Single-shot readout and relaxation of singlet/triplet states in exchange-coupled ${}^{31}$P electron spins in silicon

Juan P. Dehollain, Juha T. Muhonen, Kuan Y. Tan +4

We present the experimental observation of a large exchange coupling $J\approx 300$ $\mu$eV between two ${}^{31}$P electron spin qubits in silicon. The singlet and triplet states of t…