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name: Adrian Rubio | ||
first_name: Adrian | ||
last_name: Rubio | ||
asociation: Universidad de Santiago de Chile | ||
--- |
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name: Claudia Reyes | ||
first_name: Claudia | ||
last_name: Reyes | ||
asociation: University Medical Center Groningen | ||
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name: Joaquín Molina | ||
first_name: Joaquín | ||
last_name: Molina | ||
asociation: Pontificia Universidad Católica de Chile | ||
--- |
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name: Mateo Londoño | ||
first_name: Mateo | ||
last_name: Londoño | ||
asociation: Stony Brook University | ||
--- |
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--- | ||
name: Michael Reitz | ||
first_name: Michael | ||
last_name: Reitz | ||
asociation: University of California San Diego | ||
--- |
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name: Michael A. Michon | ||
first_name: Michael A. | ||
last_name: Michon | ||
asociation: US Naval Research Laboratory | ||
--- |
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name: Pietro de Checchi | ||
first_name: Pietro | ||
last_name: De Checchi | ||
asociation: University of Padova | ||
--- |
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--- | ||
name: Rubén Fritz | ||
first_name: Rubén | ||
last_name: Fritz | ||
asociation: Universidad de Santiago de Chile | ||
#status: invited | ||
--- |
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name: Stochastic resonant behaviours and steady state control in harmonic systems | ||
speakers: | ||
- Adrian Rubio | ||
categories: | ||
- Talk | ||
--- | ||
Brownian motion and parametric resonance are two paradigmatic phenomena particularly | ||
taking place on harmonic dynamical systems, covering a plethora of branches in science. | ||
While the former gives a pathway to include dissipation and noise (additive noise) in a | ||
system, the latter stands for a physical mechanism that supplies energy to a system by | ||
exploiting the resonant variation of the characteristic frequency. Both aspects find their | ||
syncretism in the so-called stochastic resonance, where the competition between dissipation | ||
and the strength of the fluctuations in the characteristic frequency of the system | ||
(multiplicative noise) defines whether the system undergoes exponential growth (as in | ||
parametric resonance) or stabilises in a steady state in the long-time limit[1]. Typically, the | ||
impact of this competition is neglected due to relatively high dissipation rates that | ||
overcome resonant effects. However, the development of harmonic systems with | ||
increasingly quality factors makes this competition to come into play, raising as a potential | ||
limiting factor but also as a possibility for a novel control mechanism. In this talk, I will | ||
introduce the basics of the mentioned dynamical phenomena to quantify its impact on | ||
experimental setups, such as optically levitated nanoparticle. Moreover, I will also show | ||
how these concepts enter interacting harmonic systems, giving place to enhanced resonant | ||
behaviours in the steady state. The latter can be exploited, for instance, for heat transport | ||
and thermalisation[2]. | ||
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[1] B. J. West, K. Lindenberg and V. Seshadri, Physica 102A, pp. 470-488 (1980). | ||
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[2] A. E. Rubio Lopez and F. Herrera, Stochastic resonant behaviours and steady state | ||
control in harmonic systems, in preparation. |
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name: Diamond-based quantum sensing for free radical detection in cells and tissues | ||
speakers: | ||
- Claudia Reyes | ||
categories: | ||
- Talk | ||
--- | ||
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Diamond-based quantum sensing, through the use of nitrogen vacancy (NV) centers | ||
embedded in diamond crystals, has revolutionized the study of cellular biology by | ||
providing unprecedented capabilities in free radical sensing [1,2]. This groundbreaking | ||
technique, known as relaxometry, leverages the unique properties of NV centers to translate | ||
magnetic noise into optical signals, achieving remarkable sensitivity and nanoscale spatial | ||
resolution. | ||
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The ability of relaxometry to detect free radical production within living cells is pivotal for | ||
understanding various biological processes. For example, this technology has illuminated | ||
the role of free radicals in sperm development [3] and provided real-time, subcellular | ||
