Article
Multidisciplinary Sciences
Nastaran Allahyari, Amir Kargaran, Ali Hosseiny, G. R. Jafari
Summary: This study investigates the gene-gene interaction networks of Saccharomyces cerevisiae beyond pairwise interactions using the structural balance theory. The results show that balanced and unbalanced triadic interactions are over and underrepresented in both essential and nonessential gene networks, and there is a significant difference in the energy distribution of triads between these networks and shuffled networks. Additionally, the study finds that triads in the essential gene network are more interconnected through sharing common links, while in the nonessential network they tend to be isolated.
Article
Physics, Multidisciplinary
Timur V. Tscherbul, Jun Ye, Ana Maria Rey
Summary: We propose a general protocol for generating robust entangled states of nuclear and/or electron spins of ultracold polar molecules using electric dipolar interactions. By encoding a spin-1/2 degree of freedom in a combined set of spin and rotational molecular levels, we theoretically demonstrate effective spin-spin interactions enabled by efficient magnetic control over electric dipolar interactions. These interactions can be used to create long-lived cluster and squeezed spin states.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Physical
Dario Massa, Alberto Ambrosetti, Pier Luigi Silvestrelli
Summary: The text discusses the description of long-ranged van der Waals interactions in large molecules and nanoscale systems, mentioning the effects of beyond-dipole interactions and many-body contributions, as well as the impact of many-body and multipolar terms on vdW interactions.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Multidisciplinary Sciences
Yuanzhi Li, Margaret M. Mayfield, Bin Wang, Junli Xiao, Kamil Kral, David Janik, Jan Holik, Chengjin Chu
Summary: The study highlights the importance of higher-order interactions (HOIs) in influencing tree performance in a temperate forest, specifically in mitigating the competitive direct effects of neighbors on focal trees. This provides a foundation for future investigations into the prevalence and relative importance of HOIs in global forests and their impact on species diversity.
NATIONAL SCIENCE REVIEW
(2021)
Article
Optics
Giovanni Scala, Karolina Slowik, Paolo Facchi, Saverio Pascazio, Francesco Pepe
Summary: The study investigates the Rabi model with permanent atomic electric dipole moments, comparing the emission intensities induced by various interaction terms to identify their significance in different parameter regimes. The analysis reveals that the emission strength related to permanent dipoles may surpass that due to counter-rotating terms but is generally weaker than that due to resonant coupling. This ratio can be altered by reducing dimensionality or engineering the energy spectral density of the continuum.
Article
Multidisciplinary Sciences
Jun-Ru Li, Kyle Matsuda, Calder Miller, Annette N. Carroll, William G. Tobias, Jacob S. Higgins, Jun Ye
Summary: We demonstrate tunable itinerant spin dynamics using a gas of potassium-rubidium molecules confined to two-dimensional planes, where a spin-1/2 system is encoded into the molecular rotational levels. The dipolar interaction gives rise to a shift of the rotational transition frequency and a collision-limited Ramsey contrast decay that emerges from the coupled spin and motion. Both the Ising and spin-exchange interactions are precisely tuned by varying the strength and orientation of an electric field, as well as the internal molecular state.
Article
Multidisciplinary Sciences
Andreas Schindewolf, Roman Bause, Xing-Yan Chen, Marcel Duda, Tijs Karman, Immanuel Bloch, Xin-Yu Luo
Summary: Ultracold polar molecules, with their strong electric dipole moments and rich internal structure, offer great potential for exploring exotic quantum matter, implementing quantum information schemes, and testing the fundamental symmetries of nature. However, the unstable collisions between molecules have so far prevented direct cooling to quantum degenerate states. In this study, we demonstrate evaporative cooling of fermionic sodium-potassium molecules to temperatures well below the Fermi temperature using microwave shielding.
Article
Physics, Multidisciplinary
Fulin Deng, Xing-Yan Chen, Xin-Yu Luo, Wenxian Zhang, Su Yi, Tao Shi
Summary: We show analytically that the interaction potential between microwave-shielded polar molecules consists of a shielding core and a modified dipolar interaction. The validity of this effective potential is confirmed by comparing its scattering cross sections with those calculated using the full intermolecular potential. Our results demonstrate the possibility of inducing a scattering resonance under current microwave field conditions. Using the effective potential, we also study the Bardeen-Cooper-Schrieffer pairing in microwave-shielded NaK gas and find a significant enhancement in the superfluid critical temperature near the resonance. These findings open up new paths for exploring the many-body physics of ultracold gases with microwave-shielded molecular gases.
