Engineering Field-Insensitive Molecular Clock Transitions for Symmetry Violation Searches.

Molecules are a powerful platform to probe fundamental symmetry violations beyond the standard model, as they offer both large amplification factors and robustness against systematic errors. As experimental sensitivities improve, it is important to develop new methods to suppress sensitivity to external electromagnetic fields, as limits on the ability to control these fields are a major experimental concern. Here we show that sensitivity to both external magnetic and electric fields can be simultaneously suppressed using engineered radio frequency, microwave, or two-photon transitions that maintain large amplification of CP-violating effects.

Doppler-free Spectroscopy of Buffer-Gas-Cooled Calcium Monohydroxide.

In this study, we report the Doppler-free spectra of buffer-gas-cooled CaOH. We observed five Doppler-free spectra containing low- Q and R transitions, which were only partially resolved by previous Doppler-limited spectroscopies. The spectra frequencies were corrected using the Doppler-free spectra of iodine molecules; accordingly, the uncertainty was estimated to be below 10 MHz.

High-resolution spectroscopy of buffer-gas-cooled phthalocyanine.

For over five decades, studies in the field of chemical physics and physical chemistry have primarily aimed to understand the quantum properties of molecules. However, high-resolution rovibronic spectroscopy has been limited to relatively small and simple systems because translationally and rotationally cold samples have not been prepared in sufficiently large quantities for large and complex systems. In this study, we present high-resolution rovibronic spectroscopy results for large gas-phase molecules, namely, free-base phthalocya-nine (FBPc).

Fibrophrys columna gen. nov., sp. nov: A member of the family Amphifilidae.

A novel Diplophrys-like organism, Fibrophrys columna, was isolated from Hiuchigaike Pond in Japan. F. columna showed a nearly orbicular or broadly elliptical cell shape and has fine filamentous, branching ectoplasmic elements emanating from both polar ends of the cell.

Diplophrys mutabilis sp. nov., a new member of Labyrinthulomycetes from freshwater habitats.

Diplophrys is a ubiquitous protist genus belonging to the class Labyrinthulomycetes. Although most members of Labyrinthulomycetes prefer marine habitats, the genus Diplophrys exclusively consists of the freshwater species Diplophrys archeri and Diplophrys parva. To investigate the genus Diplophrys, several novel strains were isolated from Japanese freshwater environments, and cultures of the strains were established.