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Articles by Interdisciplinary Theoretical
Jet from Binary Neutron Star Merger with Prompt Black Hole Formation
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The evolution of host exploitation by parasitoid wasps: the timing of attack and consumption
Abstract In some parasitoid wasp species, larvae consume their host immediately after hatching ("idiobiont"), while in other species, larvae delay the consumption of the host until its maturation ("koinobiont"). The delayed emergence is a life-history trait associated with numerous life-history traits including lifespan and body size. Consequently, the evolution of delayed emergence has been studied as an explanation for the diversity of life-history strategies in parasitoid wasps.
How can interspecific pollen transfer affect the coevolution and coexistence of two closely related plant species?
Introduction Transfer of pollen grains commonly occurs between co-flowering plant species with shared pollinators that flower at the same time and place (Waser 1978, Morales and Traveset 2008, Moreira-Hernández and Muchhala 2019). This process is called interspecific pollen transfer (IPT) (Moreira-Hernández and Muchhala 2019). IPT can potentially lower female reproductive success by reducing seed set.
Simulating Floquet scrambling circuits on trapped-ion quantum computers
Complex quantum many-body dynamics spread initially localized quantum information across the entire system. Information scrambling refers to such a process whose simulation is one of the promising applications of quantum computing. We demonstrate the Hayden-Preskill recovery protocol and the interferometric protocol for calculating out-of-time-ordered correlators to study the scrambling property of a one-dimensional kicked-Ising model on 20-qubit trapped-ion quantum processors.
The evolution of host utilization strategy: At what timing parasitoids attack and consume their host
Abstract In some parasitoid wasp species, larvae consume their host immediately after hatching (''idiobiont''), while in other species, larvae delay the consumption of the host until its maturation (''koinobiont''). The timing at which wasps' larvae start consuming the host after the attack, referred to as Parasitoid Emerging Timing (PET) in this article, is a life-history trait that is correlated to other life history traits (e.g., lifespan and body size).
Constraints on the parameter space in dark matter admixed neutron stars
We investigate the impact of dark matter on neutron star properties using the relativistic mean-field theory. By incorporating the dark matter model, we explore how dark matter parameters, specifically dark matter mass and Fermi momentum, influence nuclear saturation properties, the equation of state, and the mass-radius relationship of neutron stars. We also examine the universal relation between dimensionless tidal deformability and compactness in the presence of dark matter.
Universal Bound on Effective Central Charge and Its Saturation
The effective central charge (denoted by ceff) is a measure of entanglement through a conformal interface, while the transmission coefficient (encoded in the coefficient cLR of the two-point function of the energy-momentum tensor across the interface) is a measure of energy transmission through the interface. It has been pointed out that these two are generally different. In this Letter, we propose the inequalities, 0≤cLR≤ceff≤min(cL,cR).
Probing the goldstino excitation through tunneling transport in a Bose-Fermi mixture with explicitly broken supersymmetry
We theoretically investigate the tunneling transport in a repulsively interacting ultracold Bose-Fermi mixture. A two-terminal model is applied to such a mixture, and the supersymmetry-like tunneling current through the junction can be induced by the bias of the fermion chemical potential between two reservoirs.
Order of the $SU({N}_{f})\ifmmode\times\else\texttimes\fi{}SU({N}_{f})$ chiral transition via the functional renormalization group
Renormalization group flows of the SU(Nf)×SU(Nf) symmetric Ginzburg-Landau potential are calculated for a general number of flavors, Nf. Our approach does not rely on the ε expansion, but uses the functional renormalization group, formulated directly in d=3 spatial dimensions, with the inclusion of all possible (perturbatively) relevant and marginal operators, whose number is considerably larger than those in d=4.
Couplings of torsional and shear oscillations in a neutron star crust
Mature neutron stars are thought to be sufficiently cold that nuclei in the outer layers freeze, solidifying a crust. Crustal elasticity allows the star to support a set of seismic modes, such as torsional oscillations. These axial-parity modes can couple to the polar sector in a number of ways, for example via rotation or a magnetic field. Even in a static, spherically symmetric star, however, these modes can couple at nonlinear order.
