Article
Materials Science, Multidisciplinary
S. Verret, A. Foley, D. Senechal, A. -M. S. Tremblay, M. Charlebois
Summary: This paper discusses whether the low-doping Fermi surface of cuprates is composed of hole pockets or disconnected Fermi arcs. The study finds that current calculations cannot provide a definitive answer to this question, and different periodization schemes may lead to different results.
Article
Materials Science, Multidisciplinary
Wilhelm G. F. Krueger, Lukas Janssen
Summary: The article discusses a gapless U(1) spin liquid state with spinon Fermi pockets in two dimensions, which may be the most promising candidate to describe the exotic field-induced behavior observed in numerical simulations of the antiferromagnetic Kitaev honeycomb model.
Article
Physics, Applied
O. Gomonay, D. Bossini
Summary: This study focuses on the dynamics of domain walls in anti-ferromagnetic materials in the presence of magnetoelasticity, showing that it affects both equilibrium magnetic structure and dynamical properties. Experimental results are compared with model outputs, confirming the significant impact of domain walls on optically driven ultrafast nonlinear spin dynamics.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Mechanics
Y. Wang, D. S. Dean, S. Marbach, R. Zakine
Summary: Understanding particle motion in narrow channels is crucial for various applications. Introducing repulsive interactions between Brownian tracers in fluid-filled channel leads to an effective flow field, enhancing tracer dispersion. Our mechanism challenges the notion that crowding effects tend to reduce diffusion and is expected to apply to various systems.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Materials Science, Multidisciplinary
Vladislav Pokorny, Martin Zonda
Summary: We present two complementary methods to calculate the Andreev bound state energies of a single-level quantum dot connected to superconducting leads. The first method is based on a mapping to a low-energy model and can extract the energies from quantum Monte Carlo data. The second method maps the full model to an exactly solvable atomic limit, providing a fast and reliable way to explore the parameter space.
Article
Biodiversity Conservation
Gian Marco Palamara, Alejandro Rozenfeld, Charles N. de Santana, Jan Klecka, Rodrigo Riera, Victor M. Eguiluz, Carlos J. Melian
Summary: This study examines the impact of fluctuations in landscape connectivity on biodiversity dynamics. The results show that local and regional species richness can increase together in dynamic landscapes, and fluctuations in connectivity can increase the overall number of coexisting species. This clarifies the empirical findings of high biodiversity in both low and high-connected landscapes.
Article
Chemistry, Physical
Spencer Sillaste, Russell B. Thompson
Summary: A density functional theory based on polymer self-consistent field theory is capable of accurately predicting molecular bonding in systems of two atoms. The theory successfully identifies the formation of homonuclear diatomic molecules for elements from hydrogen up to neon, as well as the stability of heteronuclear molecules CO and HF under ambient conditions. Most of the bond lengths agree well with experimental results, although deviations are observed for O-2 and F-2.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Article
Chemistry, Physical
Noriyoshi Arai, Eiji Yamamoto, Takahiro Koishi, Yoshinori Hirano, Kenji Yasuoka, Toshikazu Ebisuzaki
Summary: We propose a water pump that transports water molecules through nanochannels by utilizing spatially asymmetric thermal fluctuations. The pump achieves unidirectional water flow without osmotic pressure by exploiting hysteresis in the cyclic transition between wetting and drying states. Our study demonstrates that various types of fluctuations, including white, Brownian, and pink noises, affect the water transport process. The proposed pump operates through fast switching of open and close states to inhibit channel wetting in the presence of white noise, while pink and Brownian noises generate high-pass filtered net flow.
NANOSCALE HORIZONS
(2023)
Article
Chemistry, Analytical
Chanchal Rani, Manushree Tanwar, Tanushree Ghosh, Suchita Kandpal, Devesh K. Pathak, Anjali Chaudhary, Priyanka Yogi, Shailendra K. Saxena, Rajesh Kumar
Summary: This study demonstrates the use of temperature dependent Raman spectromicroscopy to determine the position and temperature associated Fermi shift in an extrinsic semiconductor, silicon. The Raman line-shape parameters, quantifying the Fano-coupling, are used to reveal the value of the Fermi energy and its thermal shift.
