Article
Chemistry, Physical
Luca Bizzocchi, Silvia Alessandrini, Mattia Melosso, Cristina Puzzarini
Summary: This study introduces the use of dipolar spin-spin coupling constants as an additional source of structural information to support the standard SE approach. Testing this new strategy on prototypical species such as water, ammonia, phosphine, and their fluorinated counterparts, the results indicate that using dipolar spin-spin coupling constants can improve accuracy and reduce correlations among geometric parameters, even when a large set of isotopic rotational constants is available.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Marija Nikolic Stevanovic, Jelena Lj. Dinkic, Antonije R. Djordjevic
Summary: An algorithm for localizing and estimating electrically small targets using sparse processing framework and vector electric-field measurements has been developed. Equivalent electric and magnetic dipoles are used to model the sources of the electromagnetic field, with l(1) regularization applied to find their locations and complex amplitudes. The method includes a normalization scheme and an algorithm to find the optimal regularization coefficient, leading to improved numerical stability and performance.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Multidisciplinary Sciences
Aurel Holzschuh, Anita Lerch, Inna Gerlovina, Bakar S. Fakih, Abdul-wahid H. Al-mafazy, Erik J. Reaves, Abdullah Ali, Faiza Abbas, Mohamed Haji Ali, Mohamed Ali Ali, Manuel W. Hetzel, Joshua Yukich, Cristian Koepfli
Summary: A highly multiplexed PCR sequencing method was developed to investigate the genetic structure of malaria parasites in Zanzibar, providing actionable insights for malaria elimination efforts.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Michael Faley, Yuchen Liu, Rafal E. Dunin-Borkowski
Summary: The article describes nanobridge Josephson junctions and nanoSQUIDs based on TiN thin films, which exhibit high superconducting transition temperatures and coherence lengths. The fabricated nano-devices show stable characteristics, offering new prospects for superconducting electronics.
Article
Quantum Science & Technology
Tingting Zhai, Matteo Mazzola, Demetrio Macias, Rafael Salas-Montiel
Summary: Integrated single photon sources are crucial for quantum computing, simulation, communication, and photonic neural networks. Recently, researchers have developed topology-optimized couplers to enhance the coupling of orthogonal dipoles, improving the coupling efficiency and electromagnetic local density of states (LDOS).
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Physics, Applied
M. Faley, H. Fiadziushkin, B. Frohn, P. Schuffelgen, R. E. Dunin-Borkowski
Summary: This study reports the fabrication and characterization of titanium nitride nanobridge Josephson junctions and nanoscale superconducting quantum interference devices on SiN-buffered Si substrates. The use of titanium nitride allows for reproducible preparation and long-term stability of the devices. The variable thickness shape of the nanobridge junctions is achieved through wet etching and reactive ion etching. The results pave the way for superconducting electronics and all-TiN qubits operating at sub-100 mK temperatures.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Physics, Fluids & Plasmas
Vaibhav Mohanty, Ard A. Louis
Summary: Investigated the robustness of spin glasses in the glassy phase, finding high robustness and topological properties that scale similarly to other systems.
Article
Physics, Multidisciplinary
Man Jiao, Maosen Guo, Xing Rong, Yi-Fu Cai, Jiangfeng Du
Summary: Improved laboratory limits on the exotic spin- and velocity-dependent interaction at the micrometer scale were established using a single electron spin quantum sensor, showing significant improvement in constraints and reaching an upper limit of the coupling at 200 mu m.
PHYSICAL REVIEW LETTERS
(2021)
Article
Astronomy & Astrophysics
Jinyang Li, Gregorio R. M. da Silva, Schuyler Kain, Jason Bonacum, David D. Smith, Timothy Kovach, Selim M. Shahriar
Summary: In this paper, we theoretically investigate the feasibility of using off resonant Raman transitions to apply spin squeezing to a light pulse atom interferometer in the presence of large momentum transfer, in order to enhance the sensitivity of accelerometry close to the Heisenberg limit. We also demonstrate how this scheme can be implemented in a dual-species atom interferometer for a precision test of the equivalence principle by measuring the Eotvos parameter, and identify the optimal spin squeezing protocol for such an experiment. For a space borne platform in low Earth orbit, this scheme may eventually enable the measurement of the Eotvos parameter with a sensitivity of the order of 10-20 within 150 days when 105 atoms are employed in each cycle of the experiment.
