JournalPTEP

Generalizing Poisson Algebra with Geometry

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

Atoms Trapped with Light Behave Like a Dissipative Quantum System

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

Non-real Energies with Real Effects in Exotic Condensed Matter Systems

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

A Quantum Description of Physical Systems with Non-real Energies

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

Using Pulsed Cold Neutrons to Measure Neutron Lifetime

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

Simulating Equilibrium Behavior of Quantum Fields with Time-evolving Classical Fields

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

A New Approach to Solving Periodic Differential Systems

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

Antimatter Matters: Making Sense of the Matter–Antimatter Asymmetry at Japan’s Belle-II Facility

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

The Thin Edge of Entanglement Wedges and Progress in Quantum Gravity

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

New Findings Hint Towards Existence of Kaonic Nuclei and Hyper-nuclei

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

What Happened to Antimatter?

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