Results 71 to 80 of about 30,784 (218)
Quantum Nondemolition Measurement of a Nonclassical State of a Massive Object
Physical Review X, 2015 By coupling a macroscopic mechanical oscillator to two microwave cavities, we simultaneously prepare and monitor a nonclassical steady state of mechanical motion.
F. Lecocq +4 more
doaj +1 more source
Coherent Cancellation of Backaction Noise in optomechanical Force Measurements [PDF]
, 2014 Optomechanical detectors have reached the standard quantum limit in position and force sensing where measurement backaction noise starts to be the limiting factor for the sensitivity.
Hammerer, Klemens +3 more
core +3 more sources
Nanophotonics, Volume 15, Issue 5, 16 March 2026.A CMOS‐compatible silicon‐photonic 4 × 4 coherent receiver array spatially samples turbulence‐distorted wavefronts and, with maximum‐ratio combining, enables signal recovery. Experimental BPSK tests under moderate turbulence approach theoretical combining efficiency, reducing BER from 1E‐2 to 1E‐15.
Alireza Fardoost +7 more
wiley +1 more source
Detection of weak stochastic force in a parametrically stabilized micro opto-mechanical system
, 2013 Measuring a weak force is an important task for micro-mechanical systems, both when using devices as sensitive detectors and, particularly, in experiments of quantum mechanics.
Bonaldi, M. +7 more
core +2 more sources
The effect of AM noise on correlation phase noise measurements [PDF]
, 2006 We analyze the phase-noise measurement methods in which correlation and averaging is used to reject the background noise of the instrument. All the known methods make use of a mixer, used either as a saturated phase detector or as a linear synchronous ...
Boudot, Rodolphe, Rubiola, Enrico
core +3 more sources
A self-correcting quadrature voltage controlled oscillator
IEICE Electronics Express, 2014 A self-correcting quadrature voltage controlled oscillator (QVCO) with phase correcting loop is proposed. It comprises the QVCO core and phase correcting loop, which corrects the quadrature phase error. Two LC VCOs, buffers, and phase shifters are coupled in circular configuration to achieve IQ symmetry. This paper introduces the idea of realizing QVCO
Tomoyuki Arai, Ali Hajimiri
openaire +3 more sources
C∞‐Structures for Liénard Equations and New Exact Solutions to a Class of Klein–Gordon Equations
Mathematical Methods in the Applied Sciences, Volume 49, Issue 4, Page 2795-2822, 15 March 2026.ABSTRACT Liénard equations are analyzed using the recent theory of 𝒞∞‐structures. For each Liénard equation, a 𝒞∞‐structure is determined by using a Lie point symmetry and a 𝒞∞‐symmetry. Based on this approach, a novel method for integrating these equations is proposed, which consists in solving sequentially two completely integrable Pfaffian equations.
Beltrán de la Flor +2 more
wiley +1 more source
Quantum backaction evading measurements of a silicon nitride membrane resonator
New Journal of Physics, 2022 Quantum backaction disturbs the measurement of the position of a mechanical oscillator by introducing additional fluctuations. In a quantum backaction measurement technique, the backaction can be evaded, although at the cost of losing part of the ...
Yulong Liu +3 more
doaj +1 more source
Unbalanced quadriphase demodulator [PDF]
, 1977 A new and improved apparatus and method are described for demodulation of quaternary phase shift keyed (QPSK) data, particularly unbalanced QPSK. Phase adjustment of the output of a phase locked loop local oscillator is performed to reduce sensitivity to
Bradfield, S. P., III, Koybayashi, H. S.
core +1 more source
Current‐Limiting Control Strategies in Variable Capacitance Electrostatic Energy Harvesters
Advanced Intelligent Systems, Volume 8, Issue 3, March 2026.This work introduces control strategies for electrostatic energy harvesters that balance energy yield with current limitations. Two approaches are explored: traditional peak‐triggered controls, and newly developed quadrature controls, which use smooth voltage profiles.
Alireza Jalaliankhakshour +4 more
wiley +1 more source