Manuscript Hawk07-B@1 · Hawk07-B.tex · example · b9785538

Example: Readable beacon, unrecoverable code

Potential operational functions › A beacon is weaker than the payload · lines 1041–1049

The qubit isometry

V ∣ i ⟩ = ∣ i ⟩_{R} ∣ i ⟩_{B}

preserves the computational-basis beacon exactly at $R$ , but both marginal channels dephase. Their nonconstant complements exclude exact whole-qubit recovery.

Displayed formulas in this passage

unlabeled · line 1043
$V ∣ i ⟩ = ∣ i ⟩_{R} ∣ i ⟩_{B}$

Nearby in this section

example: Example: High Bell fidelity need not give uniform accuracy
section: A beacon is weaker than the payload