Variable motorway speed limits have been in place in the United Kingdom on some routes for years now. Despite being controversial in some circles, these have clear benefits for modern motoring, as ...

Speed limits are a subject of constant discussion across America, and because of decentralized state regulation over the limits, there can be a wide variance in limits from state to state. Arizona, ...

Abstract: Continuous variable quantum key distribution (CV-QKD) is arising as an attractive technology for quantum secure communications in future optical networks, thanks to its higher compatibility ...

Abstract: Continuous-variable quantum key distribution (CV-QKD) has great potential in terms of high secret key rate, especially in short distance. The current research on high secret key rate mainly ...