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TIME CLOAK TO CONCEAL MESSAGES. "A “time cloak” that conceals events rather than objects can hide secret messages through a trick of light, making information invisible to all but the intended recipient. Like an invisibility cloak that makes something disappear in plain sight, a time cloak makes an event disappear in time. It works by manipulating light traveling along an optical fibre." https://lnkd.in/eAbVHjQ View in LinkedIn

A TIME LENS. "Such a time-lens can be made using an electro-optic modulator, for example, and has a variety of familiar properties. This time-lens can, for example, magnify or compress in time." https://lnkd.in/eVgKzAT View in LinkedIn

INTERESTING SEQUELAE. "Just as its easy to make a lens that focuses light in space using diffraction, so it is possible to use dispersion to make a lens that focuses in time." https://lnkd.in/eVgKzAT View in LinkedIn

MORE SCIENCE KNOWN in the last few years than in the history of mankind. The majority of scientists who shaped the world lived in the last 300 years. And the rate of change of knowledge approaches exponential growth. Remember the urban myth that the weight of science publications would soon exceed the weight of the earth? https://lnkd.in/eHareWj View in LinkedIn

FOOTNOTE. I am at a Synthetic Biology conference in London. All the talks are (matter-of-fact) about creating totally new life forms, totally new metabolic pathways totally new hybrid modular proteins by cut-and-paste, and making novel tissues and organs. We are now conducting directed evolution. Darwin would (possibly) be delighted. We live in exciting times. Very exciting times. View in LinkedIn

SPACE-TIME DUALITY. "Time cloaking is possible because of a kind of duality between space and time in electromagnetic theory. In particular, the diffraction of a beam of light in space is mathematically equivalent to the temporal propagation of light through a dispersive medium. In other words, diffraction and dispersion are symmetric in spacetime." https://lnkd.in/eVgKzAT View in LinkedIn

TWO TIME CLOAK METHODS. "The cloaks can either be constructed by synthesizing two linear time-invariant filters with different transfer functions to open and close a temporal gap orderly, so that any events occurring during the gap are not detectable outside, or be designed based upon temporal compensation to make event outside the cloaks not detectable." https://lnkd.in/eJ7ATea View in LinkedIn

FROM INVISIBILITY TO TIME CLOAKS. "Similar to distant spatial cloaks, which can cloak objects at a distance outside the cloaks and be regarded as a conjugated spatial filter, we can also construct a temporal cloak without time window to conceal events." https://lnkd.in/eJ7ATea View in LinkedIn

TRANSFORMATION OPTICS. "No matter whether the cloaks are for cloaking objects or for cloaking events, they are mainly designed based upon the popular transformation optics method." https://lnkd.in/eJ7ATea View in LinkedIn

TIME CLOAKING CLOAKS EVENTS. "Physicists have created a “hole in time” using the temporal equivalent of an invisibility cloak...Today, Moti Fridman and buddies, at Cornell University in Ithaca, go a step further. These guys have designed and built a cloak that hides events in time." https://lnkd.in/eVgKzAT View in LinkedIn