PHYSICAL REVIEW LETTERS
(2023)
Article
Mechanics
Christoph Feinauer, Carlo Lucibello
Summary: Pairwise models like the Ising model or the generalized Potts model have been successfully applied in various fields, while the problem of inverse statistical mechanics aims to infer the parameters of such models from observed data. One open question is how to train these models when data contain higher-order interactions not present in the pairwise model. Proposed a hybrid model approach combining pairwise models and neural networks, showing significant improvements in reconstructing pairwise interactions. Results indicate that hybrids models can retain advantages of both simple interpretable models and complex black-box models.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2021)
Article
Chemistry, Multidisciplinary
Carlo Bravin, Justyna A. Piekos, Giulia Licini, Christopher A. Hunter, Cristiano Zonta
Summary: Research has shown that aromatic stacking interactions play a crucial role in chemical and biological systems. Due to their strong dependence on orientation and solvent, as well as relatively small interaction energies, evaluating and rationalizing these interactions remains a challenge for experimental and theoretical chemists.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Quantum Science & Technology
Jessie T. Zhang, Lewis R. B. Picard, William B. Cairncross, Kenneth Wang, Yichao Yu, Fang Fang, Kang-Kuen Ni
Summary: Researchers have extended the molecular assembly technique to an array of five molecules, enabling control and manipulation of multiple molecules and unlocking the ability to study molecular interactions. They have outlined the technical challenges and solutions inherent in scaling up this system, providing a platform to utilize the vast resources and long-range dipolar interactions of molecules.
QUANTUM SCIENCE AND TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Xuchen Shan, Fan Wang, Dejiang Wang, Shihui Wen, Chaohao Chen, Xiangjun Di, Peng Nie, Jiayan Liao, Yongtao Liu, Lei Ding, Peter J. Reece, Dayong Jin
Summary: Optical tweezers are widely used in various fields, including materials assembly, characterization, biomechanical force sensing, and cell and organ manipulation. A new technology using a resonance effect to enhance the permittivity and polarizability of nanocrystals has been developed, allowing for significantly stronger optical trapping forces for low-refractive-index nanoparticles. The use of lanthanide doping shows great potential in controlling the refractive index of nanomaterials for intracellular manipulation of organelles and integration with other optical technologies.
NATURE NANOTECHNOLOGY
(2021)
Article
Mechanics
Subhabrata Das, Joel Koplik, Ponisseril Somasundaran, Charles Maldarelli
Summary: This study examines the hydrodynamic interaction between identical spherical colloids on a planar gas/liquid interface, calculating drag coefficients based on separation distance and immersion depth. The results show that normalized coefficients increase with a decrease in separation, but remain bounded at contact, while coefficients for in-tandem motion decrease with decreasing separation, eventually collapsing to match the drag coefficient for two particles moving in tandem in an infinite medium.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Chemistry, Physical
Mattia Anzola, Anna Painelli
Summary: The physics of aggregates of polar and polarizable donor-acceptor dyes is discussed, with a model proposed to calculate exact absorption and fluorescence spectra for aggregates with up to 6 molecules. The two-step procedure involves a mean-field solution to define the excitonic basis and a diagonalization of the aggregate Hamiltonian for exact results, showing reliable description of aggregates in weak coupling and importance of ultraexcitonic effects in medium-strong coupling regimes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Physics, Multidisciplinary
Sean Burchesky, Loic Anderegg, Yicheng Bao, Scarlett S. Yu, Eunmi Chae, Wolfgang Ketterle, Kang-Kuen Ni, John M. Doyle
Summary: Coherence times of rotational state qubits of laser-cooled CaF molecules in optical tweezer traps are reported, demonstrating potential as high fidelity qubits. Improvement in coherence time is suggested through further cooling and suppression of inhomogeneous broadening by tuning tweezer polarization and applied magnetic field to a magic angle. A single spin-echo pulse can extend coherence time to nearly half a second.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Volker Dohm, Stefan Wessel
