Tag: Atomic and Molecular Physics, and Optics
Single fluxonium qubit shows microwave EIT, delay, and storage
What the study found A single fluxonium qubit in a microwave waveguide showed electromagnetically induced transparency (EIT), a slowdown of light with a delay time of 217 ns, and photon storage. Why the authors say this matters The authors conclude that these results highlight potential use of the system as a phase shifter or quantum…
Defective atomic lattice enables unidirectional reflection lasing
—
in OpticsWhat the study found The study reports a scheme for mode-tunable unidirectional reflection lasing using a coherent gain atomic system and a one-dimensional defective atomic lattice. The authors describe this as a single system that combines nonreciprocity and lasing oscillation. Why the authors say this matters The authors say the approach could improve the efficiency…
Mie void cavities show polaritonic spectra under resonant loading
—
in OpticsWhat the study found The study found that spherical Mie void cavities, including the inverse case of a void inside a resonant dispersive medium, can be analyzed for their resonant characteristics and polaritonic spectra. The authors report approximate analytical expressions for the Q-factors of these cavities and identify parameter ranges associated with weak and strong…
Structured light enables control of optical chirality and spin
What the study found A single tunable parameter can link Pancharatnam topology to paraxial spin-orbit coupling, allowing control of optical chirality and spin angular momentum (SAM, the spin part of light’s angular momentum). Why the authors say this matters The authors conclude that this provides a simple and material-independent route to generate and control optical…
Silica nanoparticles were tested for release and recapture in microgravity
What the study found The study demonstrated the feasibility of optical trapping setups for silica nanoparticles in microgravity for the first time. It also reports system performance and first release-recapture experiments in which the particle was no longer trapped. Why the authors say this matters The authors say levitated optomechanics, which uses trapped particles for…
Frictional contact model adds thermal effects in colloidal simulations
What the study found The study derives a thermodynamically consistent model for frictional contacts in colloidal systems, including the correct fluctuation-dissipation relation for both linear and nonlinear instantaneous frictional contact interactions. The authors also introduce a generalized class of dissipative particle dynamics (DPD, a simulation thermostat method) thermostats with rotation-translation coupling. Why the authors say…
Yb:Ca3TaGa3Si2O14 laser achieved 50 fs mode-locked pulses
—
in OpticsFirst mode-locked laser using Yb:Ca3TaGa3Si2O14 crystal achieves 50 fs pulses with high efficiency, demonstrating potential for ultrafast solid-state laser systems.
Nonlocal media support dark, antidark, and mixed soliton pairs
Researchers identify two families of vector soliton pairs in nonlocal nonlinear systems, including novel mixed-polarity solutions with symmetry-breaking structure.
Calcium isotope selectivity was increased with polarized resonance ionization
—
Selective resonance ionization technique using angular momentum selection rules and polarized light enables isolation of rare calcium isotopes Ca-43 and Ca-41 while suppressing abundant Ca-40.
Accurate rovibrational levels for He2 a3Σu+ state match spectroscopy
High-precision rovibrational computations for He2 a 3Σu+ state incorporating relativistic, QED, and nonadiabatic corrections with sub-ppm potential energy curve accuracy.
