Seminar by Dr. Arnob Kumar Ghosh
Title: Quasicrystal pump for end-to-end state transfer
Speaker: Dr. Arnob Kumar Ghosh, Uppsala University, Sweden
Abstract: In this talk, I will discuss how a one-dimensional quasicrystalline chain based on the Fibonacci quasicrystal [1] can be employed to transfer a localized state between the ends of the chain by only minimal manipulation [2]. Then, by coupling two external qubits at the ends of the Fibonacci chain, I will demonstrate the system's highly adaptable functionality as a quantum bus, with both on-demand switching of qubit states and the generation of maximally entangled Bell states between the qubits. Finally, I will discuss our recent experimental implementation of this Fibonacci chain setup in a photonic waveguide array, demonstrating light pumping [3].
References:
[1] A. Jagannathan, Rev. Mod. Phys. 93, 045001 (2021).
[2] AKG, R. Seoane Souto, V. Azimi-Mousolou, A. M. Black-Schaffer*, and P. Holmvall*, Phys. Rev. B 112, 205427 (2025).
[3] AKG*, A. Chen*, A. El Hassan, P. Holmvall, M. Bourennane, and A. M. Black-Schaffer, Phys. Rev. Research 8, 033347 (2026).
Venue: Seminar Room (202), Physics Department IIT Bombay, Powai, Mumbai