ANALYTICAL CHEMISTRY
(2022)
Article
Nanoscience & Nanotechnology
Sergei A. Egorov, Robert A. Evarestov
Summary: In this work, a theoretical study of magnetically-induced Pekar-Rashba spin splitting in antiferromagnetic monolayers of both layered and nonlayered crystals is presented. A detailed two-step procedure for determining the magnetic layer group of a given monolayer is outlined, and all magnetic layer groups are classified into seven spin splitting prototypes. Based on symmetry arguments, it is possible to determine whether spin splitting is allowed in a given monolayer, with the magnitude of the spin splitting determined through Density Functional Theory calculations if allowed. Illustrative examples using both layered (MnPS3) and nonlayered (MnO2) crystals are provided.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Physics, Multidisciplinary
Andrey Kudlis, Amnon Aharony, Ora Entin-Wohlman
Summary: This study investigates a system with two order parameters and finds that there is often a first-order flop line separating two phases with non-zero order parameters. For n = 3 and d = 3, the flop line terminates at a bicritical point, which exhibits a crossover from isotropic universal critical behavior to a fluctuation-driven first-order transition. By expanding the renormalization group recursion relations and resumming the sixth-order diagrammatic expansions of the coefficients, the study explains the apparently observed second-order transition and reveals the variations in effective critical exponents near the triple point.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2023)
Article
Physics, Mathematical
Luca Fresta, Marcello Porta, Benjamin Schlein
Summary: This study investigates the quantum evolution of many-body Fermi gases in three dimensions, considering both non-relativistic and relativistic dispersion particles. The focus is on the high-density regime and a class of initial data describing zero-temperature states. In the non-relativistic case, the many-body evolution of the reduced one-particle density matrix converges to the solution of the time-dependent Hartree equation in short macroscopic times as the density approaches infinity. In the case of relativistic dispersion, the many-body evolution converges to the relativistic Hartree equation for all macroscopic times. The rate of convergence depends only on the density, allowing for the study of extensive many-body Fermi gases' quantum dynamics.
COMMUNICATIONS IN MATHEMATICAL PHYSICS
(2023)
Article
Chemistry, Physical
Alexander M. Berezhkovskii, Attila Szabo
Summary: The article discusses particle drift velocity fluctuations due to transitions among discrete states or due to diffusion in a confined moving fluid, and outlines a method for calculating the effective diffusivity. Analytical expressions are provided for effective diffusivity under specific conditions, recovering classic results for Taylor dispersion and cargo transport along microtubules.
JOURNAL OF PHYSICAL CHEMISTRY B
(2021)
Article
Materials Science, Multidisciplinary
Alexey Milekhin
Summary: This paper investigates the relationship between residual entropy and branch cuts in the large N limit and concludes that for generic fermionic systems in the mean-field approximation, a branch cut in the two-point function does lead to a lower bound for the entropy.
Review
Ecology
Masato Yamamichi, Andrew D. Letten, Sebastian J. Schreiber
Summary: Growing evidence suggests that temporally fluctuating environments play a crucial role in maintaining variation within and between species. However, studies of genetic variation within populations have been primarily conducted by evolutionary biologists, while population and community ecologists have focused more on species diversity. This article reviews theoretical and empirical studies in population genetics and community ecology, exploring the connection between the "temporal storage effect" and diversity maintenance. By comparing and synthesizing ecological and evolutionary approaches, the authors aim to enhance our understanding of diversity maintenance in nature.
Article
Physics, Multidisciplinary
Rhine Samajdar, Darshan G. Joshi, Yanting Teng, Subir Sachdev
Summary: Strongly interacting arrays of Rydberg atoms provide versatile platforms for exploring exotic many-body phases and dynamics of correlated quantum systems. Motivated by recent experimental advances, we show that the combination of Rydberg interactions and appropriate lattice geometries naturally leads to emergent Z(2) gauge theories endowed with matter fields. We also discuss the natures of the fractionalized excitations of these Z(2) spin liquid states using both fermionic and bosonic parton theories and illustrate their rich interplay with proximate solid phases.