Universality in supernova gravitational waves with protoneutron star properties
Gravitational wave signals from core-collapse supernovae are one of the important observables for extracting the information of dense matter. To extract the properties of protoneutron stars produced via core-collapse supernovae by asteroseismology, we perform a linear perturbation analysis using data obtained from two-dimensional numerical simulations. We employ 12 and 20 solar-mass progenitors and compare two different treatments of gravity.
Remark on neutrino oscillations
Eur. Phys. J.
Multipole and fracton topological order via gauging foliated symmetry protected topological phases
Spurred by the recent development of fracton topological phases, unusual topological phases possessing fractionalized quasiparticles with mobility constraints, the concept of symmetries has been renewed. In particular, in accordance with the progress of multipole symmetries, associated with conservation of multipoles, such as dipole or quadruple moments as well as global charges, there have been proposed topological phases with such symmetries.
Mass spectrum of spin-one hadrons in dense two-color QCD: Novel predictions by extended linear sigma model
We construct an extended version of the linear sigma model in such a way as to describe spin-1 hadrons as well as spin-0 hadrons in two-color QCD (QC2D) by respecting the Pauli-Gürsey SU(4) symmetry. Within a mean-field approximation, we therefrom examine a mass spectrum of the spin-1 hadrons at finite quark chemical potential (μq) and zero temperature. Not only mean fields of scalar mesons and scalar-diquark baryons but also of vector mesons and vector-diquark baryons are incorporated.
Designing quantum annealing schedules using Bayesian optimization
We propose and analyze the use of Bayesian optimization techniques to design quantum annealing schedules with minimal user and resource requirements. We showcase our scheme with results for two paradigmatic spin models. We find that Bayesian optimization is able to identify schedules resulting in fidelities several orders of magnitude better than standard protocols for both quantum and reverse annealing, as applied to the p-spin model.
Non-Hermitian $p$-wave superfluid and effects of the inelastic three-body loss in a one-dimensional spin-polarized Fermi gas
We theoretically investigate non-Hermitian p-wave Fermi superfluidity in one-dimensional spin-polarized Fermi gases which is relevant to recent ultracold atomic experiments. Considering an imaginary atom-dimer coupling responsible for the three-body recombination process in the Lindblad formalism, we discuss the stability of the superfluid state against the atomic loss effect.
Magnonic spin-current shot noise in an itinerant Fermi gas
Spin transport phenomena at strongly correlated interfaces play central roles in fundamental physics as well as spintronic applications. To anatomize spin-transport carriers, we propose the detection of the spin-current noise in interacting itinerant fermions. The Fano factor given by the ratio between the spin current and its noise reflects elementary carriers of spin transport at the interface of spin-polarized Fermi gases realized in ultracold atoms.
General corner charge formulas in various tetrahedral and cubic space groups
In some insulators, corner charges are fractionally quantized, due to the topological invariant called a filling anomaly. The previous theories of fractional corner charges have been mostly limited to two-dimensional systems. In three dimensions, only limited cases have been studied. In this study, we derive formulas for the filling anomaly and the corner charge in various crystals with all the tetrahedral and cubic space groups.
Shear oscillations in neutron stars and the nuclear symmetry energy
The shear and interface modes excited inside the neutron star due to the presence of elasticity depend on the properties of both the crust and core region. To examine how such eigenfrequencies depend on the neutron star properties, we solve the eigenvalue problem by adopting the relativistic Cowling approximation.
Universal entanglement signatures of interface conformal field theories
Abstract An interface connecting two distinct conformal field theories hosts rich critical behaviors. In this paper, we investigate the entanglement properties of such critical interface theories for probing the underlying universality. As inspired by holographic perspectives, we demonstrate vital features of various entanglement measures regarding such interfaces based on several paradigmatic lattice models.
Doubly Charmed Tetraquark ${T}_{cc}^{+}$ from Lattice QCD near Physical Point
The doubly charmed tetraquark Tcc+ recently discovered by the LHCb Collaboration is studied on the basis of (2+1)-flavor lattice QCD simulations of the D*D system with nearly physical pion mass mπ=146 MeV.
