Abstract We demonstrate a new generation mechanism for polarisation- sukrensi.com and colour-entangled photon pairs.In our approach we tailor the phase-matching of a periodically poled KTP crystal such that two downconversion processes take place simultaneously.Relying on this effect, our source emits entangled bipartite photon states, emerging int
We study the incredibleindiatourtravels.com controllability of a central spin guided by a classical field and interacting with a spin bath and show that the central spin is fully controllable independently of the number of bath spins.Additionally we find that for unequal system-bath couplings even the bath becomes controllable by acting on the cent
Reliable techniques to generate accurate data sets of human built-up areas at national, regional, and global scales are a key factor to monitor the implementation progress of the Sustainable Development Goals as defined by the United Nations.However, the scarce availability of accurate and up-to-date human settlement data remains a major challenge,
The risk of sudden infant death syndrome (SIDS) among infants who co-sleep in the absence of hazardous circumstances is unclear and needs to be quantified.Combined individual-analysis of two population-based case-control studies of SIDS infants and controls comparable for age and time of last sleep.Parents of 400 SIDS infants and 1386 controls prov