Summary: The study focuses on the exact critical Casimir amplitude for anisotropic systems, demonstrating the validity of multiparameter universality and the nonuniversality of the critical Casimir amplitude. Unexpected complexities in anisotropy effects are revealed, further proving the self-similarity of anisotropic systems.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Volker Dohm, Stefan Wessel, Benedikt Kalthoff, Walter Selke
Summary: Researchers have verified recent analytic predictions derived from anisotropic phi(4) theory and conformal field theory regarding the critical free energy amplitude of finite anisotropic systems in the two-dimensional Ising universality class through high-precision Monte Carlo simulations, finding remarkable agreement between the experimental data and the theoretical predictions. This study supports the validity of multiparameter universality and refutes the validity of two-scale-factor universality, while also comparing the results with exact results in the three-dimensional phi(4) model with planar anisotropy and briefly discussing the critical Casimir amplitude.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2021)
Article
Multidisciplinary Sciences
J. Larrea Jimenez, S. P. G. Crone, E. Fogh, M. E. Zayed, R. Lortz, E. Pomjakushina, K. Conder, A. M. Laeuchli, L. Weber, S. Wessel, A. Honecker, B. Normand, Ch. Rueegg, P. Corboz, H. M. Ronnow, F. Mila
Summary: The article discusses first-order phase transitions and critical point concepts in water and quantum materials, exploring both continuous and discontinuous phase transitions in quantum spin systems. The study shows that critical-point physics in pure spin systems can be confirmed through pressure and magnetic field control in geometrically frustrated quantum antiferromagnets.
Article
Multidisciplinary Sciences
Pagnareach Tin, Michael J. Jenkins, Jie Xing, Nils Caci, Zheng Gai, Rongyin Jin, Stefan Wessel, J. Krzystek, Cheng Li, Luke L. Daemen, Yongqiang Cheng, Zi-Ling Xue
Summary: This study demonstrates that NiBO is a rare two-dimensional metal-organic framework (MOF) Haldane topological material with potential quantum applications.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Jozef Strecka, Katarina Karl'ova, Taras Verkholyaka, Nils Caci, Stefan Wessel, Andreas Honecker
Summary: The thermal phase transitions of a spin-1/2 Ising-Heisenberg model on the diamond-decorated square lattice in a magnetic field are studied using decoration-iteration transformation and classical Monte Carlo simulations. The model is mapped exactly onto an effective classical Ising model on the square lattice with temperature-dependent interactions and magnetic field strength. The existence of discontinuous reentrant phase transitions within a narrow parameter regime is reported and explained in terms of the low-energy excitations from both phases. These exact results are verified by classical Monte Carlo simulations of the effective model.
Article
Materials Science, Multidisciplinary
Nils Caci, Peter Muhlbacher, Daniel Ueltschi, Stefan Wessel
Summary: We quantitatively characterize weakly first-order thermal phase transitions in three-dimensional spin-one quantum magnets out of planar spin-nematic states using Poisson-Dirichlet distributions (PDs) and large-scale quantum Monte Carlo calculations. The thermal melting of the nematic state is identified to be a weakly first-order transition based on thermal properties and the distribution of the nematic order parameter, contrary to previous claims. Exact results for the order parameter distribution and Binder cumulants at the discontinuous melting transition are obtained through PD calculations. Our findings establish the thermal melting of planar spin-nematic states as a generic platform for quantitative approaches to weakly first-order phase transitions in quantum systems with a continuous SU(2) internal symmetry.
Article
Materials Science, Multidisciplinary
Lukas Weber, Antoine Yves Dimitri Fache, Frederic Mila, Stefan Wessel
Summary: In this study, we examine the ground-state phase diagram and thermal phase transitions of a plaquettized fully frustrated bilayer spin-1/2 Heisenberg model. We find a first-order quantum phase transition line separating two competing quantum-disordered ground states, which have dominant singlet formations on interlayer dimers and plaquettes, respectively. At finite temperatures, this line extends to form a wall of first-order thermal transitions, terminating in a line of thermal critical points. A perturbative approach reveals a quadratic suppression of the critical temperature scale in the strongly plaquettized region. Based on free-energy arguments, we obtain the full phase boundary of the low-temperature dimer-singlet regime, which agrees well with quantum Monte Carlo data.