Spin transport between polarized Fermi gases near the ferromagnetic phase transition
We theoretically study the spin current between two polarized Fermi gases with repulsive interactions near the itinerant ferromagnetic phase transition. We consider a two-terminal model where the left reservoir is fixed to be fully polarized while the polarization of the right reservoir is tuned through a fictitious magnetic field defined by the chemical-potential difference between different atomic hyperfine states.
Effectiveness of quantum annealing for continuous-variable optimization
The application of quantum annealing to the optimization of continuous-variable functions is a relatively unexplored area of research. We test the performance of quantum annealing applied to a one-dimensional continuous-variable function with a rugged energy landscape.
Universality in quasinormal modes of neutron stars with quark-hadron crossover
We examine the gravitational wave frequencies of the fundamental (f-) and first pressure (p1-) modes excited in the neutron star models constructed with the quark-hadron crossover (QHC)-type equations of state (EOSs). We find that the f-mode frequencies with QHC EOS basically are smaller and the p1-mode frequencies with QHC EOS are larger than those with hadronic EOS, focusing on the neutron star model with a fixed mass.
GRB optical and X-ray plateau properties classifier using unsupervised machine learning
The division of gamma-ray bursts (GRBs) into different classes, other than the ‘short’ and ‘long’, has been an active field of research. We investigate whether GRBs can be classified based on a broader set of parameters, including prompt and plateau emission ones. Observational evidence suggests the existence of more GRB subclasses, but results so far are either conflicting or not statistically significant.
EOS-dependent millihertz quasi-periodic oscillation in low-mass X-ray binary
We studied the frequency and critical mass accretion rate of millihertz quasi-periodic oscillations (mHz QPOs) using a one-zone X-ray burst model. The surface gravity is specified by two kinds of equation of states: neutron star (NS) and strange star (SS). The base flux, Q , is set in the range of 0–2 MeV nucleon−1. It is found that the frequency of mHz QPO is positively correlated to the surface gravity but negatively to the base heating.
Shear and interface modes in neutron stars with pasta structures
Abstract We carefully examine the shear and interface modes, which are excited due to the presence of crust elasticity, in neutron stars with pasta structures, adopting the relativistic Cowling approximation. We find that the shear modes are independent of the presence of the cylindrical-hole and spherical-hole nuclei at least up to a few kilohertz, while the interface modes strongly depend on the presence of the cylindrical-hole and spherical-hole nuclei.
Brueckner $G$-matrix approach to two-dimensional Fermi gases with finite-range attractive interactions
Abstract Two-dimensional spin-1/2 fermions with finite-range interactions are theoretically studied. Characterizing the attractive interaction in terms of the scattering length and the effective range, we discuss the finite-range effects on the ground-state properties in this system.
Spin conductivity spectrum and spin superfluidity in a binary Bose mixture
Abstract We investigate the spectrum of spin conductivity for a miscible two-component Bose-Einstein condensate (BEC) that exhibits spin superfluidity. By using the Bogoliubov theory, the regular part being the spin conductivity at finite ac frequency and the spin Drude weight characterizing the δ-function peak at zero frequency are analytically computed.
Non-Hermitian topological Fermi superfluid near the $p$-wave unitary limit
Abstract We discuss theoretically the non-Hermitian superfluid phase transition in one-dimensional two-component Fermi gases near the p-wave Feshbach resonance accompanied by the two-body loss associated with dipolar relaxation.
Empirical neutron star mass formula based on experimental observables
Abstract We derive the empirical formulas expressing the mass and gravitational redshift of a neutron star, whose central density is less than threefold the nuclear saturation density, as a function of the neutron-skin thickness or the dipole polarizability of Pb208 or Sn132, especially focusing on the eight Skyrme-type effective interactions.
Self-learning Monte Carlo for non-Abelian gauge theory with dynamical fermions
Abstract In this paper, we develop the self-learning Monte-Carlo (SLMC) algorithm for non-Abelian gauge theory with dynamical fermions in four dimensions to resolve the autocorrelation problem in lattice QCD. We perform simulations with the dynamical staggered fermions and plaquette gauge action by both in the hybrid Monte-Carlo (HMC) and SLMC for zero and finite temperature to examine the validity of SLMC.
