[9p-M111-1~11] Quantum sensing toward ultimate sensitivity

[9p-M111-3] Spin sensing using superconducting quantum circuits

〇Hiraku Toida¹, Rangga P. Budoyo¹, Yuichiro Matsuzaki¹, Kosuke Kakuyanagi¹, William J. Munro¹, Hiroshi Yamaguchi¹, Shiro Saito¹ (1.NTT BRL)

Keywords:superconductor, quantum circuit, spin

We develop spin sensing devices using superconducting quantum circuits. Typical sensing devices are superconducting flux qubits. By detecting penetrating flux through the loop structures of these devices, we detect the signal from the spin systems. We achieve the spin sensitivity of 400 spins/Hz^1/2 and the detection volume of 0.05 pico-liters with a superconducting flux qubit. We will discribe the detailed methods for spin sensing using superconducting circuts in the talk. We will also discuss the sensitivity and the sensing volume followed by perspectives.