Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 118 for “"Squeezing"”.
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Squeezing in optical fibers
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1996.
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Soliton squeezing in optical fibers
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, February 2001.
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Geometric Squeezing of a Degenerate Fermi Gas
… the new apparatus. The procedure of geometric squeezing utilizes a rotating, elliptical harmonic trap to realize the squeezing Hamiltonian for guiding center motion. We first outline the observation of a geometrically squeezed state of a rapidly-rotating Bose-Einstein condensate entering the …
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Spin-squeezing of ⁸⁷Rb via optical measurement
… measurement uncertainty in atomic clocks by squeezing the collective spin of atoms. Spin-squeezing reduces noise below the standard quantum limit where precision scales as 1/ [square root of] N, allowing us to instead approach the Heisenberg limit where it scales as 1/N. We report …
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Squeezing collective atomic spins with an optical resonator
… achieving metrologically relevant squeezing of 1.5(5) dB and 4.6(6) dB respectively, and simple analytical models, including the effects of scattering into free space, show that much greater squeezing is realistically achievable. To demonstrate the potential usefulness of such …
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Squeezing the most benefit from network parallelism in datacenters
One big non-blocking switch is one of the most powerful and pervasive abstractions in datacenter networking. As Moore's law begins to wane, using parallelism to scale out processing units, vs. scale them up, is becoming exceedingly popular. The one-big-switch abstraction, for example, is typically …
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Enhanced squeezing in homodyne detection via local-oscillator optimization
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Cavity-enabled spin squeezing for a quantum-enhanced atomic clock
… spin state. I demonstrate 3.0(8) dB of spin squeezing by this method of quantum non-demolition measurement. I further introduce a new method, cavity feedback squeezing, which uses the light field circulating in the resonator to mediate an effective interaction among the atoms. The …
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Squeezing the Quantum Noise of LIGO below the Standard Quantum Limit
… through squeezed light, a technique called squeezing (Chapter 2), can circumvent this limit. Squeezed vacuum, a non-classical light state, exploits quantum correlations between photon pairs to reduce vacuum fluctuations in one quadrature at the cost of another. By manipulating the quantum …
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Conditional Mechanical Squeezing of a Micromechanical Oscillator Approaching the Quantum Regime
Optomechanics is a rapidly developing field studying systems with optical and mechanical resonators coupled via radiation pressure. This coupling plays a key role in precision displacement and momentum sensing like in gravitational wave detection and atomic force microscopy. Recently the field has …
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Mode Matching sensing in Frequency Dependent Squeezing Source for Advanced Virgo plus
… also possible due to the Frequency Independent Squeezing (FIS) implementation, which improved the Virgo detection range for the coalescence between two Binary Neutron Start (BNS) of 5-8\%. However, this incredible result was dramatically limited by different technical issues, among which the …
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A partial "squeezing theorem" for a particular class of many-valued logics
1 PDF file (v, 98 pages)
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Cell squeezing : a vector-free microfluidic platform for intracellular delivery of macromolecules
… carbon nanotubes, and small molecules. Our cell squeezing technology has further illustrated its enabling potential in a number of applications detailed herein. Quantum dots are a promising alternative to organic fluorescent dyes due to their superior spectral properties and stability. These …
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Towards spin squeezed ¹⁷¹Yb atomic clock beyond the standard quantum limit
… projection noise, which can be overcome by spin squeezing. We constructed an apparatus to perform spin squeezing on an ytterbium optical lattice clock to demonstrate the enhancement of clock stability by spin squeezing. Using the spin 1/2 system of the ground state Zeeman sublevels of 171Yb, two …
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Quantum noise propagation in nonlinear optical media
… In the second part a specific model for squeezing in fiber is developed from the general QMPM. Dispersion, linear loss, Raman scattering, forward Brillouin scattering (GAWBS), and two-photon absorption are incorporated into the model, which is linearized and solved for the continuous-wave …
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Squeezed Vacuum Injection in Advanced LIGO: Enhancing Gravitational-Wave Detection Using Quantum States of Light
… Run O3, from April 1st, 2019 to March 27, 2020, squeezing improved the sensitivity of the LIGO interferometers to gravitational-wave signals above 50 Hz by up to 3 dB, increasing the expected detection rate by 40%-50%. This achievement is the culmination of decades of research to implement …
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Nonlinear dispersive equations with random initial data
… for arbitrary initial data. We prove several non-squeezing results: a local in time result and a conditional result which states that uniform bounds on the Strichartz norms of solutions for initial data in bounded subsets of the phase space implies global-in-time non-squeezing. As a consequence of …
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Quantum noise reduction using squeezed states in LIGO
… above 200 Hz, and possibly the first time that squeezing has been measured in an interferometer at frequencies below 700 Hz. The possibility that injection of squeezed states could introduce environmental noise couplings that would degrade the crucial but fragile low frequency sensitivity of a …
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Numerical Modeling Methodology for Weak Rock Masses in Nevada gold mines
… dependent criterion is considered for predicting squeezing instability in the numerical model at the end of 4-year period. Over 200 numerical models were developed as a part of this study for studying the effect of various rock parameters, joint parameters, support design parameters, excavation …
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Cavity quantum electrodynamics with ensembles of ytterbium-171
… probing light on the atomic ensemble, we perform squeezing by cavity feedback. We produce states with -11±1 dB of variance squeezing and 14±1 dB of anti squeezing. Using theoretical simulations, we show that states with near-unitary squeezing offer significant advantages for improving atomic …
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