Disorder-Assisted Assembly of Strongly Correlated Fluids of Light

• Published in: arXiv.org 2022-07
• Main Authors: Saxberg, Brendan, Vrajitoarea, Andrei, Roberts, Gabrielle, Panetta, Margaret G, Simon, Jonathan, Schuster, David I
• Format: Article
• Language: English
• Subjects: Adiabatic flow; Assembly; Circuits; Eigenvectors; Photons; Quantum computing; Quantum entanglement; Reservoir engineering
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.2207.00577

Guiding many-body systems to desired states is a central challenge of modern quantum science, with applications from quantum computation to many-body physics and quantum-enhanced metrology. Approaches to solving this problem include step-by-step assembly, reservoir engineering to irreversibly pump towards a target state, and adiabatic evolution from a known initial state. Here we construct low-entropy quantum fluids of light in a Bose Hubbard circuit by combining particle-by-particle assembly and adiabatic preparation. We inject individual photons into a disordered lattice where the eigenstates are known & localized, then adiabatically remove this disorder, allowing quantum fluctuations to melt the photons into a fluid. Using our plat-form, we first benchmark this lattice melting technique by building and characterizing arbitrary single-particle-in-a-box states, then assemble multi-particle strongly correlated fluids. Inter-site entanglement measurements performed through single-site tomography indicate that the particles in the fluid delocalize, while two-body density correlation measurements demonstrate that they also avoid one another, revealing Friedel oscillations characteristic of a Tonks-Girardeau gas. This work opens new possibilities for preparation of topological and otherwise exotic phases of synthetic matter.