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REPORT ABUSIVE REPLY
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Message Subject
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HOLY FUCK!!! TIME TRAVEL TO THE PAST PROVEN BY SCIENTIST IN AUSTRALIA!!! HISTORIC!!
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Poster Handle
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Anonymous Coward |
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Post Content
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In the case of single-qubit depolarization the initially pure input state becomes mixed. In contrast to the linear case now an important distinction has to be made with respect to the origin of the decoherence. If it results from an interaction with the environment, which is the case considered here, then ρCTC ‘sees’ an improper mixture and adjusts to the mixed density matrix of the input state. If, however, the origin of the mixture is classical fluctuations in the preparation apparatus, then shot-by-shot pure states enter the circuit and the consistency relation holds accordingly shot-by-shot, resulting in a proper mixture at the output. This suggests that in the presence of a CTC it would be possible to identify the origin of the decoherence in an experimental setup.
If that's true it is a monumental discovery.
I'd like to see that setup first though.
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