Oxford physicists claim Aharonov's destiny vector may allow signals from the future

"In that respect, it should be noted that in the realization using a video tape and reversing it, we never will observe the perfect signaling device being used to signal: we can only deduce from the statistics that it could be potentially used for that purpose, as Bob’s backward inputs will typically not always be 0. In contrast, in the realization using post-selection we will observe signaling for the device of Theorem 3, but note that in general this will depend on the chosen P(I): the P(O) we obtain may not lead to backwards signaling."

http://xxx.lanl.gov/PS_cache/arxiv/pdf/1108/1108.1988v1.pdf

forwarded by Art Wagner

"Acoustic time-reversal technology is now readily achievable in the laboratory, and the challenge is to perfect its applications in real-life clinical and industrial settings and in underwater applications. In addition to solving practical problems, TRMs are also unique research tools that allow a better understanding of wave propagation in random media and in reverberant cavities. New developments of time-reversal processing such as the DORT method can also solve detection and imaging problems in complex media. Time-reversal techniques may also be extended to types of wave other than sound waves, for example electromagnetic waves."
http://iopscience.iop.org/0266-5611/17/1/201/pdf/0266-5611_17_1_201.pdf

forwarded by Donald Adams via Facebook