Author

Harald Putterman

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Preprint Oct 2026

Magic Quantum Code Surgery

Non-Clifford operations required for universal quantum computation can be implemented by measuring logical Clifford operators. We present a generalized framework to fault-tolerantly measure transversal Clifford logical operators in quantum low-density parity check (QLDPC) codes. Our protocol takes any QLDPC code and de...

Kathleen Chang, A. Lyons, Yuan-Jie Ren et al. · 0 citations

Preprint Jul 2026

When quantum thermal states look classical

At high temperature, quantum Gibbs states retain several classical features of the maximally mixed state: the absence of entanglement, the absence of magic, analyticity of the partition function, correlation decay, and algorithmic tractability. We prove new and sharp bounds showing that these features persist down to f...

Harald Putterman, Alexander Zlokapa, Jordan Cotler · 3 citations · ⚡1