September 18, 2024
How to Annoy an Electron? Kick It with a Single Photon!
Check out our preprint
“Exploring single-photon recoil on free electrons”
Alexander Preimesberger, Dominik Hornof, Theo Dorfner, Thomas Schachinger, Martin Hrtoň, Andrea Konečná, Philipp Haslinger
arXiv:2409.12216
Recent advancements in time-resolved electron and photon detection enable novel correlative measurements of electrons and their associated cathodoluminescence (CL) photons within a transmission electron microscope. These studies are pivotal for understanding the underlying physics in coherent CL processes. We present experimental investigations of energy-momentum conservation and the corresponding dispersion relation on the single particle level, achieved through coincidence detection of electron-photon pairs. This not only enables unprecedented clarity in detecting weak signals otherwise obscured by non-radiative processes but also provides a new experimental pathway to investigate momentum-position correlations to explore entanglement within electron-photon pairs.
September 9, 2024
Have you ever seen a
Snapshot of Relativistic Motion?
Check out our preprint
“A Snapshot of Relativistic Motion: Visualizing the Terrell Effect”
Dominik Hornof, Victoria Helm, Enar de Dios Rodriguez, Thomas Juffmann, Philipp Haslinger, Peter Schattschneider
arXiv:2409.04296
We present an experimental visualization of the Terrell effect, an optical phenomenon predicted in 1959 by Roger Penrose and James Terrell, which reveals that the Lorentz contraction of a moving object is not visible in a snapshot photograph. Using fs-laser pulses and a gated intensified camera that allows gating times as short as 300 ps, we achieve a virtual reduction of the speed of light to less than 2 m/s, enabling the visualisation of relativistically moving objects in real time. By capturing light reflected from deliberately Lorentz-contracted objects, our setup effectively reconstructs their visual appearance. This didactic visualization not only commemorates the centennial of Anton Lampa’s seminal 1924 paper on relativistic length contraction but also provides the first experimental evidence of the Terrell effect in a laboratory setup. Our results comprise detailed relativistic illustrations, simulations and photographic snapshots of a sphere and a cube, which are animated to velocities close to the speed of light, revealing the apparent rotation effect and the distortion predicted by relativistic theory.
September 4, 2024
BruQner – The Sound of Entanglement
BruQner is one of the first attempts in the world to work musically with genuine quantum mechanics. Entangled photon pairs from lasers will take on the role of a conductor and show the disruptive findings of the second quantum revolution in a performance for the first time. BruQner is completely committed to the festival motto “Tradition, Innovation and Avant-Garde” – marvel with us and hear the future potential in Bruckner‘s music!
The second quantum revolution as a musical spectacle: Lasers, mirrors, non-linear crystals – an experimental setup from the hightech laboratory in the middle of Linz’s new Cathedral. Entangled photons – the quanta of light – become conductors and direct Bruckner‘s Perger Präludium in a way that no human could in the here and now. The Cathedral organists play live on the two resounding church organs and fill the Mariendom‘s spectacular acoustic space.
BruQner shows us a new view of our reality – a world premiere!
August 30, 2024
Our new preprint on Electron Spectroscopy in a Transmission Electron Microscopy is online!
Antonín Jaroš, Johann Toyfl, Andrea Pupić, Benjamin Czasch, Giovanni Boero, Isobel C. Bicket, Philipp Haslinger
arXiv:2408.16492
Coherent spin resonance methods such as nuclear magnetic resonance (NMR) and electron spin resonance (ESR) spectroscopy have led to spectrally highly sensitive, non-invasive quantum imaging techniques with groundbreaking applications in fields such as medicine, biology, and physics. Meanwhile, transmission electron microscopy (TEM) offers detailed investigations with sub-atomic resolution, but often inflicts significant radiation damage. Here we exploit synergies and report on an integration of ESR spectroscopy in a TEM. Our miniaturized ESR setup on a standard TEM sample holder leverages the strong magnetic field of the TEM polepiece to align and energetically separate spin states. This integration will facilitate in-situ studies of spin systems and their dynamics, quantum materials, radicals, electrochemical reactions, and radiation damage – properties previously mainly invisible to electron microscopic tools. Moreover, this development marks a significant technological advancement toward microwave-controlled quantum spin studies with a highly controlled electron probe at the nanoscale.
