Results 11 to 20 of about 1,368,587 (205)

Quantum dynamics of the damped harmonic oscillator [PDF]

open access: yesNew Journal of Physics, 2012
The quantum theory of the damped harmonic oscillator has been a subject of continual investigation since the 1930s. The obstacle to quantization created by the dissipation of energy is usually dealt with by including a discrete set of additional harmonic
T G Philbin
doaj   +10 more sources

Exact Solution of a Time-Dependent Quantum Harmonic Oscillator with Two Frequency Jumps via the Lewis-Riesenfeld Dynamical Invariant Method. [PDF]

open access: yesEntropy (Basel), 2022
Harmonic oscillators with multiple abrupt jumps in their frequencies have been investigated by several authors during the last decades. We investigate the dynamics of a quantum harmonic oscillator with initial frequency $\omega_0$, that undergoes a ...
Coelho SS, Queiroz L, Alves DT.
europepmc   +2 more sources

Unveiling the Damped Quantum Harmonic Oscillator [PDF]

open access: yesJurnal Kumparan Fisika
This article dis cusses the often-overlooked "damped" quantum harmonic oscillator, a vibrating system that loses energy over time. We bridge the classical-quantum divide, starting with the familiar equation of motion for a damped oscillator using Hooke's
Yahya Efendi   +2 more
doaj   +2 more sources

Fingerprints of the quantum space-time in time-dependent quantum mechanics: An emergent geometric phase

open access: yesNuclear Physics B, 2022
We show the emergence of Berry phase in a forced harmonic oscillator system placed in the quantum space-time of Moyal type, where the time ‘t’ is also an operator.
Anwesha Chakraborty   +2 more
doaj   +1 more source

Quantum enhanced metrology in the search for fundamental physical phenomena

open access: yesSciPost Physics Lecture Notes, 2022
These notes summarize lectures given at the 2019 Les Houches summer school on Quantum Information Machines. They describe and review an application of quantum metrology concepts to searches for ultralight dark matter.
Konrad W. Lehnert
doaj   +1 more source

Observation of a kilogram-scale oscillator near its quantum ground state [PDF]

open access: yes, 2009
We introduce a novel cooling technique capable of approaching the quantum ground state of a kilogram-scale system—an interferometric gravitational wave detector.
Diaz, Mario C.   +999 more
core   +3 more sources

Photonic microwave harmonic generator driven by an optoelectronic ring oscillator [PDF]

open access: yes, 2007
We describe a new architecture to generate microwave signals by optical means. Our system combines the advantages of two techniques: frequency multipliers and loop oscillators.
Margarita Varon Duran   +5 more
core   +1 more source

Merging of optoelectronic techniques for microwave signal generation [PDF]

open access: yes, 2007
This paper describes some recent evolutions about optical generation of microwave signals. Among these, multiloop ring oscillator and harmonic generation allow both rise in frequency and wide tunability. Besides, using microresonators and optical sources
Le Kernec, Arnaud   +5 more
core   +1 more source

Tools for Verifying Classical and Quantum Superintegrability [PDF]

open access: yes, 2010
Recently many new classes of integrable systems in n dimensions occurring in classical and quantum mechanics have been shown to admit a functionally independent set of 2n−1 symmetries polynomial in the canonical momenta, so that they are in fact ...
Willard Miller, Jr.   +8 more
core   +1 more source

Classic/Quantum Harmonic Oscillator [PDF]

open access: yes, 2020
A Harmonic Oscillator is an integral part of periodic motion in Classical and Quantum Theory. For systems with small fluctuations near stable points of equilibrium, the Harmonic Oscillator serves as a good approximation for measuring eigenstates and wave
Hitsman, Killian J
core   +1 more source

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