Quantum / CONCEPT
The optimal negativity of a non-selective two-qubit measurement
For every pure two-qubit state, the largest negativity after a non-selective projective measurement is half its initial negativity plus one quarter.
Closed
DIRECT PREREQUISITES3
DIRECT CONSEQUENCES0
PROOF DEPTH19
DOCUMENT LINKS0
The sharp bound and an attaining measurement
RELATIONSHIP ATLAS
Every connection, in context.
Direct recorded relationships
Proof dependencyStructural affinityDocument link
Certified topology / UPSTREAM
Prerequisites
Certified topology / DOWNSTREAM
Consequences
None recorded in this release.
RELATED KNOWLEDGE
Structural connections
- Collective dephasing can preserve negativity while changing the statestructural-affinity · Closed
- Four-path weighted equality remainderstructural-affinity · Closed
- Hilbert-Schmidt square-root error controls trace errorstructural-affinity · Closed
- Negativity does not imply positive reductionstructural-affinity · Closed
- Qutrit APPT attaining statesstructural-affinity · Closed
- Schmidt-number bounds for incomplete equiangular measurementsstructural-affinity · Closed
- Schmidt-number bounds for incomplete mutually unbiased basesstructural-affinity · Closed
- Separable states outside every local-unitary stabilizer framestructural-affinity · Closed
- SIC–MUB correlation trace-norm equalitystructural-affinity · Closed
Documents & exposition
None recorded in this release.
Other authored & advisory relationships
None recorded in this release.
LIBRARY / RELEASE VERSIONS
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