2019/03/31 by Iñaki García-Elcano, Alejandro González-Tudela, Jorge Bravo-Abad +1 · 1 citation
Computer Science · Physics and Astronomy · #Bound state #Coherence (philosophical gambling strategy) #Coherent states #Dissipation #Photonics #Physics #Quantum #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum dot #Quantum entanglement #Quantum information #Quantum mechanics #Quantum optics #Robustness (evolution) #Scaling #Statistical physics #Topological Materials and Phenomena #Topology (electrical circuits) #Upper and lower bounds #Wave function #cond-mat.mtrl-sci #physics.optics #quant-ph
paper · pdf · doi:10.1103/physrevlett.125.163602
published as Phys. Rev. Lett. 125, 163602 (2020)
openalex publication_date 2020/10/14 · arxiv created 2020/12/23 · arxiv updated 2020/12/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Long-range coherent interactions between quantum emitters are instrumental for quantum information and simulation technologies, but they are generally difficult to isolate from dissipation. Here, we show how such interactions can be obtained in photonic Weyl environments due to the emergence of an exotic bound state whose wave function displays power-law spatial confinement. Using an exact formalism, we show how this bound state can mediate coherent transfer of excitations between emitters, with virtually no dissipation and with a transfer rate that follows the same scaling with distance as the bound state wave function. In addition, we show that the topological nature of Weyl points translates into two important features of the Weyl bound state, and, consequently, of the interactions it mediates: first, its range can be tuned without losing the power-law confinement, and, second, they are robust under energy disorder of the bath. To our knowledge, this is the first proposal of a photonic setup that combines simultaneously coherence, tunability, long range, and robustness to disorder. These findings could ultimately pave the way for the design of more robust long-distance entanglement protocols or quantum simulation implementations for studying long-range interacting systems.