Weyl dynamical maps are fully classified via phase-space subgroups; convex mixing of eternally non-Markovian dephasing maps yields Markovian semigroups, and irreducible eternally non-Markovian examples exist for qutrits.
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The [[144,12,12]] bivariate bicycle code is distributed across 4 to 12 processors in a star network, with simulations showing logical error rates under varying nonlocal noise scaling.
Absence of coherent superpositions in the coherent-state basis is a sufficient condition for Wigner function positivity, necessary and sufficient for cat states and limiting cases of higher-order cat states.
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Convexity and non-Markovianity of Weyl Maps
Weyl dynamical maps are fully classified via phase-space subgroups; convex mixing of eternally non-Markovian dephasing maps yields Markovian semigroups, and irreducible eternally non-Markovian examples exist for qutrits.
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Distributed Quantum Error Correction with Bivariate Bicycle Codes in a Modular Architecture
The [[144,12,12]] bivariate bicycle code is distributed across 4 to 12 processors in a star network, with simulations showing logical error rates under varying nonlocal noise scaling.
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Operational criterion for Wigner function negativity
Absence of coherent superpositions in the coherent-state basis is a sufficient condition for Wigner function positivity, necessary and sufficient for cat states and limiting cases of higher-order cat states.