Article
Chemistry, Organic
Brandon M. Young, Paolo Rossi, P. Jake Slavish, Yixin Cui, Munia Sowaileh, Jitendra Das, Charalampos G. Kalodimos, Zoran Rankovic
Summary: Isotopically labeled amino acids are commonly used for studying protein structure and dynamics by NMR. This study presents a facile gram-scale synthesis of compounds 1b and 2b under standard laboratory conditions from a common intermediate. The improved signal intensity with lower amounts of labeled precursor makes 1b and 2b potential alternatives to current labeling approaches.
Article
Biochemistry & Molecular Biology
Alice Michel, Riana Minocher, Peter-Philip Niehoff, Yuhong Li, Kevin Nota, Maya A. Gadhvi, Jiancheng Su, Neetha Iyer, Amy Porter, Urbain Ngobobo-As-Ibungu, Escobar Binyinyi, Radar Nishuli Pekeyake, Laura Parducci, Damien Caillaud, Katerina Guschanski
Summary: This study investigates the interplay between diet and gut microbiome in three geographically isolated populations of the critically endangered Gorilla beringei graueri. The findings show population- and social group-specific dietary and gut microbial profiles and covariation between diet and gut microbiome. Diet differences may be influenced by plant availability.
Article
Multidisciplinary Sciences
Sebastian Geier, Nithiwadee Thaicharoen, Clement Hainaut, Titus Franz, Andre Salzinger, Annika Tebben, David Grimshandl, Gerhard Zurn, Matthias Weidemuller
Summary: Controlling interactions is crucial in quantum engineering of many-body systems. By applying time-periodic driving, a natural many-body Hamiltonian can be transformed into an effective target Hamiltonian with different dynamics. Demonstration in an experimental setting shows modification of relaxation behavior of total spin by changing symmetry properties of the effective Hamiltonian through spin manipulations.
Article
Materials Science, Multidisciplinary
Seyed M. Sadeghi, Waylin Wing, Rithvik R. Gutha, Christina Sharp, Dustin Roberts, Chuanbin Mao
Summary: The study explores the transfer of excitation polarization memory of quantum dots to their spontaneous emission using metal-oxide plasmonic double-junction structures consisting of metallic nanoantenna arrays and heterostructures. The results demonstrate that with such double-junction structures, one can control the polarization states and intensity of quantum dots emission using the polarization state of an off-resonant laser field.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Astronomy & Astrophysics
Garvin Yim, D. Jones
Summary: It has been reported recently that there is a group of 'glitch candidates' and 'antiglitch candidates' which are small spin-ups and spin-downs of a neutron star, with magnitudes smaller than typical glitches. The physical origin of these small events is not yet understood. This paper proposes a model that can explain the changes in spin and can be independently tested using gravitational wave observations. The model suggests that small spin-up/spin-down events are caused by the excitation and decay of non-axisymmetric f-modes that radiate angular momentum away as gravitational waves. The model takes the change in spin frequency as input and outputs the initial mode amplitude and signal-to-noise ratio achievable from gravitational wave detectors. It is found that this model will become falsifiable once third generation gravitational wave detectors, like the Einstein Telescope and Cosmic Explorer, begin collecting data.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Ecology
Kevin S. White, Taal Levi, Jessica Breen, Meghan Britt, Justin Merondun, Daria Martchenko, Yasaman N. Shakeri, Boyd Porter, Aaron B. A. Shafer
Summary: Obtaining field data and analytical methods for wildlife population conservation and management are significant challenges, especially for species in difficult-to-reach landscapes or small, isolated populations. Integrating genetic and non-genetic data can enhance understanding of population dynamics. Studying a low-density mountain goat population, genetic and morphologic data indicated demographically isolated peninsular subpopulations and influenced sustainable harvest quotas. The importance of using genetic and morphologic data, along with demographic modeling, in delineating population boundaries and dynamics for small, isolated populations was highlighted.
JOURNAL OF WILDLIFE MANAGEMENT
(2021)