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Quantum Anomaly in a Dirac Fermion System with Spacetime Dependent Mass
2022-4-27
Scientists investigate quantum anomalies in a system of Dirac fermions with spacetime dependent mass and show that the anomaly formulas can be expressed in terms of superconnections.
Theoretical Particle Physics
Elementary particles, fields, and strings
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Calculating Superconformal Index of 𝓝 = 4 Super-Yang-Mills Theory for Finite N
2022-2-22
The examination of AdS/CFT correspondence for finite N, where quantum gravitational effects become important, reveals that finite N corrections for the superconformal index can be reproduced as D-3 brane contributions.
Theoretical Particle Physics
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New Classification Theory for Topological Gapless Superconducting Nodes
2021-12-28
A new classification theory on topological superconducting gap nodes predicts two new gap structures emerging from a nonsymmorphic crystal symmetry and angular momentum.
Superconductivity
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Understanding Phase Transitions in Supersymmetric Quantum Electrodynamics With Resurgence Theory
2021-11-25
Using resurgence theory to describe phase transitions in quantum field theory shows that information on non-perturbative effects like phase transitions can be obtained from a perturbative series expansion.
Theoretical Particle Physics
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A New Look at Our Universe with Gravitational Wave Astronomy
2021-10-26
A new interdisciplinary collaborative project underscores the importance of combining theory with advanced observation techniques to understand gravitational waves and their sources, opening doors to new discoveries about the universe.
Astrophysics, cosmology, and geophysics
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Estimating Beta Decay Rates Better for Exotic Nuclei
2021-10-1
Physicists from Japan demonstrate an improved estimation of the beta decay rate in heavy nuclei by considering next-to-leading-order approximation for the electron wave function distorted by the Coulomb potential.
Nuclear physics
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Designing a New Space-borne Interferometer to Probe the History of Our Universe
2021-9-22
Scientists present a new design for a space-born laser interferometer that could detect gravitational waves below 10 Hz, letting us probe into new astrophysical phenomena.
Astrophysics, cosmology, and geophysics
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Generalizing Poisson Algebra with Geometry
2021-9-6
Using a differential geometric interpretation of Hamiltonian mechanics, a generalized Poisson bracket formulation is developed for a three-dimensional phase space characterized by a triplet of canonical variables.
Mathematical methods, classical and quantum physics, relativity, gravitation, numerical simulation, computational modeling
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Atoms Trapped with Light Behave Like a Dissipative Quantum System
2021-7-19
A team of researchers from Japan experimentally realize, for the first time, a dissipative, parity-time symmetric, many-body quantum system from ultracold atoms trapped in an optical lattice.
Mathematical methods, classical and quantum physics, relativity, gravitation, numerical simulation, computational modeling
Gases, plasmas, electric discharges, and beams
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PTEP SPECIAL SECTION
Non-real Energies with Real Effects in Exotic Condensed Matter Systems
2021-7-19
Scientists demonstrate the presence of non-Hermitian topological properties preserved under continuous physical deformations in strongly correlated systems in equilibrium, resulting from short-lived quanta of collective excitations.
Electron states in condensed matter
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PTEP SPECIAL SECTION
A Quantum Description of Physical Systems with Non-real Energies
2021-7-19
While quantum systems are traditionally described by Hermitian Hamiltonians, the formalism is extendable to a non-Hermitian description for systems that are dissipative or obey parity-time symmetry.
Mathematical methods, classical and quantum physics, relativity, gravitation, numerical simulation, computational modeling
Nuclear physics
Electron states in condensed matter
Gases, plasmas, electric discharges, and beams
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Using Pulsed Cold Neutrons to Measure Neutron Lifetime
2021-7-13
Scientists measure the lifetime of a neutron with pulsed neutron beams to explore the cause of a puzzling discrepancy in their previously measured lifetime.
Elementary particles, fields, and strings
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Simulating Equilibrium Behavior of Quantum Fields with Time-evolving Classical Fields
2021-4-5
A set of field configurations (replicas) reaches equilibrium of quantum field theory after real-time evolution obeying classical equations of motion.
Elementary particles, fields, and strings
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A New Approach to Solving Periodic Differential Systems
2021-3-29
Mathematicians and physicists are well acquainted with second-order ordinary differential equations (ODE), the most prominent of them being the class of equations that govern oscillatory motion.
Mathematical methods, classical and quantum physics, relativity, gravitation, numerical simulation, computational modeling
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Antimatter Matters: Making Sense of the Matter–Antimatter Asymmetry at Japan’s Belle-II Facility
2021-3-22
Scientists embark on a quest to unravel the mysteries behind matter–antimatter asymmetry in our universe with the new Belle-II experiment at the SuperKEKB accelerator in Japan.
Elementary particles, fields, and strings
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The Thin Edge of Entanglement Wedges and Progress in Quantum Gravity
2021-3-15
Scientists for the first time theoretically link quantum states and gravity, taking one step further in understanding the origins of gravity and opening doors to novel quantum applications.
Elementary particles, fields, and strings
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New Findings Hint Towards Existence of Kaonic Nuclei and Hyper-nuclei
2021-3-3
Scientists reveal a new feature in nuclear physics: the existence of kaonic nuclei and hyper-nuclei. These findings can enhance our understanding of nature and contribute to technological progress.
Nuclear physics
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What Happened to Antimatter?
2021-3-3
The Belle-II experiment is designed to explore new mechanisms of matter-antimatter asymmetry that may resolve the mystery behind the dominance of matter over anti-matter in the universe.
Elementary particles, fields, and strings