375 citations · 762 across the 28 of their papers we have counts for
28 papers
Detection methods for optimal target reflectivity estimation with two-mode squeezed vacuum probes
Harel Radia, Tuvia Gefen, Nadav Katz
Target reflectivity estimation using a two-mode squeezed vacuum (TMSV) probe offers a theoretical advantage over classical schemes, but realizing this potential under the measureme…
Gaussian Quantum Metrology with Realistic Linear Sensors
Jacques Ding, James W. Gardner, Tuvia Gefen +1
Quantum sensing promises enhanced precision, but the usual quantum Cramer Rao bound can be too optimistic for realistic linear sensors, where squeezing, filtering, and loss reshape…
Stochastic signal sensing with finite energy and dead time at the fundamental quantum limit
James W. Gardner, Tuvia Gefen, Matteo Fadel
State preparation, measurement, and reset operations take finite time and use finite energy in realistic experiments, yet the impact of this on optimal quantum metrological protoco…
Optimal quantum metrology protocols with erasure qubits
Michal Arieli, Alex Retzker, Tuvia Gefen
We investigate the precision limits and optimal protocols for sensing single qubit signals in the presence of erasure noise. We study a hierarchy of precision limits achievable wit…
Quantum superresolution and noise spectroscopy with quantum computing
James W. Gardner, Federico Belliardo, Gideon Lee +2
Quantum metrology of an incoherent signal is a canonical sensing problem related to superresolution and noise spectroscopy. We show that quantum computing can accelerate searches f…
Extending the dynamic range in quantum frequency estimation with sequential weak measurements
Su Direkci, Manuel Endres, Tuvia Gefen
Quantum metrology explores optimal quantum protocols for parameter estimation. In the context of optical atomic clocks, conventional protocols focus on optimal input states and mea…
Bayesian frequency estimation at the fundamental quantum limit
James W. Gardner, Tuvia Gefen, Ethan Payne +6
Searching for a weak signal at an unknown frequency is a canonical task in experiments probing fundamental physics such as gravitational-wave observatories and ultra-light dark mat…
Heisenberg-limited Hamiltonian learning continuous variable systems via engineered dissipation
Tim Möbus, Andreas Bluhm, Tuvia Gefen +3
Discrete and continuous variables oftentimes require different treatments in many learning tasks. Identifying the Hamiltonian governing the evolution of a quantum system is a funda…
Lindblad estimation with fast and precise quantum control
James W. Gardner, Simon A. Haine, Joseph J. Hope +2
Enhancing precision sensors for stochastic signals using quantum techniques is a promising emerging field of physics. Estimating a weak stochastic waveform is the core task of many…
Heisenberg-limited Bayesian phase estimation with low-depth digital quantum circuits
Su Direkci, Ran Finkelstein, Manuel Endres +1
Optimal phase estimation protocols require complex state preparation and readout schemes, generally unavailable or unscalable in many quantum platforms. We develop and analyze a sc…
Stochastic waveform estimation at the fundamental quantum limit
James W. Gardner, Tuvia Gefen, Simon A. Haine +4
Although measuring the deterministic waveform of a weak classical force is a well-studied problem, estimating a random waveform, such as the spectral density of a stochastic signal…
Universal quantum operations and ancilla-based readout for tweezer clocks
Ran Finkelstein, Richard Bing-Shiun Tsai, Xiangkai Sun +6
Enhancing the precision of measurements by harnessing entanglement is a long-sought goal in the field of quantum metrology. Yet attaining the best sensitivity allowed by quantum th…
Achieving the fundamental quantum limit of linear waveform estimation
James W. Gardner, Tuvia Gefen, Simon A. Haine +2
Sensing a classical signal using a linear quantum device is a pervasive application of quantum-enhanced measurement. The fundamental precision limits of linear waveform estimation,…
Heisenberg-limited Hamiltonian learning for interacting bosons
Haoya Li, Yu Tong, Hongkang Ni +2
We develop a protocol for learning a class of interacting bosonic Hamiltonians from dynamics with Heisenberg-limited scaling. For Hamiltonians with an underlying bounded-degree gra…
Optimal protocols for quantum metrology with noisy measurements
Sisi Zhou, Spyridon Michalakis, Tuvia Gefen
Measurement noise is a major source of noise in quantum metrology. Here, we explore preprocessing protocols that apply quantum controls to the quantum sensor state prior to the fin…
Quantum precision limits of displacement noise free interferometers
Tuvia Gefen, Rajashik Tarafder, Rana X. Adhikari +1
Current laser-interferometric gravitational wave detectors suffer from a fundamental limit to their precision due to the displacement noise of optical elements contributed by vario…
Correlation spectroscopy with multi-qubit-enhanced phase estimation
H. Hainzer, D. Kiesenhofer, T. Ollikainen +7
Ramsey interferometry is a widely used tool for precisely measuring transition frequencies between two energy levels of a quantum system, with applications in time-keeping, precisi…
Quantum metrology with imperfect measurements
Yink Loong Len, Tuvia Gefen, Alex Retzker +1
The impact of measurement imperfections on quantum metrology protocols has not been approached in a systematic manner so far. In this work, we tackle this issue by generalising fir…
On the robustness of the NV-NMR spectrometer setup to magnetic field inhomogeneities
Yotam Vaknin, Benedikt Tratzmiller, Tuvia Gefen +3
The NV-NMR spectrometer is a promising candidate for detection of NMR signals at the nano scale. Field inhomogeneities, however, are a major source of noise that limits spectral re…
Achieving the ultimate precision limit in quantum NMR spectroscopy
Daniel Cohen, Tuvia Gefen, Laura Ortiz +1
The ultimate precision limit in estimating the Larmor frequency of unentangled rotating spins is well established, and is highly important for magnetometers, gyroscopes and man…
Overcoming resolution limits with quantum sensing
Tuvia Gefen, Amit Rotem, Alex Retzker
The field of quantum sensing explores the use of quantum phenomena to measure a broad range of physical quantities, of both static and time-dependent types. An important figure of…
Limits on Spectral Resolution Measurements by Quantum Probes
Amit Rotem, Tuvia Gefen, Santiago Oviedo-Casado +6
The limits of frequency resolution in nano-NMR experiments have been discussed extensively in recent years. It is believed that there is a crucial difference between the ability to…
Sub-millihertz magnetic spectroscopy with a nanoscale quantum sensor
Simon Schmitt, Tuvia Gefen, Felix M. Stürner +13
Precise timekeeping is critical to metrology, forming the basis by which standards of time, length and fundamental constants are determined. Stable clocks are particularly valuable…
Control methods for improved Fisher information with quantum sensing
Tuvia Gefen, Fedor Jelezko, Alex Retzker
Recently new approaches for sensing the frequency of time dependent Hamiltonians have been presented, and it was shown that the optimal Fisher information scales as We pre…