monitoring of their involvement in cancer cell migration [4], offering critical insights into | ||
metastatic mechanisms. | ||
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Moreover, diamond-based quantum sensing paves the way for exploring complex | ||
biological samples, including tissues and entire organisms, with NV centers. Despite the | ||
potential, challenges such as particle control, reproducibility, and biocompatibility must be | ||
overcome to fully harness this technology. | ||
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In summary, diamond-based quantum sensing represents a transformative advancement in | ||
the detection and characterization of free radicals within living cells, offering profound | ||
implications for our comprehension of cellular dynamics, disease progression, and the | ||
essential roles of free radicals in biological systems. | ||
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[1] Mzyk A, Sigaeva A, Schirhagl R. Relaxometry with Nitrogen Vacancy (NV) Centers in Diamond. Acc | ||
Chem Res. 2022 Dec 20;55(24):3572-3580. | ||
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[2] Nie, L., Nusantara, A. C., Damle, V. G., Sharmin, R., Evans, E. P. P., Hemelaar, S. R., Van Der Laan, K. | ||
J., Li, R., Martinez, F. P. P., Vedelaar, T., Chipaux, M., & Schirhagl, R. (2021). Quantum monitoring of | ||
cellular metabolic activities in single mitochondria. Science Advances, 7(21). | ||
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[3] Reyes-San-Martin, C., Hamoh, T., Zhang, Y., Berendse, L., Klijn, C., Li, R., Llumbet, A. E., Sigaeva, A.,Kawałko, J., Mzyk, A., & Schirhagl, R. (2022). Nanoscale MRI for selective labeling and localized free radical measurements in the acrosomes of single sperm cells. ACS Nano, 16(7), 10701–10710. | ||
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[4] Reyes-San-Martin, C., Elías-Llumbet, A., Escobar-Chaves, E., Manterola, M., Mzyk, A., & Schirhagl, R. (2024). Diamond-based quantum sensing of free radicals in migrating human breast cancer cells. Carbon, 228, 119405. |
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--- | ||
name: Isomerization Reactions in Quantum Computers | ||
speakers: | ||
- Joaquín Molina | ||
categories: | ||
- Talk | ||
--- | ||
Quantum computers can solve a wide range of computational problems, including | ||
molecular optimization and simulations. An effective approach to harnessing the | ||
capabilities of quantum computing is the Variational Quantum Eigensolver (VQE), an | ||
algorithm that combines quantum and classical resources to determine the minimum | ||
energy of molecules. In this work, we apply the VQE algorithm to explore molecular | ||
electronic structures, focusing on the simulation of molecular configurations and | ||
isomerization reactions by using currently available quantum computers. | ||
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References: | ||
[1] Arute, F., Arya, K., Babbush, R. et al. Quantum supremacy using a programmable | ||
superconducting processor. Nature 574, 505–510 (2019). | ||
https://doi.org/10.1038/s41586-019-1666-5 | ||
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[2] Peruzzo, A., McClean, J., Shadbolt, P., Yung, M.H., Zhou, X.Q., Love, P., | ||
Aspuru-Guzik, A., & O’Brien, J. (2014). A variational eigenvalue solver on a | ||
photonic quantum processor. Nature Communications, 5(1). |
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name: Ultracold long-range Van der Waals Rydberg trimers | ||
speakers: | ||
- Mateo Londono | ||
categories: | ||
- Talk | ||
--- | ||
Ultracold Rydberg atoms and dipolar molecules are groundbreaking tools for advancing | ||
quantum information protocols [1] and exploring novel quantum phases [2] due to their | ||
large dipole moments and long-range interactions [3]. This work demonstrates the potential | ||
to create ultracold, long-range Van der Waals Rydberg trimers within a cold Rydberg- | ||
molecule hybrid system. Our approach uses a two-photon association scheme that drives atom-diatom collisions into bound Rydberg-diatom states, with estimated photoassociation rates between 10-13 and 10-11 cm3 s-1 and binding energies ranging from 10-2 to 102 μK. | ||
The resulting Van de Waals trimer has lengths of thousands of Bohr radius. This opens the | ||
possibility of investigating new quantum complexes in ultracold regimes within current | ||
experimental achievements [4]. | ||
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[1] Browaeys, A. & Lahaye, T. Many-body physics with individually controlled Rydberg | ||
atoms. Nat. Phys. 16, 132–142 (2020). | ||
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[2] Karman, T., Tomza, M. & Pérez-Ríos, J. Ultracold chemistry as a testbed for few-body | ||