August 21, 2024
DerStandard features our Art & Science project
“The Temporal Forest”
within European Capital of Culture Bad Ischl Salzkammergut 2024
June 19, 2024
Our Article on Introducing Spin Resonance Spectroscopy to Transmission Electron Microscopy is Accepted!
“Spin Resonance Spectroscopy with an Electron Microscope”
Philipp Haslinger, Stefan Nimmrichter, Dennis Rätzel
Quantum Science and Technology, DOI 10.1088/2058-9565/ad52bc
Coherent spin resonance methods, such as nuclear magnetic resonance and electron spin resonance spectroscopy, have led to spectrally highly sensitive, non-invasive quantum imaging techniques. Here, we propose a pump-probe spin resonance spectroscopy approach, designed for electron microscopy, based on microwave pump fields and electron probes. We investigate how quantum spin systems couple to electron matter waves through their magnetic moments and how the resulting phase shifts can be utilized to gain information about the states and dynamics of these systems. Notably, state-of-the-art transmission electron microscopy provides the means to detect phase shifts almost as small as that due to a single electron spin. This could enable state-selective observation of spin dynamics on the nanoscale and indirect measurement of the environment of the examined spin systems, providing information, for example, on the atomic structure, local chemical composition and neighboring spins
June 12, 2024
Bringing Quantum Physics to Schools
Andrea Pupic talked to the pupils of Volksschule De La Salle Fünfhaus and Bundesrealgymnasium Wien19 about her exciting research work on quantum electron optics. She made complicated ideas easy to understand and shared her enthusiasm for exploring the “tiny world” of quantum physics. Her talks inspired the pupils and showed how important it is to make science accessible to everyone and to make it interesting and entertaining.
May 24, 2024
Lange Nacht der Forschung @ USTEM
Atoms – The Pixels of Our Reality
A big thank you to the over 100 visitors who joined us at USTEM for Lange Nacht der Forschung! Our aim is to spark your curiosity by unravelling the mysteries of the nanoscopic world. We explored our reality on the atomic level with the help of electron microscopes and investigated the remarkable wave-particle duality of electrons live.
May 3, 2024
The Temporal Forest
„The Temporal Forest“, ein Projekt der Europäischen Kulturhauptstadt Bad Ischl Salzkammergut 2024 von SEEC Photography (Enar de Dios Rodríguez, Philipp Haslinger (TU Wien), Thomas Juffmann (Uni Wien)) und Jonathon Keats mit der Unterstützung von Victoria Helm (Uni Wien) und Dominik Hornof (TU Wien).
The Temporal Forest ist ein künstlerisch-wissenschaftliches Projekt, das die schnellsten und langsamsten fotografischen Techniken kombiniert, um neue Perspektiven auf die Umwelt zu ermöglichen. Dadurch entsteht ein Eindruck, der über den alltäglichen menschlichen Zeithorizont hinausgeht.
Die Bewegung des Lichts, das eine Geschwindigkeit von 299 792 458 Metern pro Sekunde hat, wird in einer Videoinstallation in der Galerie gezeigt. Mit Hilfe eines gepulsten Lasers und einer Zeitraffer-Kamera mit ultrakurzen Belichtungszeiten zeigt diese Installation, wie sich das Licht durch eine Reihe von heimischen Baumarten bewegt. Die Videos zeigen also im wahrsten Sinne des Wortes, wie das Licht (Foto-) ein Bild der Wälder des Salzkammergutes schreibt (-graphie).
Mitten in den Alpen, auf der Spitze des Zwölferkogels, dokumentiert eine Milleniumkamera fotografisch die nächsten tausend Jahre Veränderungen der Kultur- und Naturlandschaft in der Region. Diese handgefertigte Kamera hat eine winzige Lochblende, die das Licht auf Farbpigmente bündelt und so ganz langsam ein einzigartiges Bild erzeugt. Das so entstandene Foto wird ein Zeugnis der Zeit sein, aufgenommen mit einer Belichtungszeit von tausend Jahren.
