The first-passage time, defined as the time a random walker takes to reach a target point in a confining domain, is a key quantity in the theory of stochastic processes. Its importance comes from its crucial role in quantifying the efficiency of processes as varied as diffusion-limited reactions, target search processes or the spread of diseases. Most methods of determining the properties of first-passage...
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Measurement noise 100 times lower than the quantum-projection limit using entangled atoms
Quantum metrology uses quantum entanglement—correlations in the properties of microscopic systems—to improve the statistical precision of physical measurements. When measuring a signal, such as the phase shift of a light beam or an atomic state, a prominent limitation to achievable precision arises from the noise associated with the counting of uncorrelated probe particles. This noise, commonly referred to as shot noise or projection noise,...
Measurement noise 100 times lower than the quantum-projection limit using entangled atoms
Quantum metrology uses quantum entanglement—correlations in the properties of microscopic systems—to improve the statistical precision of physical measurements. When measuring a signal, such as the phase shift of a light beam or an atomic state, a prominent limitation to achievable precision arises from the noise associated with the counting of uncorrelated probe particles. This noise, commonly referred to as shot noise or projection noise,...
Waze releases the best and worst times to drive over the holidays
Preparing to hit the I-5 to Grandma’s house? You’ll want to look at this data released by Waze. The navigation app has released the best and worst travel times for the next week at Conde Nast Traveler. “AAA predicts that the number of year-end holiday travelers...
New York Times’ latest VR video focuses on Paris vigils after the attacks
The latest New York Times video developed for its virtual reality app is focused on Paris vigils since last week’s terrorist attacks. In the video, the Times interviews several of the city’s residents, including one man whose friend died at the Bataclan, a concert he was also to attend before he decided not to go at the last minute....