IAP Seminar Series
Name of the speaker: Mr. Samarth Hawaldar
Date/Time: 11th December 2025/3:30 PM
Venue: SV Narasaiah Auditorium, IAP Department.
Title: Progress toward entangling superconducting qubits with room temperature optical photons
Abstract: Quantum transducers provide a pathway to link superconducting circuits to quantum networks that extend over large distances at ambient temperatures. Here, we present our progress toward entangling a superconducting qubit in a dilution refrigerator with a time-bin encoded optical qubit propagating through a room temperature telecom fiber. Starting from a transmon qubit coupled to a microwave resonator, we generate an itinerant time-bin encoded microwave qubit entangled with the transmon. We then route the microwave photon to an electro-optic transducer that upconverts it to the optical domain. To verify the entanglement fidelity, we plan to perform simultaneous measurements of the superconducting qubit and the optical qubit states, and show evidence of correlations in both longitudinal and transversal bases.
In this talk, I will present current experimental results, and discuss solutions for some of the problems faced. Our findings highlight the feasibility of using electro-optic conversion to interface superconducting qubits with photonic channels for quantum networking. If time permits, I will also talk about some other projects worked on by the group in the fields of quantum computation, with a focus on using fluxonia as low-hardware-overhead erasure qubits.
Speaker Bio: Mr. Samarth Hawaldar is currently pursuing graduate studies in Institute of Science and Technology (IST), Klosterneuberg, Austria, working under the supervision of Prof. J M Fink. Samarth is working on quantum computation and quantum networks primarily and interested in experimental and theoretical aspects of quantum information processing. Before moving to Austria, Samarth did his BS and MS in IISc Bengaluru, working under the supervision of Prof. Baladitya Suri (IAP).