April 15, 2024
Das Doppelspalt-Experiment mit Elektronen:
The Double Slit Experiment
Ein hoch präziser Einblick in die Quantenwelt am Elektronenmikroskop
April 15th 2024 – 16:00 Live Stream
Das Doppelspalt-Experiment gehört zu den faszinierendsten Demonstrationen in der Physik und liefert einen eindrucksvollen Beweis für die Quantennatur der Materie. Ursprünglich mit Licht durchgeführt, zeigt es für Elektronen, dass auch Teilchen Welleneigenschaften aufweisen können. Aber wie kann man einzelne Elektronen gleichzeitig durch zwei Spalte schießen und dabei beobachten, wie sie ein Interferenzmuster erzeugen, ähnlich den Wellen auf einer Wasseroberfläche? Und noch erstaunlicher, wie kann man live beobachten, dass sich Elektronen plötzlich wieder wie Teilchen und nicht wie Wellen verhalten! Genau das ergründen wir, indem wir mit euch experimentell die Grundprinzipien der Quantenmechanik zu entschlüsseln und verstehen versuchen. Tauchen Sie mit uns ein, in eine Stunde voller Entdeckungen, die die Grenzen unseres klassischen Weltbildes herausfordern an der Universitären Service-Einrichtung für Transmissionselektronenmikroskopie (USTEM) der TU Wien.
Alexander Preimesberger, Isobel Bicket & Philipp Haslinger + Team
January 17, 2024
Isobel Bicket from McMaster University (Canada) joins our team as a PostDoc!
Welcome 🙂
January 15, 2024
Our new preprint on Electron Spectroscopy and Transmission Electron Microscopy is online!
Spin Resonance Spectroscopy with an Electron Microscope
Philipp Haslinger, Stefan Nimmrichter, Dennis Rätzel
arXiv:2401.06496
Coherent spin resonance methods, such as nuclear magnetic resonance and electron spin resonance spectroscopy, have led to spectrally highly sensitive, non-invasive quantum imaging techniques. Here, we propose a pump-probe spin resonance spectroscopy approach, designed for electron microscopy, based on microwave pump fields and electron probes. We investigate how quantum spin systems couple to electron matter waves through their magnetic moments and how the resulting phase shifts can be utilized to gain information about the states and dynamics of these systems. Notably, state-of-the-art transmission electron microscopy provides the means to detect phase shifts almost as small as that due to a single electron spin. This could enable state-selective observation of spin dynamics on the nanoscale and indirect measurement of the environment of the examined spin systems, providing information, for example, on the atomic structure, local chemical composition and neighboring spins.
January 14, 2023
Join us at radical⇌matter Symposium
Friday 26 and Saturday 27 January, 2024
FJK3 – Contemporary Art Space
Franz-Josefs-Kai 3
1010 Vienna
November 11, 2023
Philipp Haslinger receives the Kardinal-Innitzer-Förderungspreis
November 6, 2023
Johann Toyfl joined our group as a Master student and will develop novel quantum tools for transmission electron microscopy.
Welcome!!!
October 24, 2023
Congratulation!
There is a new Dipl. Ing. in town.
Dipl. Ing. Alexander Preimesberger
Who joins as a PhD student our quantum electron optics projects.
October 1, 2023
Santiago Steven Beltran Romero joined our group as a PhD student and will work on quantum electron optics.
Welcome!!!
October 1, 2023
Quantum Electron Optics @ USTEM is featured at TU-Alumni Bulletin – Elektronenmikroskopie in der zweiten Quantenrevolution
September 26, 2023
What a wonderful workshop at the Erwin Schrödinger Institut on
“Blackbody Radiation Induced Effects and Phenomena“.
September 20, 2023
Group retreat –> Bike tour to Vienna – Bratislava
September 10, 2023
Andrea Pupic joined our group as a master student and will work on novel quantum probes for transmission electron microscopy. Welcome!!!
August 28, 2023
Antonín Jaros joined our group as a PhD student and will develop novel quantum tools for transmission electron microscopy.
Welcome!!!
