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Filters
Notch filters for port-Hamiltonian systems
2012
2012 American Control Conference (ACC)
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In this paper a standard notch filter is modeled in the port-Hamiltonian framework. By having such a port-Hamiltonian description it is proven that the notch filter is a passive system. ...
The notch filter can then be interconnected with another (nonlinear) port-Hamiltonian system, while preserving the overall passivity property. ...
This paper describes a standard notch filter in the port-Hamiltonian form. ...
doi:10.1109/acc.2012.6315150
fatcat:dmgytu6e4je7dian24clb3q6wu
Notch Filters for Port-Hamiltonian Systems
2015
IEEE Transactions on Automatic Control
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In this paper a standard notch filter is modeled in the port-Hamiltonian framework. By having such a port-Hamiltonian description it is proven that the notch filter is a passive system. ...
The notch filter can then be interconnected with another (nonlinear) port-Hamiltonian system, while preserving the overall passivity property. ...
This paper describes a standard notch filter in the port-Hamiltonian form. ...
doi:10.1109/tac.2015.2390552
fatcat:o4ccpkngjnhuvi7ctesnnbgazy
Experimental study of a subsystem in an entangled two-photon state
1999
Physical Review A. Atomic, Molecular, and Optical Physics
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, that is, obtaining mixed states out of pure states in a Hamiltonian system. ...
The zero entropy condition for a system in a pure state reflects the fact that the quantum state ͉⌿͘ provides a complete description of the system. ...
doi:10.1103/physreva.60.2685
fatcat:xht73zq7ozfmzdjqeuysppd7dq
A Cooper-Pair Box Coupled to Two Resonators: An Architecture for a Quantum Refrigerator
[article]
2022
arXiv
pre-print
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We thank VTT Technical Research Center for sputtered Nb films. ...
Neill Lambert and Ilari Mäkinen for technical support and insightful discussions. This work is financially supported through the Foundational Questions Institute Fund (FQXi) via Grant No. ...
(c) Transmission spectra, S21, between port 1 and port 2 for driving freqencies f drive 0.1-14 GHz. ...
arXiv:2109.03023v2
fatcat:zy4daxvv6bccreuvkcr7qymr7a
Quality factor of a transmission line coupled coplanar waveguide resonator
2018
EPJ Quantum Technology
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The obtained analytical results are relevant for designing circuit-QED quantum systems and frequency division multiplexing of superconducting bolometers, detectors and similar microwave-range multi-pixel ...
Leading order terms for the external quality factor and frequency shift are calculated. ...
Ustinov for sharing his comments on an early version of the manuscript, and V. Chichkov, G. Fedorov, I. ...
doi:10.1140/epjqt/s40507-018-0066-3
fatcat:rqq7uuog5fasdicrns7ohdbxze
Topologically Protecting Squeezed Light on a Photonic Chip
[article]
2021
arXiv
pre-print
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For the construction of large-scale quantum systems performing many-photon operations, it is essential to integrate various functional modules on a chip. ...
The demonstration of topological protection for squeezed light on a chip brings new opportunities for quantum integrated photonics, opening novel approaches for the design of advanced multi-photon circuits ...
The authors thank Jian-Wei Pan for helpful discussions. ...
arXiv:2106.07425v1
fatcat:nnwwekr3wjbc5iu7xi5yhi7k6a
Control Design, Analysis and Testing of a Three-phase VSI using IDA-PBC Approach
2019
IET Power Electronics
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It is shown that in the case of accurately known filter parameters and perfectly zero initial conditions, theoretically, the voltage controller would exhibit unity voltage gain and zero output impedance ...
The presented analysis and the proposed tuning method for controller gain have been tested through simulation studies. ...
A physics-based non-linear modelling approach known as port-Hamiltonian (pH) modelling is the base of the IDA-PBC method. ...
doi:10.1049/iet-pel.2019.0553
fatcat:3t3zzcsvxzchzhongl32b76lry
Robust strong coupling architecture in circuit quantum electrodynamics
[article]
2021
arXiv
pre-print
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We derive an analytical expression for the coupling strength in terms of circuit parameters and also discuss the maximum achievable coupling within this framework. ...
Our framework is useful for quantum thermodynamic experiments since the heat current is proportional to the square of the coupling between a qubit and the resonator employed for spectral filtering 28, ...