Article
Materials Science, Multidisciplinary
Alexander Sushchyev, Stefan Wessel
Summary: This study investigates the thermodynamic properties of the extended Hubbard model on a half-filled square lattice in the Slater regime at intermediate coupling using finite-temperature determinantal quantum Monte Carlo simulations. The effects of both nearest-neighbor interactions and long-range Coulomb interactions are considered, and a recently proposed scenario regarding a first-order metal-insulator transition in this interaction regime is assessed.
Article
Materials Science, Multidisciplinary
Lukas Weber, Nils Caci, Stefan Wessel
Summary: In this study, we employ spin trimer-based cluster quantum Monte Carlo simulations to investigate the thermodynamic properties of two-dimensional frustrated quantum antiferromagnets. Our results show that by choosing an appropriate computational basis, we can significantly reduce the sign problem of quantum Monte Carlo and study the thermodynamic behavior of two different lattice models.
Article
Physics, Fluids & Plasmas
Michael F. Herbst, Benjamin Stamm, Stefan Wessel, Matteo Rizzi
Summary: This article presents a methodology for investigating phase diagrams of quantum models using the reduced basis method. The method significantly reduces computational complexity and demonstrates accuracy in two test cases.
Article
Materials Science, Multidisciplinary
Nils Caci, Lukas Weber, Stefan Wessel
Summary: In this study, the thermal properties of the spin-1 Heisenberg antiferromagnet on the honeycomb lattice were examined, with a focus on the effects of an easy-plane single-ion anisotropy and an additional weak in-plane easy-axis anisotropy. Large-scale quantum Monte Carlo simulations were used to analyze the correlation length scaling near the thermal phase transition into the ordered phase. The research demonstrates that despite the presence of additional in-plane easy-axis anisotropy, characteristic easy-plane physics can still be observed above the critical temperature, particularly near a Berezinskii-Kosterlitz-Thouless transition.
Article
Materials Science, Multidisciplinary
E. S. Klyushina, J. Reuther, L. Weber, A. T. M. N. Islam, J. S. Lord, B. Klemke, M. Mansson, S. Wessel, B. Lake
Summary: The study revealed that BaNi2V2O8 behaves as a two-dimensional antiferromagnet across the entire temperature range, with different behavior patterns emerging as the temperature increases. Close to the ordering temperature TN, the system behaves as a 2D XY antiferromagnet, while above TN, evidence of Berezinskii-Kosterlitz-Thouless behavior driven by vortex excitations was observed.
Article
Materials Science, Multidisciplinary
Michael Schuler, Stephan Hesselmann, Seth Whitsitt, Thomas C. Lang, Stefan Wessel, Andreas M. Laeuchli
Summary: The study investigates the fixed points and saddle low-energy spectra characteristics in the Dirac field theory, exploring the crossover behavior between different fixed points and quantum critical behavior in numerical simulations. Through exact diagonalization and quantum Monte Carlo simulations, the existence of the chiral Ising fixed point is validated, and the strong interaction's influence on the critical torus energy spectrum is demonstrated.
Article
Materials Science, Multidisciplinary
Lukas Weber, Stefan Wessel
Summary: This passage discusses the strongly enhanced spin correlations of dangling edge spins in two-dimensional quantum critical antiferromagnets, as well as the differences from classical theory, particularly in the case of the columnar dimer model. The study also reveals stark differences in bond correlations between spin-1/2 and spin-1 cases, and compares the scaling dimensions to recent theoretical predictions. While the predictions partially align with numerical data, they cannot completely explain the findings, further constraining the understanding of dangling edge correlations and surface phenomena in strongly correlated quantum systems.
Article
Physics, Multidisciplinary
Claudia Merger, Timo Reinartz, Stefan Wessel, Carsten Honerkamp, Andreas Schuppert, Moritz Helias
Summary: Networks with fat-tailed degree distributions often have hubs, nodes with high numbers of connections, crucial to the transition into a globally ordered network state. Higher order interaction effects counteract the self-feedback on hubs, highlighting their importance for the distinct onset of local versus global order in the network. This mechanism may be relevant for other systems with a strongly hierarchical underlying network structure.
PHYSICAL REVIEW RESEARCH
(2021)