An Optical System Defies Conventional Band Theory

Squeezed wave functions reshape an open quantum system’s
bulk-boundary properties and generate a new class of parity-time
symmetry. Read more in APS Physics…

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Polarized light shows hot gas swirling around a galactic core

The images of galaxy Messier 87 provide evidence of magnetic field lines in its innermost region. Those lines likely trace the event horizon of a supermassive black hole. Read more in Physics Today…

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Large systems can be controllably entangled and limitlessly measured

A mechanical oscillator has quantum properties that can be directly observed. Read more in APS Physics…

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Light Pulses Change Speed in a Plasma

Interactions between two laser beams in a plasma allow for precise
control over the light’s velocity. Read more in APS Physics…

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Do Merging Dwarf Galaxies Explain a Peculiar Gravitational-Wave Detection?

The hard-to-explain masses of two coalescing black holes could be accounted for if they were the central black holes in two distant, tiny galaxies that merged. Read more in APS Physics…

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Linking Glaciers on Earth to the Climate on Mars

Geophysicist Jack Holt explains how Earth’s debris-covered glaciers can teach us about the climate history of Mars. Read more in APS Physics…

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Cubes Keep Their Distance

Cubes suspended in a liquid are less likely than spheres to form clusters and fall out of solution. Read more in APS Physics…

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Counting All the Antistars in the Sky

Analyzing gamma-ray sources leads to an upper limit on how many antimatter stars could exist in the Milky Way. Read more in APS Physics…

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Laser-Cooled Atoms and Molecules Collide in a Trap

An experiment shows the circumstances under which ultracold atoms are quick to kick molecules out of a trap, providing clues for how to use atoms as a refrigerant for molecules. Read more in APS Physics…

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Ancient lightning may have provided the phosphorus necessary for life

On early Earth, lightning strikes created glassy rocks that hosted abundant soluble minerals, which were rich in phosphorus, a vital ingredient in biomolecules. Read more in Physics Today…

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