Engineering a multi-level bath for transmon with three-wave mixing and parametric drives

• URL: http://arxiv.org/abs/2407.21765v1
• Date: Wed, 31 Jul 2024 17:43:09 GMT
• Title: Engineering a multi-level bath for transmon with three-wave mixing and parametric drives
• Authors: Xi Cao, Maria Mucci, Gangqiang Liu, David Pekker, Michael Hatridge,
• Abstract summary: A photonic system with a tunable bath environment provides an extra degree of freedom for quantum simulators. We experimentally create a tunable chemical potential for the qubit mode. Our results provide a useful tool that can be readily integrated with quantum simulators.
• Score: 0.2796197251957245
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: A photonic system with a tunable bath environment provides an extra degree of freedom for quantum simulators. Such a system can be realized by parametrically modulating the coupling between the system and bath. In this letter, by coupling a transmon qubit to a lossy Superconducting Nonlinear Asymmetric Inductive eLement (SNAIL) mode, we experimentally create a tunable chemical potential for the qubit mode. We show that the qubit can be thermalized to equilibrium with different population distributions under different parametric pumping conditions. We further extend our method to the third level of the transmon, showing its practical use beyond the simple two-level case. Our results provide a useful tool that can be readily integrated with quantum simulators that would benefit from a non-trivial photon population distribution.

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