July 10, 2023
Sergey Bogdanov joined our group as a PhD student and will work on quantum electron optics.
Welcome!!!
June 17, 2023
This workshop might have been the start of something very special!
May 10, 2023
Harsh Mishra joined our group as a master student and will work on quantum electron optics. Welcome!!!
April 5, 2023
Master/PhD/PostDoc Positions
We are looking for you to participate in our research on
Atom Interferometry and Electron Microscopy!
March 25, 2023
Generation |Y> Workshop @ Evo
Together with Robert Fickler, we organised the Generation |Y> workshop in Evo, Finland. This was a meeting of physicists and artists of the so-called Generation Y, who were spatially projected in Austria at a certain point in their careers. The meeting provided a perfect environment to exchange ideas for research and teaching, but also to discuss important topics such as equality, diversity, AI and a rethink of science. Many thanks to all participants for a great meeting with many interesting conversations in and around the Mökki, the hot tubs, the sauna and the ice hole :). … and a huge THANK YOU to our student helpers for the great food they prepared, you were fantastic !!!
February 16, 2023
What a wonderful team of scientists at the Erwin Schrödinger Institut workshop on
“Blackbody Radiation Induced Effects and Phenomena“.
December 1, 2022
The USTEM at the recently build Atominstitut ZE will receive an ultra-fast Transmission Electron Microscope (AQUTEM) dedicated to fundamental quantum science.
We are looking for you to participate in this exciting endeavor!
November 18, 2022
September 12, 2022
That was fun!
Speed of light @
Wiener Forschungsfest 2022
in collaboration with
SEEC Photography
and the group of
Prof. Juffmann.
August 31, 2022
Speed of light @
Wiener Forschungsfest 2022
in collaboration with
SEEC Photography
and the group of
Prof. Juffmann.
August 28, 2022
We are looking for Master and PhD students to join our team to work on “Quantum Optics with Electron-Photon Pairs”!
August 25, 2022
July 27, 2022
Light induced dipole-dipole interactions are pretty cool 🙂
Observation of Light-Induced Dipole-Dipole Forces in Ultracold Atomic Gases
M. Maiwöger, M. Sonnleitner, T. Zhang, I. Mazets, M. Mallweger, D. Rätzel, F. Borselli, S. Erne, J. Schmiedmayer, P. Haslinger
Phys. Rev. X 12, 031018 (2022)
Light-matter interaction is well understood on the single-atom level and routinely used to manipulate atomic gases. However, in denser ensembles, collective effects emerge that are caused by light-induced dipole-dipole interactions and multiple photon scattering. Here, we report on the observation of a mechanical deformation of a cloud of ultracold 87Rb atoms due to the collective interplay of the atoms and a homogenous light field. This collective light scattering results in a self-confining potential with interesting features: It exhibits nonlocal properties, is attractive for both red- and blue-detuned light fields, and induces a remarkably strong force that depends on the gradient of the atomic density. Our experimental observations are discussed in the framework of a theoretical model based on a local-field approach for the light scattered by the atomic cloud. Our study provides a new angle on light propagation in high-density ensembles and expands the range of tools available for tailoring interactions in ultracold atomic gases.
June 15, 2022
Poster Prize at the “Quantum Electron Optics” 770. WE-Heraeus-Seminar goes to Matthias Kolb. Congratulations!
June 15, 2022
Yeahhh!!! The COST proposal “COSMIC WISPers in the Dark Universe: Theory, astrophysics and experiments” got approved.
April 20, 2022
Groupretreat (with Leonard group) @ Heizhaus: from Quantum to Steam Mechanics
February 2, 2022
Observation of Light-Induced Dipole-Dipole Forces in Ultracold Atomic Gases
M. Maiwöger, M. Sonnleitner, T. Zhang, I. Mazets, M. Mallweger, D. Rätzel, F. Borselli, S. Erne, J. Schmiedmayer, P. Haslinger
Now available on arXiv:2202.00562
We investigate an attractive force caused by light induced dipole-dipole interactions in freely expanding ultracold 87Rb atoms. This collective, light-triggered effect results in a self-confining potential with interesting features: it exhibits nonlocal properties, is attractive for both red and blue-detuned light fields and induces a remarkably strong force that depends on the gradient of the atomic density. The experimental data are discussed in the framework of a theoretical model based on a local-field approach for the light scattered by the atomic cloud.
