Singlet aided infinite resource reduction in the comparison of distant fields
classification
🪐 quant-ph
keywords
aideddistantfieldssingletstatetaskabsolutecomparison
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We present a task which can be faithfully solved with finite resources only when aided by particles prepared in a particular entangled state: the singlet state. The task consists of identifying the mutual parallelity or orthogonality of weak distant magnetic fields whose absolute directions are completely unknown.
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