2,709 research outputs found
Markus Aspelmeyer: Quanten-Optomechanik - Was man von Sprungbrettern über Quantenphysik lernen kann. Antrittsvorlesung
No full textMitschnitt einer Veranstaltung am Mittwoch, dem 2. März 2011 im Christian-Doppler-Hörsaal der Fakultät für Physik der Universität Wien
Moderation: Christoph Dellago
Markus Aspelmeyer ist Professor für Quantum Information on the Nanoscale an der Fakultät für Physik der Universität Wien.
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1. Vorspann 00:00:00
2. Heinz W. Engl: Begrüßung 00:00:18
3. Christoph Dellago: Einleitende Worte 00:04:58
4. Warum funktioniert Physik? 00:17:15
5. Quantensuperposition 00:26:39
6. Lichtdruck im Experiment 00:34:39
7. Strahlungsdruck und Quantenphysik 00:46:39
8. Cavity-Opto-Mechanik 00:54:40
9. Wie lange schwingt ein Sprungbrett? 01:07:41
10. Mechanik für Quanteninformation 01:19:22
11. Quanten-Optomechanik weltweit 01:27:53
12. Publikumsfragen 01:39:0
AshleySetter/optoanalysis: Zenodo release
No full text<p>Matterwave group data analysis library.</p>
<p>This is the optoanalysis package developed primarily by Ashley Setter of the Quantum Nanophysics and Matter Wave Interferometry group headed up by Prof. Hendrik Ulbricht at Southampton University in the UK.</p>
<p>The thermo module of this package was developed mainly by Markus Rademacher of the University of Vienna in Austria, who works in the group of Markus Aspelmeyer and Nikolai Kiesel.</p>
<p>This library contains numerous functions for loading, analysing and plotting data produced from our optically levitated nanoparticle experiment. We use an optical tweezer setup to optically trap and levitate nanoparticles in intense laser light and measure the motion of these particles interferometrically from the light they scatter. This library provides all the tools to load up examples of this kind of data and analyse it. Currently data can be loaded from .trc or .raw binary files produced by Teledyne LeCroy oscilloscopes and .bin files produced from by Saleae data loggers.</p>
<p>Some example usage of this library is shown in this Jupyter notebook.</p>
<p>If you use this package in any academic work it would be very appretiated if you could cite it</p>Supported by EPSRC under Centre for Doctoral Training grant EP/L015382/1
Influence of satellite motion on polarization qubits in a Space-Earth quantum communication link
No full textIn a Space quantum-cryptography experiment a satellite pointing system is needed to send single photons emitted by the source on the satellite to the polarization analysis apparatus on Earth. In this paper a simulation is presented regarding how the satellite pointing systems affect the polarization state of the single photons, to help designing a proper compensation system.</p
Remote quantum entanglement between two micromechanical oscillators
No full textEntanglement, an essential feature of quantum theory that allows for inseparable quantum correlations to be shared between distant parties, is a crucial resource for quantum networks(1). Of particular importance is the ability to distribute entanglement between remote objects that can also serve as quantum memories. This has been previously realized using systems such as warm(2,3) and cold atomic vapours(4,5), individual atoms(6) and ions(7,8), and defects in solid-state systems(9-11). Practical communication applications require a combination of several advantageous features, such as a particular operating wavelength, high bandwidth and long memory lifetimes. Here we introduce a purely micromachined solid-state platform in the form of chip-based optomechanical resonators made of nanostructured silicon beams. We create and demonstrate entanglement between two micromechanical oscillators across two chips that are separated by 20 centimetres. The entangled quantum state is distributed by an optical field at a designed wavelength near 1,550 nanometres. Therefore, our system can be directly incorporated in a realistic fibre-optic quantum network operating in the conventional optical telecommunication band. Our results are an important step towards the development of large-area quantum networks based on silicon photonics.
Anthony Leggett: Schroedinger's Cat and her laboratory cousins. Teil 1: Begrüßung und Einführung
No full text1. Vortrag im Rahmen der "Erwin Schrödinger Distinguished Lecture Series"
Mitschnitt einer Veranstaltung des Vienna Center for Quantum Science and Technology (VCQ) am Freitag, dem 18. März 2011 im Großen Festsaal der Universität Wien
Teil 1: Begrüßung und Einführung
Es sprechen Georg Winckler (Rektor der Universität Wien) und Markus Aspelmeyer (VCQ)
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1. Vorspann 00:00:00
2. Georg Winckler: Welcoming address 00:00:17
3. Markus Aspelmeyer: Introductory remarks 00:07:2
Hanbury Brown and Twiss interferometry of single phonons from an optomechanical resonator
No full textMechanical systems at the quantum level
A number of platforms are being pursued for developing technologies that exploit the enhanced sensing and measurement capabilities of quantum mechanics. Hybrid systems offer the flexibility of combining and optimizing different platforms. Hong
et al.
combined optomechanical control of motion and single-phonon counting techniques to probabilistically generate a single-phonon Fock state within a nanomechanical resonator. Chu
et al.
used electromechanical coupling to address a bulk piezoelectric resonator with a superconducting quantum circuit. Both approaches hold promise for developing hybrid quantum technologies.
Science
, this issue p.
203
, p.
199
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Anthony Leggett: Schroedinger's Cat and her laboratory cousins. Teil 3: Publikumsfragen
No full text1. Vortrag im Rahmen der "Erwin Schrödinger Distinguished Lecture Series"
Mitschnitt einer Veranstaltung des Vienna Center for Quantum Science and Technology (VCQ) am Freitag, dem 18. März 2011 im Großen Festsaal der Universität Wien
Teil 3: Publikumsfragen
Moderation: Markus Aspelmeyer
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1. Vorspann 00:00:00
2. Questions from the audience 00:00:1
Evidence based leadership
No full textAuthor Markus PodduikinMasterarbeit Johannes Kepler Universität Linz 2024Arbeit gesperr
Improving the search for monitoring tools using recommender technology
No full textAuthor Markus Eisl BSc.Masterarbeit Universität Linz 2023Arbeit gesperr
Improving the search for monitoring tools using recommender technology
No full textAuthor Markus Eisl BSc.Masterarbeit Universität Linz 2023Arbeit gesperr
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