October 18, 2021
Philipp Haslinger receives the “Anerkennungspreis Wissenschaft” (recognition award) of Lower Austria.
October 11, 2021
Discrimination of coherent and incoherent cathodoluminescence using temporal photon correlations
M. Scheucher, T. Schachinger, T. Spielauer, M. Stöger-Pollach, P. Haslinger
Now available on arXiv:2110.05126
We present a method to separate coherent and incoherent contributions of cathodoluminescence (CL) by using a time-resolved coincidence detection scheme. For a proof-of-concept experiment, we generate CL by irradiating an optical multimode fiber with relativistic electrons in a transmission electron microscope. A temporal analysis of the CL reveals a large peak in coincidence counts for small time delays, also known as photon bunching. Additional measurements allow us to attribute the bunching peak to the temporal correlations of coherent CL (Cherenkov radiation) created by individual electrons. Thereby, we show that coincidence measurements can be employed to discriminate coherent from incoherent CL and to quantify their contribution to the detected CL signal. This method provides additional information for the correct interpretation of CL, which is essential for material characterization. Furthermore, it might facilitate the study of coherent electron-matter interaction.
September 20, 2021
Alexander Preimesberger has started as a master student in our group to investigate electron-photon pairs. Very exciting project!!!
July 28, 2021
Controlling quantum systems with modulated electron beams
D Rätzel, D Hartley, O Schwartz, P Haslinger
Phys. Rev. Res. 3 (2), 023247; arXiv:2004.10168
February 25, 2021
Two-particle Interference in Double Twin-atom-beams
F. Borselli, M. Maiwöger, T. Zhang, P. Haslinger, V. Mukherjee, A.Negretti, S. Montangero, T. Calarco, M. Bonneau, J. Schmiedmayer
Phys. Rev. Lett. 126, 083603; arXiv:2009.13438
December 22, 2020
SEEC: Photography at the speed of light
Check out the new article on our science-art outreach project SEEC-Photography.
December 10, 2020
Music video at the speed of light
Watch the “slowest” music video!
The video was produced in collaboration with the Austrian soul band 5/8erl in Ehr’n and our arts and science collaboration SEEC photography.
Clemens Wenger (5/8erl in Ehr’n) and Philipp Haslinger will discuss it on the Austrian radio station Ö1 today: https://oe1.orf.at/programm/20201210/621108/Vom-Lied-zur-Lichtgeschwindigkeit-und-zurueck
September 28, 2020
Congratulation to the new Dipl. Ing.!
Dipl. Ing. Matthias Kolb
July 29, 2020
Get involved !!!
We are looking not only for real “hands-on” experimentalists with a solid background in theory but also for theorists who like to see their formulas get turned to phenomena!
Contact us if you are curiosity driven and you want to work on quantum optics with atoms, electrons and photons:
-) On the Master level if you have excellent study grades.
-) On the PostDoc level if you have experience either in
- Quantum Optics Theory
- Experimental Quantum Optics with Photons
- Experimental Quantum Optics with Electron
- Cold Atoms
- Electron Microscopy
- Matterwave Interferometry
July 27, 2020
Good news! Our new ESQ Discovery project on electron-photon pairs got approved!
July 23, 2020
Congratulation!
There is a new Dipl. Ing. in town.
Dipl. Ing. Marion Mallweger
April 22, 2020
A Quantum Klystron —
Controlling Quantum Systems with Modulated Electron Beams
Dennis Rätzel, Daniel Hartley, Osip Schwartz, Philipp Haslinger
Now available on arXiv:2004.10168
Coherent control of quantum transitions generally relies on interactions of the quantum system with electromagnetic waves. We show that the electromagnetic near-field of a current-modulated free-space electron beam can be employed for coherent manipulation of quantum systems. Using Rabi oscillations between hyperfine levels of potassium atoms and magnetic sublevels in nitrogen vacancy centers as examples, we demonstrate that such manipulation can be performed with only classical control over the electron beam itself, and is readily realizable with current technology. Potential challenges like shot noise and decoherence through back action on the electrons are found to be insignificant for our implementation. These results provide a pathway towards electron-mediated delivery of spatially and spectrally tailored electromagnetic fields for quantum control on the nano-scale.
