Regensburg 2025 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 55: Superconducting Electronics: SQUIDs, Qubits, Circuit QED III
TT 55.12: Talk
Friday, March 21, 2025, 12:30–12:45, H36
Two-qubit entangling quantum gates in a 2D ring resonator architecture — •Anirban Bhattacharjee1,2, Panya Jain1, Jay Deshmukh1, Srijita Das1, Madhavi Chand1, Meghan Patankar1, and Rajamani Vijayaraghavan1 — 1Tata Institute of Fundamental Research, Mumbai, India — 2Walther Meissner Institute, Garching b Muenchen, Germany
A novel ring resonator [1] design allows interqubit connectivity beyond nearest neighbours, which has always been a topological constraint in present state-of-art quantum architectures. In this work, we demonstrate connectivity between three fixed-frequency transmon qubits coupled to a ring resonator in a planar 2D architecture. We have also demonstrated two-qubit entangling gates between two fixed-frequency qubits in this geometry. Our results show the ability to demonstrate quantum entanglement using the ring resonator and opens up the possibility of exploring various gate implementations in this architecture. [1] Phys. Rev. Appl. 16, 024018 (2021).
Keywords: Superconducting qubits; Quantum computation; Quantum gates; Circuit QED; Quantum entanglement