A5020197582- Atomic and Subatomic Physics Research
- Advanced Thermodynamics and Statistical Mechanics
- Diamond and Carbon-based Materials Research
- NMR spectroscopy and applications
- Quantum Mechanics and Applications
- Mechanical and Optical Resonators
- Advanced NMR Techniques and Applications
- Neural Networks and Applications
- High-pressure geophysics and materials
- Force Microscopy Techniques and Applications
- Fault Detection and Control Systems
- Analytical Chemistry and Sensors
- Quantum Information and Cryptography
- Distributed Sensor Networks and Detection Algorithms
- Thermal properties of materials
- Quantum Electrodynamics and Casimir Effect
Center for Integrated Quantum Science and Technology
2021-2023
University of Florence
2021-2022
Abstract The experimental verification of quantum fluctuation relations for driven open system is currently a challenge, due to the conceptual and operative difficulty distinguishing work heat. nitrogen-vacancy (NV) center in diamond has been recently proposed as controlled test bed study presence an engineered dissipative channel, absence (Hernández-Gómez et al 2020 Phys. Rev. Res. 2 023327). Here, we extend those studies exploring validity driven-dissipative scenario, where spin exchanges...
Engineered dynamical maps combining coherent and dissipative transformations of quantum states with measurements, have demonstrated a number technological applications, promise to be crucial tool in thermodynamic processes. Here, we exploit the control on effective open spin qutrit dynamics an NV center, experimentally realize autonomous feedback process (Maxwell demon) tunable strength. The is enabled by random measurement events that condition subsequent evolution qutrit. efficacy Maxwell...
We propose and demonstrate experimentally continuous phased dynamical decoupling (CPDD), where we apply a field with discrete phase changes for quantum sensing robust compensation of environmental amplitude noise. CPDD does not use short pulses, making it particularly suitable experiments limited driving power or nuclear magnetic resonance at high fields. It requires control the timing changes, offering much greater precision than Rabi frequency needed in standard schemes. successfully our...
Classical sensors for spectrum analysis are widely used but lack micro- or nanoscale spatial resolution. On the other hand, quantum sensors, capable of working with precision, do not provide precise frequency resolution over a wide range frequencies. Using single spin in diamond, we present measurement protocol probes which enables full signal reconstruction on up to potentially 100\,GHz. We achieve $58\,\mathrm{nT/\sqrt{Hz}}$ amplitude and $0.095\,\mathrm{rad/\sqrt{Hz}}$ phase sensitivity...
Abstract Precise frequency measurements are important in applications ranging from navigation and imaging to computation communication. Here we outline the optimal quantum strategies for discrimination estimation context of spectroscopy, compare effectiveness different readout strategies. Using a single NV center diamond, implement protocol discriminate two frequencies separated by 2 kHz with 44 μs measurement, factor ten below Fourier limit. For estimation, achieve sensitivity 1.6 µHz/Hz...
Diffusion noise represents a major constraint to successful liquid state nano-NMR spectroscopy. Using the Fisher information as faithful measure, we theoretically calculate and experimentally show that phase sensitive protocols are superior in most experimental scenarios, they maximize extraction from correlations sample. We derive optimal parameters for quantum heterodyne detection (Qdyne) present accurate statistically polarized Qdyne experiments date, leading way resolve chemical shifts...
Abstract Diffusion noise is a major source of spectral line broadening in liquid state nano-scale nuclear magnetic resonance with shallow nitrogen-vacancy centres, whose main consequence limited resolution. This limitation arises by virtue the widely accepted assumption that spin signal correlations decay exponentially nano-NMR. However, more accurate analysis diffusion shows survive for longer time due to power-law scaling, yielding possibility improved resolution and altering our...
We propose and demonstrate experimentally continuous phased dynamical decoupling (CPDD), where we apply a field with discrete phase changes for quantum sensing robust compensation of environmental amplitude noise. CPDD does not use short pulses, making it particularly suitable experiments limited driving power or nuclear magnetic resonance at high fields. It requires control the timing changes, offering much greater precision than Rabi frequency needed in standard schemes. successfully our...
Diffusion noise represents a major constraint to successful liquid state nano-NMR spectroscopy. Using the Fisher information as faithful measure, we theoretically calculate and experimentally show that phase sensitive protocols are superior in most experimental scenarios, they maximize extraction from correlations sample. We derive optimal parameters for quantum heterodyne detection (Qdyne) present accurate statistically polarized Qdyne experiments date, leading way resolve chemical shifts...