April 22, 2020
Congratulation to the new doctor! Dr. Daniel Hartley
September 24, 2019
1st Generation |Y> Meeting in Austria
Together with Robert Fickler, we organised the first Generation |Y> meeting in Ramsau, Austria. This was a gathering of around 30 quantum physicists from the so-called generation Y, who have been spatially projected at some point of their career in Austria. The meeting offered a perfect environment to exchange research and teaching ideas but also to discuss important topics such as equality, diversity, and rethinking academia. It was a great success and follow-up workshops are already planned.
More information in this link.
September 1 – 3, 2019
We spent a wonderful group retreat at the National Park Thayatal with a lot of physics and biking. 🙂
June 6, 2019
Good news. Our ESQ Discovery project got approved!
May 14, 2019
Thomas Weigner joined our group and will work on cold atoms and electrons. Welcome!!!
April 10, 2019
Philipp Haslinger receives the Young Scientist Prize 2019 of the Atomic, Molecular and Optical Physics Division of the European Physical Society (ESP).
February 26, 2019
Kick-off-meeting (26.-28.2.2019) of our ESI-Research in Teams Project on Black body Radiation Induced Inertial Effects and Collective Phenomena.
February 18, 2019
Matthias Kolb has started as a master student in our group on cold atoms and electrons. Very exciting project!!!
January 28, 2019
Felix Feichtinger and Felix Korbelius are joining us for their bachelor projects.
Welcome!!!
Dezember 1, 2018
Marion Mallweger has started as a master student in our group on black body radiation induced forces.
Welcome!!!
November 23, 2018
Erwin Schrödinger International Institute for Mathematics and Physics
Research in Teams Project:
Black body Radiation Induced Inertial Effects and Collective Phenomena
Today we got our ESI Research in Teams project on inertial effects of black body radiation approved!
Over the next two years we will work in close collaboration with Dr. Dennis Rätzel (Humboldt University Berlin), Dr. Francesco Intravaia (Humboldt University Berlin) and Dr. Matthias Sonnleitner (University Innsbruck). The aim of this project is to establish a theoretical description for non-equilibrium thermal radiation forces on particles and to investigate the feasibility of new exciting experiments to measure such effects with cold atoms, in particular, by using matter wave interferometric techniques.
September 29, 2018
PhD/Master positions available!
We are looking for motivated students to work on the project
“Lattice Atom Interferometry (LATIN) – new frontiers in quantum sensing with ultra-long interaction times “
Atom interferometers have enabled us to measure forces with exceptionally high precision. Inevitably, these forces are averaged over the free-fall trajectory of the atoms (up to 10 m), since sensitivity scales with the free-fall time. This precludes measurements of localized forces. To shrink these distances we will use the optical lattice of a high finesse cavity to hold the atoms against gravity in order to perform lattice atom interferometry with ultra long interaction times.
Please send relevant documents, (CV, study records, list of talks and publications), as one single PDF file to philipp.haslinger(at)tuwien.ac.at
September 2, 2018
“Bis an die Grenzen des Messbaren”
Our popular science publication on recent atom interferometry research has been published by Physik in unserer Zeit.
Holger Müller, Philipp Haslinger. Physik in Unserer Zeit, 228-235 (2018).
“Atominterferometer zählen derzeit zu den genauesten Instrumenten zur Messung von Naturkonstanten und anderen Größen. So lässt die jüngste Messung der Feinstrukturkonstante interessante Rückschlüsse auf das Standardmodell zu. Auch Vorhersagen für exotische Phänomene wie Dunkle Photonen, Chamäleon‐Felder oder eine Fünfte Kraft sind damit überprüfbar. Zudem wurde mit einem Atominterferometer erstmals eine anziehende Kraft der Schwarzkörperstrahlung auf Atome gemessen.”