PHYSICAL REVIEW LETTERS
(2023)
Article
Multidisciplinary Sciences
Haoyu Guo, Darshan G. Joshi, Subir Sachdev
Summary: In this study, we calculate the thermal Hall coefficient of phonons scattering off a defect with multiple energy levels. Our results show that the perturbative contribution in the phonon-defect coupling is proportional to the phonon lifetime and has a side-jump interpretation. We also find that the thermal Hall angle is independent of the phonon lifetime.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Physics, Multidisciplinary
Zheng Yan, Yan-Cheng Wang, Rhine Samajdar, Subir Sachdev, Zi Yang Meng
Summary: We perform large-scale quantum Monte Carlo simulations on a realistic Hamiltonian of kagome-lattice Rydberg atom arrays and analyze their static and dynamic properties. We find emergent glassy behavior in a region of parameter space between two valence bond solid phases. The extent and phase transitions of this glassy phase as well as its slow time dynamics and experimental considerations for its detection are discussed. Our proposal opens up a new route to studying real-time glassy phenomena and highlights the potential for quantum simulation of distinct phases of quantum matter.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Multidisciplinary
Qiaoyi Li, Yuan Gao, Yuan-Yao He, Yang Qi, Bin -Bin Chen, Wei Li
Summary: In this study, a tangent space tensor renormalization group (tanTRG) approach is developed for the calculations of the 2D Hubbard model at finite temperature. tanTRG achieves an optimal evolution of the density operator with a mild computational complexity. The method is used to perform low-temperature calculations of large-scale 2D Hubbard systems and shows excellent agreement with the determinant quantum Monte Carlo (DQMC) method. It also allows exploration of the low-temperature, finite-doping regime inaccessible for DQMC. The results obtained reflect various behaviors such as strange metal and pseudogap, as well as d-wave pairing responses near optimal doping.
PHYSICAL REVIEW LETTERS
(2023)
Article
Multidisciplinary Sciences
Maine Christos, Zhu-Xi Luo, Henry Shackleton, Ya-Hui Zhang, Mathias S. Scheurer, Subir Sachdev
Summary: Confined quantum spin liquid in hole-doped cuprates is described in this article. The spin liquid is described by a SU(2) gauge theory of Nf = 2 massless Dirac fermions. Confinement is argued to occur via the Higgs condensation of bosonic chargons carrying fundamental SU(2) gauge charges. At half-filling, there is a low-energy theory of the Higgs sector with Nb=2 relativistic bosons and an emergent SO(5)b global symmetry. A conformal SU(2) gauge theory with Nf=2 fundamental fermions, Nb=2 fundamental bosons, and a SO(5)f x SO(5)b global symmetry is proposed, which describes a deconfined quantum critical point.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Physics, Multidisciplinary
Xiaoyang Huang, Subir Sachdev, Andrew Lucas
Summary: Using holographic duality, this paper presents a controlled theory of quantum critical points without quasiparticles at finite disorder and finite charge density. The fixed points are obtained by perturbing a disorder-free quantum critical point with relevant disorder, and the critical exponents and thermoelectric transport coefficients are calculated.
PHYSICAL REVIEW LETTERS
(2023)
Article
Multidisciplinary Sciences
Aavishkar A. Patel, Haoyu Guo, Ilya Esterlis, Subir Sachdev
Summary: This study considers the coupling of two-dimensional metals with quantum critical scalars and finds that these metals exhibit strange metal behavior at low temperatures, characterized by a linear resistivity and a specific heat that follows a T ln(1/T) relationship. The study also provides an explanation for the theoretical bound on the transport scattering time.
Article
Materials Science, Multidisciplinary
Alexander Nikolaenko, Jonas von Milczewski, Darshan G. Joshi, Subir Sachdev
Summary: The pseudogap metal phase of hole-doped cuprates can be described by small Fermi surfaces of electronlike quasiparticles enclosing a volume violating the Luttinger relation. The existence of additional fractionalized excitations, considered as fractionalized remnants of the paramagnon, is required for this violation. A gauge theory is presented for the bosonic spinons, a Higgs field, and an ancilla layer of fermions coupled to the original electrons, fractionalizing the paramagnon into the spin liquid described by C P 1 U(1) gauge theory. It displays conventional phases, including the large Fermi surface Fermi liquid and phases with spin density wave order, along with the small Fermi surface pseudogap metal.
