2020/01/31 by Suman Mondal, Tapan Mishra · 9 citations
Computer Science · Physics and Astronomy · #Condensed matter physics #Electron #Fermi gas #Mott insulator #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum algorithm #Quantum and electron transport phenomena #Quantum many-body systems #Quantum mechanics #Quantum oscillations #Quantum walk #Statistical physics #cond-mat.quant-gas #quant-ph
paper · pdf · doi:10.1103/physreva.101.052341
published in Physical Review A 101(5) (American Physical Society) · 5 pages and 4 figures
arxiv created 2020/05/07 · openalex publication_date 2020/05/28 · openalex created_date 2020/06/05 · arxiv updated 2020/06/24 · openalex updated_date 2026/08/05
Quantum walks of interacting particles may display nontrivial features due to the interplay between the statistical nature and the many-body interactions associated with them. We analyze the quantum walk of interacting defects on top of a uniform bosonic Mott insulator at unit filling in a one-dimensional graph. While the quantum walk of a single-particle defect shows trivial features, the case of two particles exhibits the interesting phenomenon of quantum walk reversal as a function of additional on-site three-body attractive interactions. In the absence of a three-body interaction a quantum walk of pairs of particles is obtained, and as the strength of the three-body interaction becomes more and more attractive, independent-particle behavior appears in the quantum walk. Interestingly, further increase in the three-body interaction leads to the reappearance of the quantum walk associated with a pair of particles. This quantum walk reversal phenomenon is studied using the real-space density evolution, Bloch oscillation, and two-particle correlation functions.