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Nitrogen-Vacancy Ensemble Magnetometry Based on Pump Absorption
Sepehr Ahmadi, Haitham A. R. El-Ella, Adam M. Wojciechowski +4
We demonstrate magnetic field sensing using an ensemble of nitrogen-vacancy centers by recording the variation in the pump-light absorption due to the spin-polarization dependence…
Tomography of a displacement photon counter for discrimination of single-rail optical qubits
Shuro Izumi, Jonas S. Neergaard-Nielsen, Ulrik L. Andersen
We investigate the performance of a Kennedy receiver, which is known as a beneficial tool in optical coherent communications, to the quantum state discrimination of the two superpo…
Pump-Enhanced Continuous-Wave Magnetometry using Nitrogen-Vacancy Ensembles
Sepehr Ahmadi, Haitham A. R. El-Ella, Jørn O. B. Hansen +2
Ensembles of nitrogen-vacancy centers in diamond are a highly promising platform for high-sensitivity magnetometry, whose efficacy is often based on efficiently generating and moni…
Narrow-bandwidth sensing of high-frequency fields with continuous dynamical decoupling
Alexander Stark, Nati Aharon, Thomas Unden +5
State-of-the-art methods for sensing weak AC fields are only efficient in the low frequency domain (< 10 MHz). The inefficiency of sensing high frequency signals is due to the lack…
Deterministic phase measurements exhibiting super-sensitivity and super-resolution
Clemens Schäfermeier, Miroslav Ježek, Lars S. Madsen +2
Phase super-sensitivity is obtained when the sensitivity in a phase measurement goes beyond the quantum shot noise limit, whereas super-resolution is obtained when the interference…