332 citations · 489 across the 17 of their papers we have counts for
12 papers · 1 filter
Observing and evading quantum back-action on a kilogram-scale oscillator
Begüm Kabagöz, Eric Oelker, Dhruva Ganapathy +203
Continuous quantum displacement measurements are fundamentally limited by a trade-off between readout imprecision and measurement back-action, constrained by the Heisenberg uncerta…
A Quantum-Enhanced Feedback Oscillator
Hudson A. Loughlin, Daniel M. DeSantis, Nergis Mavalvala +1
Feedback oscillators, such as lasers and masers, serve as time references in modern computing, communication, and measurement. Quantum fluctuations ultimately limit their phase sta…
Continuum-field quantum optics of frequency comb metrology
Dong-Chel Shin, Edwin Ng, Myoung-Gyun Suh +1
Frequency combs enable precision measurements across timekeeping, spectroscopy, ranging and astronomy, and are now extending to integrated and field-deployable platforms. Realizing…
Completely-positive non-signalling non-Markovian dynamics
Serhii Kryhin, Vivishek Sudhir
We define non-Markovian quantum dynamics as evolution in which the current state depends on all past states, and completely characterize its structure under the assumptions of comp…
Noise-Resilient Quantum Metrology
Hudson A. Loughlin, Melissa A. Guidry, Jacques Ding +7
Quantum metrology seeks to leverage the richness of quantum systems for making better measurements than are possible using only classical resources in order to gain a ``quantum adv…
Wave-particle duality in the measurement of gravitational radiation
Hudson A. Loughlin, Germain Tobar, Evan D. Hall +1
In a consistent description of the quantum measurement process, whether the wave or particle-like aspect of a system is revealed depends on the details of the measurement chain, an…
A Generalized Schawlow-Townes Limit
Hudson A. Loughlin, Vivishek Sudhir
We study a class of a feedback oscillators realized by a phase-insensitive amplifier in positive feedback, where either the amplifier or the feedback element may determine the osci…
Quantum Linear Time-Translation-Invariant Systems: Conjugate Symplectic Structure, Uncertainty Bounds, and Tomography
Jacques Ding, Hudson A. Loughlin, Vivishek Sudhir
Linear time-translation-invariant (LTI) models offer simple, yet powerful, abstractions of complex classical dynamical systems. Quantum versions of such models have so far relied o…
Active laser cooling of a centimeter-scale torsional oscillator
Dong-Chel Shin, Tina M. Hayward, Dylan Fife +2
Experimental tests of gravity's fundamental nature call for mechanical systems in the quantum regime while being sensitive to gravity. Torsion pendula, historically vital in studie…
Scheme for continuous force detection with a single electron at the level of
Dominika Ďurovčíková, Vivishek Sudhir
The detection of weak forces is a central problem in physics and engineering, ranging in importance from fundamental pursuits such as precision tests of gravity, gravitational-wave…
Exceptional-point Sensors Offer No Fundamental Signal-to-Noise Ratio Enhancement
Hudson A. Loughlin, Vivishek Sudhir
Exceptional-point (EP) sensors are characterized by a square-root resonant frequency bifurcation in response to an external perturbation. This has lead numerous suggestions for usi…
Measurement and control of a mechanical oscillator at its thermal decoherence rate
D. J. Wilson, V. Sudhir, N. Piro +3
In real-time quantum feedback protocols, the record of a continuous measurement is used to stabilize a desired quantum state. Recent years have seen highly successful applications…