshold for a discrete-variable sensor of quantum reservoirs
- Floquet engineering of optical nonlinearities: a quantum many-body approach
- Floquet-engineered nonlinearities and controllable pair-hopping processes: From optical Kerr cavities to correlated quantum matter
- Continuous-variable quantum sensing of a dissipative reservoir
- Generation of spin squeezing via a fully quantum degenerate parametric amplifier
- Spin qudit tomography and state reconstruction error
- Efficient formulation of multitime generalized quantum master equations: Taming the cost of simulating 2D spectra
- Detecting Einstein-Podolsky-Rosen steering in non-Gaussian spin states from conditional spin-squeezing parameters
- Measurement of the dynamic polarizability of Dy atoms near the 626-nm intercombination line
- Cyclic nonlinear interferometry with entangled non-Gaussian spin states
- Exploring spin-squeezing in the Mott insulating regime: role of anisotropy, inhomogeneity and hole doping
- Coherent control over the high-dimensional space of the nuclear spin of alkaline-earth atoms
- Multimode N00N states in driven atomtronic circuits
- Generalized squeezing as a witness
- Quantum Metrology via Floquet-Engineered Two-axis Twisting and Turn Dynamics
- Cat-state-like non-Gaussian entanglement in magnon systems
- Gaussian theory for estimating fluctuating perturbations with back action evasive oscillator variables
- Coherent Generation and Protection of Anticoherent Spin States
- Scaling laws for the sensitivity enhancement of non-Gaussian spin states