Certified quantum non-demolition measurement of material systems
arXiv:1203.6584 · doi:10.1088/1367-2630/14/8/085021
Abstract
An extensive debate on quantum non-demolition (QND) measurement, reviewed in Grangier et al. [Nature, {\bf 396}, 537 (1998)], finds that true QND measurements must have both non-classical state-preparation capability and non-classical information-damage tradeoff. Existing figures of merit for these non-classicality criteria require direct measurement of the signal variable and are thus difficult to apply to optically-probed material systems. Here we describe a method to demonstrate both criteria without need for to direct signal measurements. Using a covariance matrix formalism and a general noise model, we compute meter observables for QND measurement triples, which suffice to compute all QND figures of merit. The result will allow certified QND measurement of atomic spin ensembles using existing techniques.
11 pages, zero figures
References in corpus (12)
- Mesoscopic atomic entanglement for precision measurements beyond the standard quantum limit
- States of an Ensemble of Two-Level Atoms with Reduced Quantum Uncertainty
- Conditional Spin-Squeezing of a Large Ensemble via the Vacuum Rabi Splitting
- Spin squeezing of a cold atomic ensemble with the nuclear spin of one-half
- Spin squeezing and precision probing with light and samples of atoms in the gaussian approximation
- Squeezing of a nanomechanical resonator by quantum nondemolition measurement and feedback
- Quantum Non-demolition Measurements on Qubits
- QND Measurement of Large-Spin Ensembles by Dynamical Decoupling
- Polarization-based Light-Atom Quantum Interface with an All-optical Trap
- Non-Destructive Probing of Rabi Oscillations on the Cesium Clock Transition near the Standard Quantum Limit
- Generation of macroscopic singlet states in atomic ensembles
- Hamiltonian Design in Atom-Light Interactions with Rubidium Ensembles: A Quantum Information Toolbox
Cited by in corpus (5)
- Certified quantum non-demolition measurement of a macroscopic material system
- Quantum non-demolition measurement enables macroscopic Leggett-Garg tests
- Entanglement-enhanced radio-frequency field detection and waveform sensing
- Entanglement-enhanced phase estimation without prior phase information
- Spin Squeezing, Macrorealism and the Heisenberg uncertainty principle