Article
Physics, Multidisciplinary
Chenyuan Li, Subir Sachdev, Darshan G. Joshi
Summary: We investigated models of electrons in the Sachdev-Ye-Kitaev class with random and all-to-all electron hopping, electron spin exchange, and Cooper-pair hopping. An attractive on-site interaction between electrons results in superconductivity at low temperatures. Depending on the relative strengths of the hopping and spin exchange, the normal state at the critical temperature can be either a Fermi-liquid or a non-Fermi liquid. We conducted a large-M study of the normal state to superconductor phase transition and described the transition temperature, the superconducting order parameter, and the electron spectral functions. We compared the effects of different normal states on the superconductivity emergence.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Xiaoxue Ran, Zheng Yan, Yan-Cheng Wang, Junchen Rong, Yang Qi, Zi Yang Meng
Summary: In this study, by using the sweeping cluster quantum Monte Carlo method, we reveal the complete ground state phase diagram of the fully packed quantum loop model on the square lattice. We find the emergence of a resonating plaquette phase between the lattice nematic (LN) phase and the staggered phase (SP), separated by a first-order transition and the Rokhsar-Kivelson point. Our renormalization group analysis is fully consistent with the order parameter histogram in Monte Carlo simulations. The realization and implication of our phase diagram in Rydberg experiments are proposed.
Article
Materials Science, Multidisciplinary
Xin Lu, Dai-Wei Qu, Yang Qi, Wei Li, Shou-Shu Gong
Summary: Inspired by recent studies on the t-J model, we systematically investigate the phase diagram of a two-leg t-J ladder with next-nearest-neighbor (NNN) couplings. We identify a Luther-Emery liquid (LEL) phase and two different Tomonaga-Luttinger liquid (TLL) phases, and find that the NNN couplings play a similar role as in the wider t-J cylinder. Our results provide insights into the emergence of the remarkable d-wave superconducting phase in the wider system.
Article
Physics, Multidisciplinary
Cole Miles, Rhine Samajdar, Sepehr Ebadi, Tout T. Wang, Hannes Pichler, Subir Sachdev, Mikhail D. Lukin, Markus Greiner, Kilian Q. Weinberger, Eun-Ah Kim
Summary: Machine learning is a promising approach for studying complex phenomena with rich datasets. This study introduces a hybrid-correlation convolutional neural network (hybrid-CCNN) and applies it to experimental data generated by a programmable quantum simulator. The hybrid-CCNN is able to discover and identify new quantum phases on square lattices with programmable interactions. This combination of programmable quantum simulators with machine learning provides a powerful tool for exploring correlated quantum states of matter.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Yuan Da Liao, Xiao Yan Xu, Zi Yang Meng, Yang Qi
Summary: This study extends the large-scale quantum Monte Carlo investigations of Dirac fermions with SU(6) and SU(8) symmetries subjected to plaquette interactions on a square lattice. The rich phase diagram exhibits various emerging quantum phases and phase transitions.
Article
Materials Science, Multidisciplinary
Yuan Da Liao, Xiao Yan Xu, Zi Yang Meng, Yang Qi
Summary: This study utilizes large-scale quantum Monte Carlo simulations to investigate correlated electron systems and discovers the presence of a Gross-Neveu quantum critical point and a Dirac quantum spin liquid. These findings have significant implications for quantum many-body theory and the understanding of experimental systems.
Article
Materials Science, Multidisciplinary
Yuan Da Liao, Xiao Yan Xu, Zi Yang Meng, Yang Qi
Summary: We investigate the ground state phase diagram of an extended Hubbard model with a pi-flux hopping term at half filling on a square lattice using large-scale auxiliary-field quantum Monte Carlo simulations. We find an intermediate phase with two interaction-driven quantum critical points, characterized by Gross-Neveu and deconfined quantum criticalities. We also study the dynamical properties of the spin excitation and find the spin gap opening and closing at the two transitions. The relevance of these findings to deconfined quantum criticality in fermion systems and lattice models with further extended interactions is discussed.