Probing the hadron mass spectrum in dense two-color QCD with the linear sigma model
Abstract We investigate modifications of hadron masses at finite quark chemical potential in two-flavor and two-color QCD, data of which are available from lattice simulations, within a linear sigma model based on approximate Pauli-Gursey SU(4) symmetry.
Quasinormal modes of Schwarzschild black holes on the real axis
Abstract We study the scattering of gravitational waves by a Schwarzschild black hole and its perturbed siblings to investigate influences of proposed spectral instability of quasinormal modes on the ringdown signal. Our results indicate that information of dominant ringdown signals, which are ascribed to the fundamental (i.e., least damping) quasinormal mode of unperturbed Schwarzschild black holes, is imprinted in the phase shift defined from the transmission amplitude (1/Ain in our notation).
Convergence condition of simulated quantum annealing for closed and open systems
Abstract Simulated quantum annealing is a generic classical protocol to simulate some aspects of quantum annealing and is sometimes regarded as a classical alternative to quantum annealing in finding the ground state of a classical Ising model. We derive a generic condition for simulated quantum annealing to converge to thermal equilibrium at a given, typically low, temperature. Both closed and open systems are treated.
Optical spin conductivity in ultracold quantum gases
Abstract We show that the optical spin conductivity, which is a small ac response of a bulk spin current and elusive in condensed matter systems, can be measured in ultracold atoms. We demonstrate that this conductivity contains rich information on quantum states by analyzing experimentally achievable systems such as a spin-12 superfluid Fermi gas, a spin-1 Bose-Einstein condensate, and a Tomonaga-Luttinger liquid.
Nonperturbative waveguide quantum electrodynamics
Abstract Understanding physical properties of quantum emitters strongly interacting with quantized electromagnetic modes is one of the primary goals in the emergent field of waveguide quantum electrodynamics (QED).
Matrix-Model Simulations Using Quantum Computing, Deep Learning, and Lattice Monte Carlo
Abstract Matrix quantum mechanics plays various important roles in theoretical physics, such as a holographic description of quantum black holes, and it underpins the only practical numerical approach to the study of complex high-dimensional supergravity theories. Understanding quantum black holes and the role of entanglement in a holographic setup is of paramount importance for the realization of a quantum theory of gravity.
Goldstone boson scattering with a light composite scalar
Abstract The appearance of a light composite 0+ scalar resonance in nearly conformal gauge-fermion theories motivates further study of the low energy structure of these theories. To this end, we present a nonperturbative lattice calculation of s-wave scattering of Goldstone bosons in the maximal-isospin channel in SU(3) gauge theory with Nf=8 light, degenerate flavors.
Construction of energy density functional for arbitrary spin polarization using functional renormalization group
COVID-19 has impacted many institutions and organizations around the world, disrupting the progress of research. Through this difficult time APS and the Physical Review editorial office are fully equipped and actively working to support researchers by continuing to carry out all editorial and peer-review functions and publish research in the journals as well as minimizing disruption to journal access.
Topological quantum matter in synthetic dimensions
Abstract In the field of quantum simulation of condensed matter phenomena by artificially engineering the Hamiltonian of an atomic, molecular or optical system, the concept of synthetic dimensions has recently emerged as a powerful way to emulate phenomena such as topological phases of matter, which are now of great interest across many areas of physics.
Topological photonics
Journals Physical Review Letters Physical Review X PRX Energy PRX Quantum Reviews of Modern Physics Physical Review A Physical Review B Physical Review C Physical Review D Physical Review E Physical Review Research Physical Review Accelerators and Beams Physical Review Applied Physical Review Fluids Physical Review Materials Physical Review Physics Education Research Physical Review Physical Review (Series I) Physics Physique Fizika Physics Magazine Help/Feedback Log in Abstract Topological...
Non-sinusoidal waveform in temperature-compensated circadian oscillations
Abstract Time series of biological rhythms are of various shapes. Here we investigated the waveforms of circadian rhythms in gene-protein dynamics, using newly developed index to quantify the degree of distortion from a sinusoidal waveform. In general, most biochemical reactions accelerate with increasing temperature, but the period of circadian rhythms remains relatively stable with temperature change, a phenomenon known as “temperature compensation”.
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