2016/05/31 by Wojciech Kozlowski, Santiago F. Caballero-Benitez, Igor B. Mekhov · 7 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Coupling (piping) #Dissipative system #Hamiltonian (control theory) #Quantum #Quantum Mechanics and Applications #Quantum many-body systems #Quantum measurement #Quantum phases #Quantum state #Quantum system #Weak measurement #cond-mat.quant-gas #physics.optics #quant-ph
paper · pdf · doi:10.1038/srep42597
published in Scientific Reports 7(1), 42597 (Nature Portfolio) · To be published in Scientific Reports; 9 pages, 4 figures (incl. appendices)
openalex created_date 2016/06/24 · arxiv created 2017/01/29 · openalex publication_date 2017/02/22 · arxiv updated 2017/02/27 · openalex updated_date 2026/08/05
A many-body atomic system coupled to quantized light is subject to weak measurement. Instead of coupling light to the on-site density, we consider the quantum backaction due to the measurement of matter-phase-related variables such as global phase coherence. We show how this unconventional approach opens up new opportunities to affect system evolution. We demonstrate how this can lead to a new class of final states different from those possible with dissipative state preparation or conventional projective measurements. These states are characterised by a combination of Hamiltonian and measurement properties thus extending the measurement postulate for the case of strong competition with the system's own evolution.