Diffraction unlimited all-optical recording of electron spin resonances

We show stimulated emission depletion microscopy to break the diffraction limit in the all-far-field-optical detection of magnetic fields and resonances. Electron spin resonances from single nitrogen-vacancy centers in diamond located at subdiffraction proximities are fully discerned. Since diffraction is overcome by disallowing the signaling state through an optical transition such as stimulated emission, the spin state remains unaffected and amenable to microwave manipulation. Stimulated emission depletion presents a universal scheme for superresolving spin resonances detectable by fluorescence.     

Tables of unit groups and class groups of quintic fields and a regulator bound

Using a new regulator bound we determine unit groups and class groups of the 289040 quintic algebraic number fields with absolute discriminant less than (totally real fields), respectively (other signatures). We list significant data.

     

Combining UK and German emissions monitoring proficiency testing data based on stack simulator facilities to determine whether increasingly stringent EU emission limits are enforceable

Accreditation and Quality Assurance - We report an examination of the capability of the existing measurement infrastructure in the industrial emissions sector for successfully enforcing emission...