Harvard Quantum Initiative

A new arXiv paper presents a hybrid workflow that keeps data assimilation and dynamical simulation classical while using a QUBO-to-Ising formulation for quantum-assisted parameter estimation.

A new arXiv hardware paper introduces edge-pass Purcell filters for superconducting-qubit readout, reporting 99.46% to 99.49% average readout fidelity with compact high-pass and low-pass implementations.

A new arXiv theory paper studies how measurement feedback and correlated records shape work statistics in a quantum information engine, including a coherence-transition interference contribution.

A new arXiv paper evaluates quantum-jump descriptions of current fluctuations in non-additive open quantum systems and identifies conditions under which imperfect jump detection recovers Landauer-Büttiker results.

This arXiv preprint proves a local uniqueness result for the Born rule in small categories with complex-weighted morphisms. Under non-negativity, bounded-degree polynomiality, global phase invariance, classical-limit path additivity, and normalization, it derives the probability assignment P(z)=|z|^2 and identifies global coherence under morphism composition as an open extension.

This arXiv preprint studies Bell correlations for a free real quantum scalar field on a noncommutative Moyal plane. The authors show that twist phases in multiparticle statistics can generate entanglement between wave-packet modes and that suitable local measurements can violate the CHSH Bell inequality, providing an operational probe of the noncommutative multiparticle sector.

Princeton Quantum Initiative and Harvard Quantum Initiative are algorithmically grouped through similar technology focus signals for QAtlas ecosystem discovery.

Stanford Q-FARM and Harvard Quantum Initiative are algorithmically grouped through similar technology focus signals for QAtlas ecosystem discovery.

Caltech Institute for Quantum Information and Matter and Harvard Quantum Initiative are algorithmically grouped through similar technology focus signals for QAtlas ecosystem discovery.

MIT Center for Quantum Engineering and Harvard Quantum Initiative are algorithmically grouped through similar technology focus signals for QAtlas ecosystem discovery.

UC Berkeley Center for Quantum Coherent Science and Harvard Quantum Initiative are algorithmically grouped through similar technology focus signals for QAtlas ecosystem discovery.

University of Chicago Chicago Quantum Exchange and Harvard Quantum Initiative are algorithmically grouped through similar technology focus signals for QAtlas ecosystem discovery.