Quote:
sourceCurrently scientists can only send photons carrying quantum information over the length of a single optical fibre; they can't transfer the photons into a different pipe, which is a process known as routing. Normally, that process—including the way it's done in your home router—requires reading data from within the transmission, known as a control signal, which determines where the information can be sent.
The trouble is, reading a control signal in the quantum world actually destroys it—making it impossible to route using data embedded within the signal. In turn, that means using non-quantum control signals, which means losing out on many of the benefits of using quantum information in the first place.
The new device, offered up by Tsinghau University in China, creates a quantum photon, that is a superposition of two separate photons that are in horizontal and vertical polarized states. That quantum photon is then converted into two, lower power, photons, which both also share the same dual polarization. Then, a router can read data from one photon, which it destroys, and use the remaining one as the data signal.
The trouble is, reading a control signal in the quantum world actually destroys it—making it impossible to route using data embedded within the signal. In turn, that means using non-quantum control signals, which means losing out on many of the benefits of using quantum information in the first place.
The new device, offered up by Tsinghau University in China, creates a quantum photon, that is a superposition of two separate photons that are in horizontal and vertical polarized states. That quantum photon is then converted into two, lower power, photons, which both also share the same dual polarization. Then, a router can read data from one photon, which it destroys, and use the remaining one as the data signal.
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Epic Rig
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Epic Rig
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