IMDEA NanocienciaNew computational method captures molecular dynamics after ultrafast excitation.
Researchers capture how electrons and nuclei interact after #attosecond light excitation in a numerically inexpensive way.
#IMDEAnanoPublications @tomATTOsecond
Anthony DavidOur postdoc has spent his time, while the lab building has been closed, exploring some ideas around strong field physics. It is generally discussed in semi-classical terms, however he is considering a model using quantum "squeezed" light. Contributions also from a couple of my supervisors. It has been submitted for publication, with a link to the preprint below.
"...
Crucially, we show that the collapse of holographic contrast is not a loss of information but
a metrological gain.
...
This fundamental trade-off between structural imaging fidelity and
statistical sensitivity establishes the framework for Attosecond Quantum Tomography: an in-situ,
reference-free protocol
...
Our results
identify strong-field ionization as a nonlinear quantum transducer, bridging attosecond electron
dynamics with quantum information science"
https://arxiv.org/abs/2602.13667v1
#physics #strong-field #attosecond #quantum
Strong-Field Quantum Metrology Beyond the Standard Quantum Limit
Bridging quantum optics and strong-field physics provides a pathway to explore how quantum light shapes extreme nonlinear light-matter interactions. However, direct characterization of non-classical light at damage-threshold intensities remains an open question. Here, we theoretically investigate the impact of photon-number fluctuations of squeezed light on strong-field photoelectron holography using a quantum-optical strong-field approximation. We identify a mechanism, ponderomotive dephasing, whereby the inherent quantum fluctuations of the driving field dictate the stability of the electron's semiclassical action. While amplitude-squeezed light stabilizes the action to enhance holographic contrast, phase-squeezed light amplifies photon-number noise, causing a rapid collapse of fringe visibility. This quantum-optical sensitivity follows a steep quartic wavelength scaling, rendering mid-infrared drivers uniquely sensitive to the field's underlying quantum nature. Crucially, we show that the collapse of holographic contrast is not a loss of information but a metrological gain. By evaluating the Classical Fisher Information, we identify a "dark-port" mechanism in the tunneling tail that enables the estimation of field quadrature noise beyond the Standard Quantum Limit. This fundamental trade-off between structural imaging fidelity and statistical sensitivity establishes the framework for Attosecond Quantum Tomography: an in-situ, reference-free protocol to reconstruct the Wigner distribution of intense quantum light. Our results identify strong-field ionization as a nonlinear quantum transducer, bridging attosecond electron dynamics with quantum information science.
IL PhotonicsAn #XUV #CCD camera played a crucial role in a study pushing the boundaries of #attosecond, core-level #spectroscopy. This research unveiled new insights into the dynamics of quantum materials, particularly in identifying long-range, charge-density-wave formation in a quasi-2D excitonic insulator candidate. Learn more: https://ilphotonics.com/identifying-long-range-charge-density-wave-formation/
Science NewsResearchers at @EuropeanXFEL have created a state of #matter as it occurs in the interior of #planets or during #inertial confinement #fusion. They also open up a way to measure extremely short phenomena #attosecond #physics
https://www.xfel.eu/news_and_events/news/index_eng.html?openDirectAnchor=2426&two_columns=0
idw_onlineResearchers at @EuropeanXFEL have created a state of #matter as it occurs in the interior of #planets or during #inertial confinement #fusion. They also open up a way to measure extremely short phenomena #attosecond #physics
https://www.xfel.eu/news_and_events/news/index_eng.html?openDirectAnchor=2426&two_columns=0
Peter RileyTiny, tinier & tiniest ?
(Something in the water)
https://www.anl.gov/article/firstever-atomic-freezeframe-of-liquid-water
Alan BoyleTalk about geeky! A new technique that blasts atoms with X-ray pulses can track how atoms respond to radiation on a scale of attoseconds - where one #attosecond is a millionth of a trillionth of a second. https://www.geekwire.com/2024/freeze-frame-electrons-water/ #Science #Tech
Markus Osterhoff
Knowledge ZoneHow #ChatGPT and other #AI tools could disrupt #Scientific #Publishing : Nature
#Attosecond #Spectroscopy wins 2023’s #Nobel Prize in #Physics : Medium
#LargeHadronCollider turned into world's biggest #Quantum #Experiment : New Scientist
Check our latest #KnowledgeLinks
ScienceActuallyAttoseconds are a billionth of a billionth of a second. To give a little perspective, there are around twice as many attoseconds in a single second as there have been seconds in the 13.8-billion year history of the universe.