physics. Nat. Phys. 20, 722–729 (2024). | ||
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[3] Olaya, V., Pérez-Ríos, J. & Herrera, F. C6 coefficients for interacting rydberg atoms and | ||
alkali-metal dimers. Phys. Rev. A 101, 032705 (2020) | ||
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[4] Bigagli, N. et al. Collisionally stable gas of bosonic dipolar ground-state molecules. | ||
Nat. Phys. 19, 1579–1584, (2023). |
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name: Impact of Cavity Length Non-Uniformity on Reaction Rate Extraction in Strong Coupling Experiments | ||
speakers: | ||
- Michael Michon | ||
categories: | ||
- Talk | ||
--- | ||
Reports of altered chemical phenomena under vibrational strong coupling (VSC), including | ||
reaction rates, product distributions, intermolecular forces, and cavity-mediated vibrational | ||
energy transfer, have been met with a great deal of skepticism due to several irreproducible | ||
results and the lack of an accepted theoretical framework. In this work, we add some | ||
insight by identifying a UV-vis measurement artifact that distorts observed absorption peak | ||
positions, amplitudes, and consequently, chemical reaction rates extracted in optical | ||
microcavities. We predict and characterize the behavior of this artifact using the Transfer | ||
Matrix (TM) method and confirm its presence experimentally. We then present a correction | ||
technique whereby an effective molar absorption coefficient is assigned to an absorbing | ||
species within the cavity. These revelations have important implications for many existing | ||
examples of cavity-modified chemistry and establishing best practices for carrying out | ||
robust future investigations. | ||
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[1] Michon, M.; Simpkins, B.; Impact of Cavity Length Non-Uniformity on Reaction Rate | ||
Extraction in Strong Coupling Experiments. J Am Chem Soc 2024 (accepted manuscript) |
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name: Nonlinear semiclassical spectroscopy of ultrafast molecular polariton dynamics | ||
speakers: | ||
- Michael Reitz | ||
categories: | ||
- Talk | ||
--- | ||
We introduce a theoretical framework that allows for the systematic and efficient description of the ultrafast nonlinear response of molecular polaritons, i.e., hybrid light-matter states, in particular in the limit of large numbers of molecules N coupled to the cavity mode. Our approach is based on a semiclassical, mean-field evolution of the molecular Hamiltonian and the cavity field [1], complemented by a perturbative expansion of both light and matter counterparts in the input pulses entering the cavity. This formalism can be regarded as an extension of traditional free-space nonlinear spectroscopy, now | ||
incorporating the feedback of matter onto the light field via the induced polarization. We | ||
demonstrate the utility of the framework by applying it to the calculation of the pump-probe | ||
polariton response and in multidimensional coherent polariton spectroscopy [2]. | ||
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[1] P. Fowler-Wright, B. W. Lovett, and Jonathan Keeling, Phys. Rev. Lett. 129 (2022) | ||
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[2] M. Reitz, A. Koner, and J. Yuen-Zhou, in preparation (2024) |
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name: Sum-Frequency Spectro-Microscopy to Image Infrared Materials Excitations | ||
speakers: | ||
- Niclas Mueller | ||
categories: | ||
- Talk | ||
--- | ||
Nonlinear optical microscopy and spectroscopy are powerful tools to characterize | ||
interfaces and lower-dimensional materials. Here, I show two examples how we use | ||
infrared + visible sum-frequency generation to image mid-infrared materials | ||
excitations with wide-field optical microscopy. The techniques provide combined | ||
spatial and spectral information. 1. We visualize the propagation patterns of infrared | ||
phonon polaritons in a metasurface of silicon carbide (Fig. 1a-c) [1]. Through a | ||
combination of microscopy and spectroscopy, we observe the hybridization and strong | ||
coupling of propagating and localized polaritons. 2. We visualize monolayers of | ||
hexagonal boron nitride on an insulating substrate (Fig. 1d). This material is usually | ||
optically invisible because of its large band gap. Resonant infrared excitation of | ||
phonons and heterodyne sum-frequency imaging enable us to image, both, its | ||
topography and crystal orientation. | ||
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[1] Niemann, Mueller et al. Advanced Materials 36, 2312507 (2024) |
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