The total Hamiltonian of the system is given as H = H res + H loop + H int , where that of the resonator in terms of the ladder operators (a n , a † n ) and frequency of the nth mode ω n is H res = ∞ n ...
arXiv:2107.11135v1
fatcat:2aeoee7msjd7jp6vpeu4xqtari
Quantum dynamics of simultaneously measured non-commuting observables
2016
Nature
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2016 pre-print arXiv:1608.06652v2 fatcat:do4wsdzmqbeqtgmwbg4ndvs2niOther Versions
As physical systems often interact continuously with their environment via non-commuting degrees of freedom, our work offers a way to study how notions of contemporary quantum foundations arise in such ...
In quantum mechanics, measurements cause wavefunction collapse that yields precise outcomes, for non-commuting observables such as position and momentum Heisenberg's uncertainty principle limits the intrinsic ...
The output is followed by an amplifier model ZRON8G+ and then passed through a home built notch filter which attenuates the carrier by ∼ 25 dB relative to the sideband tones. ...
doi:10.1038/nature19762
pmid:27706145
fatcat:zxzz35ytenefdb5pzonmnqwbya
Quantum Nondemolition Measurement of a Quantum Squeezed State Beyond the 3 dB Limit
2016
Physical Review Letters
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Our measurements also reveal evidence for an additional mechanical parametric effect. ...
We use a reservoir engineering technique based on two-tone driving to generate and stabilize a quantum squeezed state of a micron-scale mechanical oscillator in a microwave optomechanical system. ...
The device studied in this work is a two ports optomechanical system. Microwave tones are applied from the left port, which we designate (L). ...
doi:10.1103/physrevlett.117.100801
pmid:27636463
fatcat:ql2aocsly5fghbz6fixib4rdge
Fast readout and reset of a superconducting qubit coupled to a resonator with an intrinsic Purcell filter
[article]
2022
arXiv
pre-print
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We use this "intrinsic Purcell filter" to demonstrate a 40-ns readout with 99.1% fidelity and a 100-ns reset with residual excitation of less than 1.7%. ...
Further investigation is needed on the effect of the notch-like filtering on π pulses applied through the filter. ...
This is especially problematic around the notch of our filter, where the real part approaches zero. ...
arXiv:2202.06202v1
fatcat:ojx5cyjnjzhy3kf2qjp6l4ovb4
Quantum squeezing of motion in a mechanical resonator
2015
Science
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This work is relevant to the quantum engineering of states of matter at large length scales, the study of decoherence of large quantum systems, and for the realization of ultra-sensitive sensing of force ...
In this work, using microwave frequency radiation pressure, we both prepare a micron-scale mechanical system in a state near the quantum ground state and then manipulate its thermal fluctuations to produce ...
The filter cavities have two ports, and thus can either be used as transmission, band-pass filters or the second port can be shorted, and the reflected signal can be picked off with a circulator for a ...
doi:10.1126/science.aac5138
pmid:26315431
fatcat:w4xzpdbfgjho3ai7onhb6222s4
Direct generation of tunable orbital angular momentum beams in microring lasers with broadband exceptional points
[article]
2019
arXiv
pre-print
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As of now, however, in order to stabilize a system at the vicinity of an exceptional point, its related parameters must be carefully tuned and/or continuously controlled. ...
In active settings, the resulting unidirectionality exhibits unprecedented resilience to perturbations, thus providing a robust and tunable approach for directly generating beams with distinct orbital ...
port. ...
arXiv:1903.10108v1
fatcat:zb7oeyyqabfnpaux5blfx4w7fm
Topological photonic crystals: physics, designs and applications
[article]
2022
arXiv
pre-print
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For example, a narrowband flattop reflection filter is in need for achieving the wavelength sensitivity in wavelength-division multiplexing systems [311] . ...
Optical filters play an important role in communication systems. ...
arXiv:2201.06294v1
fatcat:vvzzbtjvkvatdnjgwgovkncoaa
Dual-Resonator Kinetic-Inductance Detector for Distinction between Signal and 1/f Frequency Noise
[article]
2022
arXiv
pre-print
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In the theory, based on a quantum-information-science modes, we calculate the 4-port S parameters and simulate the 1/f frequency noise of the device. ...
Here we present a Dual-Resonator KID (DuRKID), which is designed for improved signal to noise (or noise equivalent power) relative to 1/f-noise limited KIDs. ...
Wustmann for scientific discussions. This work was funded through a NASA Science Innovation Fund (SIF) award and the Intelligence Community Postdoctoral Fellowship Award. ...
arXiv:2202.11310v2
fatcat:tasggm4tjrahfb47ehd53ueq4m
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