332 citations · 489 across the 17 of their papers we have counts for
18 papers
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…
Forecasting in the presence of scale-free noise
Serhii Kryhin, Tatiana Mouzykantskii, Vivishek Sudhir
The extraction of signals from noise is a common problem in all areas of science and engineering. A particularly useful version is that of forecasting: determining a causal filter…
Thermality and athermality in the Unruh effect
D. Jaffino Stargen, Vivishek Sudhir
In idealized treatments of the Unruh effect, a two-level atom is accelerated in a prescribed classical trajectory through the vacuum of a quantum field -- the Unruh bath -- which c…
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…
Temperature stabilization of a lab space at -level over a day
Dylan Fife, Dong-Chel Shin, Vivishek Sudhir
Temperature fluctuations over long time scales () are an insidious problem for precision measurements. In optical laboratories, the primary effect of tempera…
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…
Distinguishable consequence of classical gravity on quantum matter
Serhii Kryhin, Vivishek Sudhir
What if gravity is classical? If true, a consistent co-existence of classical gravity and quantum matter requires that gravity exhibit irreducible fluctuations. These fluctuations…
Relativistic coupling of phase and amplitude noise in optical interferometry
Vivishek Sudhir, Peter Fritschel, Nergis Mavalvala
Extraneous motion of optical elements in an interferometer lead to excess noise. Typically, fluctuations in the effective path length lead to phase noise, while beam-pointing leads…
Near-field integration of a SiN nanobeam and a SiO microcavity for Heisenberg-limited displacement sensing
Ryan Schilling, Hendrik Schütz, Amir Ghadimi +3
Placing a nanomechanical object in the evanescent near-field of a high- optical microcavity gives access to strong gradient forces and quantum-noise-limited displacement readout…
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…