Probing electron–phonon matrix elements in bulk materials is difficult. Now, an all-optical experimental approach is demonstrated that extracts phonon-mode- and electron-energy-resolved electron–phonon matrix elements in the bulk.
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Snakes are capable of non-planar gaits, such as sidewinding. Now observations of juvenile anacondas reveal another non-planar gait resembling an S shape. Calculations show how topological dynamics of active filaments enable such movements.
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Simultaneous spin squeezing and the detection of dynamic fields is challenging as entanglement generation and signal interrogation often interfere. An experiment now demonstrates stable spin squeezing and field tracking in a hot atomic ensemble.
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Placing particles at the interface between immiscible fluids usually enhances emulsification. However, now it is shown that if the particles are ferromagnetic, emulsification is suppressed and a non-planar recoverable interfacial shape develops.
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Fermi polarons are quasiparticles formed by impurities immersed in a Fermi gas. An experiment in an ultracold fermionic gas now shows how to control their properties with a tunable radio-frequency field.
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The discovery of a cue that underlies fatal blood clots in cancer patients offers a therapeutic target and a way to assess clot risk
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Spin models emulated by quantum simulators are usually restricted to systems with conserved total magnetization. The tuning of photon-mediated interactions between atoms in a cavity enables the implementation of more general models.
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Spatiospectral properties of redshifted free electron laser radiation
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If a dark matter analogue of electromagnetism exists, dark matter particles could experience attractive or repulsive forces. Researchers have now sought – and not found – evidence of such interactions in a pair of colliding galaxy clusters.
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Adding a soft, springy material to a solid projectile leads to a threefold increase in kinetic energy when the projectile is launched upward. This result from 2020 has implications for many sports in the Olympics, like the javelin throw and running.
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