Thermometry of Trapped Ions Based on Bichromatic Driving
arXiv:2407.15182 · doi:10.1103/PhysRevApplied.22.064022
Abstract
Accurate thermometry of laser-cooled ions is crucial for the performance of the trapped-ions quantum computing platform. However, most existing methods face a computational exponential bottleneck. Recently, a thermometry method based on bichromatic driving was theoretically proposed by Ivan Vybornyi et al. to overcome this obstacle, which allows the computational complexity to remain constant with the increase of ion numbers. In this paper, we provide a detailed statistical analysis of this method and prove its robustness to several imperfect experimental conditions using Floquet theory. We then experimentally verify its good performance on a linear segmented surface-electrode ion trap platform for the first time. This method is proven to be effective from near the motional ground state to a few mean phonon numbers. Our theoretical analysis and experimental verification demonstrate that the scheme can accurately and efficiently measure the temperature in ion crystals.
References in corpus (11)
- Periodically-driven quantum systems: Effective Hamiltonians and engineered gauge fields
- Experimental Test of Quantum Jarzynski Equality with a Trapped Ion System
- Brillouin-Wigner theory for high-frequency expansion in periodically driven systems: Application to Floquet topological insulators
- Integrated optical multi-ion quantum logic
- Integrated optical addressing of an ion qubit
- Sensing Atomic Motion from the Zero Point to Room Temperature with Ultrafast Atom Interferometry
- Optimized pulsed sideband cooling and enhanced thermometry of trapped ions
- Quantum Thermometry with Trapped Ions
- Adiabatic Sensing Technique for Optimal Temperature Estimation using Trapped Ions
- Sideband thermometry of ion crystals
- Phonon Number Measurement Using Optimal Composite Pulses