Entangled Light Boosts Sensing Of Material Stress Beyond Known Limits

For years, detecting subtle changes in material properties has demanded near-perfect measurement tools, restricting widespread use of sensitive interferometry. Now, a hyper-entangled SU(1,1) interferometer offers enhanced birefringence sensing without those limitations, potentially improving material characterisation by 3-15dB. This new design circumvents previous detector requirements, broadening the scope of applications needing precise stress or structural analysis. Scientists are continually striving to enhance the precision of interferometric sensing, a technique vital for applications ranging from imaging to lithography, and now Samata Gokhale and Netanel P. Yaish, working with colleagues at the Department of... [6841 chars]