quantum-memory

Library for Q# implementing various qRAM proposals

This Repo is a collection of Python scripts designed to programmatically render physics animations. This project utilizes the Manim Community library to accurately simulate and visualize time-dependent quantum storage protocols.

线性耦合传播的因果数值求解：marcher、GEM专用IF2及XMDS2接口；含中文推导与可复现验证。

Basic results of our quantum repetition code study.

Python model of a multi-node quantum repeater chain with memory decoherence, parameter sweeps, and tests. Model output under stated assumptions, not measured hardware.

Whole-frontier rigidity of iid pure quantum records under sublinear homomorphism syndrome advice, with binary bounds and phase-channel consequences.

Learning hidden Pauli measurements from quantum examples with noisy labels: optimal sample bounds, quantum-memory advantage, and conditional hardness under quantum decision-LPN.

Passive quantum-memory lifetime and calibration-information bounds under common-field dephasing with uncertain spatial couplings.

Exact certificates and matching constructions for a sharp, dimension-independent qubit-recovery bound from a three-branch coherent test of an addressed subsystem, with a quantum bypass available to the decoder.

Trabalhos realizados na disciplina de Sistemas Digitais

Root-fidelity estimation under complete quantum resets, with adaptive converses and a loop-phase application.

Boundary erasure in a coherent no-passing quantum chain: exponential memory under unital endpoint control, polynomial erasure by draining and refilling, and a sharp reservoir filling threshold.

Sharp limits on transferring unknown quantum states from a collectively emitting ensemble to a passive single-mode memory. Includes proofs, a guided tutorial and reproducible checks showing why near-complete photon collection need not imply faithful state transfer.

Physical symmetry-memory laws and finite-deformation erasure limits.

A theoretical hardware architecture framework for the post-silicon era based on on radiation-evacuated lithium niobate on sapphire (LNOS)

Simulation study: how much fidelity does a spin quantum memory lose when its release time (network herald) is random, and does a herald-triggered closing pulse or a learned pulse schedule beat tuned CPMG? Exact Gaussian dephasing model, 5 seeds, PyTorch.

Quantum memory costs for delayed local X/Z measurements: exact finite-size tradeoffs, one-qubit memory allocation, and a collective advantage for unequal accuracies, with proofs and reproducible certificates.

Noise-aware co-design of quantum frequency conversion (target wavelength, pump power) and bandwidth matching for heralded entanglement between heterogeneous quantum memories over 10-100 km fibre. Differentiable PyTorch link model, Fock-space validation, seeds and stats.

Logarithmic quantum-memory bounds for deterministic catalytic magic-state distillation, with exact marginal return, fixed noisy-input budgets, and a matching CCZ construction.

Une implémentation de référence et analyse rigoureuse des Cristaux de Temps Discrets (DTC), focalisée sur la physique de Floquet, la localisation MBL et la protection des états quantiques (Cat Scars)