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QI: Fachverband Quanteninformation
QI 3: Quantum Simulation
QI 3.4: Vortrag
Montag, 9. März 2026, 15:45–16:00, BEY/0137
A Parametrically-Driven High-Q Multimode Cavity for Analog Quantum Simulations — •Johannes Schading1, Ian Yang1, Joao C. Pinto Barros2, Thea Budde2, Raquel Garcia-Belles3, Alexander Anferov3, Yiwen Chu3, Marina Marinkovic2, and Alexander Grimm1 — 1Bosonic Quantum Information Group (LNQ/CPS), Paul Scherrer Institute, Switzerland — 2High Performance Computational Physics Group, ETH Zürich, Switzerland — 3Hybrid Quantum Systems Group, ETH Zürich, Switzerland
Analog quantum simulations offer a powerful route to study real-time dynamics in systems such as lattice gauge theories or quantum synchronization of nonlinear oscillators. However, these simulations require interaction strengths to exceed decoherence rates by a large margin. Our approach to address this challenge is to encode the system degrees of freedom in high-Q bosonic modes and activating strong parametric interactions in an all-to-all-connected multimode architecture coupled to a superconducting qubit. By applying a microwave drive, we use a qubit-mediated fourth-order parametric process to realize a three-bosonic-mode interaction with a hopping rate of J/2π > 50 kHz, significantly larger than typical decay rates in high-purity aluminum cavities [1]. Our multimode architecture allows for in-situ connectivity that enables simulations of high-dimensional systems, such as a (2+1)D lattice formulation of the Schwinger model. In this talk, I will discuss our progress towards implementing analog quantum simulations with parametrically-activated bosonic-mode interactions.
[1] Chakram, S. et al. Physical Review Letters 127, 107701 (2021).
Keywords: superconducting circuits; parametric process; analog quantum simulation; high-Q multimode cavity; bosonic qubit