1:30 pm MCP 201

Search for wavelike dark matter with superconducting qubits and quantum circuit.

Recent developments in quantum sensors and quantum computing technology enable the potential of the quantum-enhanced sensing of dark matter (DM). Specifically, a superconducting transmon qubit can be a good quantum sensor for detecting wavelike DM that interacts with electromagnetic fields. In particular, an electric field induced by DM can stimulate the state transition of transmon qubits becoming measurable DM signals. We have shown in recent works [Phys. Rev. Lett. 131 (2023) 21, 211001 and arXiv: 2407.19755] that by using transmon qubits a great sensitivity to hidden photon DM and axion DM can be obtained which is beyond any constraints put by experiments so far. In addition, we also discussed in work [Phys.Rev.Lett. 133 (2024) 2, 021801] that with a quantum circuit realizing quantum entanglement between sensors the DM signal is enhanced to scale quadratically, rather than linearly, with the number of qubits. In this talk, I will elaborate on the theoretical framework of the transmon qubit excitation due to the effect of DM for wavelike DM search, and introduce the quantum circuit for the plausible enhancement mechanism drastically improving the sensitivity of the search.

## Event Type

**Oct**

**9**