Optimal probes for noise estimation in vector encoding channels show a descending staircase of entanglement with rising noise strength, with fully product states becoming optimal at high noise.
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Midpoint source placement optimizes entanglement distribution over noisy qubit channels, with SDP showing weakly entangled inputs maximize negativity for amplitude damping and depolarizing noise.
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Optimal quantum precision in noise estimation: Is entanglement necessary?
Optimal probes for noise estimation in vector encoding channels show a descending staircase of entanglement with rising noise strength, with fully product states becoming optimal at high noise.
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Optimizing entanglement distribution via noisy quantum channels
Midpoint source placement optimizes entanglement distribution over noisy qubit channels, with SDP showing weakly entangled inputs maximize negativity for amplitude damping and depolarizing noise.