Programmable Dissipation via Partial Quantum Error Correction

• URL: http://arxiv.org/abs/2605.30217v1
• Date: Thu, 28 May 2026 16:49:07 GMT
• Title: Programmable Dissipation via Partial Quantum Error Correction
• Abstract summary: We show that logical noise can instead be turned into a calibrated resource.<n>One fault-tolerant round induces a logical completely positive trace-preserving map.<n>We derive an accuracy criterion for multi-step simulation in which the code distance is chosen.
• Score: 2.614894682819833
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Noise is typically treated as the adversary of quantum information processing. For open quantum dynamics, however, dissipation is part of the target physics, creating a tension with fault-tolerant architectures designed to suppress decoherence. Here we show that logical noise can instead be turned into a calibrated resource. We treat the error-correction cycle as a programmable primitive: one fault-tolerant round induces a logical completely positive trace-preserving map, and decoder/recovery randomization generates a controllable family of logical channels whose convex mixtures realize Kraus-channel mixing. This enables direct compilation of target dissipators into effective logical dynamics without explicit ancilla qubits for encoding the bath degree of freedoms. We derive an accuracy criterion for multi-step simulation in which the code distance is chosen so that uncontrolled logical errors remain a small fraction of the intended dissipation per step, rather than being driven below an arbitrarily small closed-system tolerance. Partial quantum error correction thus repurposes fault-tolerant structure to sculpt dissipation, offering a resource-efficient route to quantum simulation of open quantum systems.

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