[14a-K103-1~8] KS.2 Quantum Information Engineering Group

9:15 AM - 9:30 AM JST(12:15 AM - 12:30 AM UTC)

[14a-K103-2] High-accuracy quantum chemical calculation of spin qubits using a trapped-ion quantum computer

〇Hirofumi Nishi^1,2, Taichi Kosugi^1,2, Yu-ichiro Matsushita^2,1,3 (1.Quemix, 2.UTokyo, 3.QST)

Keywords:

Quantum algorithm,Quantum chemistry

Quantum sensing has garnered significant attention due to its high spatial resolution and wide dynamic range, with nitrogen-vacancy (NV) centers in diamond and complex defects in wurtzite aluminum nitride (w-AlN) being investigated as promising candidates for spin quantum bits. In this study, low-energy effective Hamiltonians were constructed for these systems, and the probabilistic imaginary time evolution (PITE) method was employed on a quantum computer to determine their ground and excited states. Given the susceptibility of current quantum computers to quantum noise, the [[n+2, n, 2]] quantum error detection (QED) code was implemented to mitigate noise effects. Consequently, the spin singlet state was reproduced with 98% classical fidelity when compared to the exact solution.