Table 1 Performance of ctrl-VQE in computing the ground state energy of the LiH molecule (Li–H R = 1.5 Å). The energy error relative to FCI, the leakage to higher energy states, the total pulse duration, and the overlap with the exact FCI state are shown. The data correspond to the pulse with five time segments from Fig. 8.
From: Gate-free state preparation for fast variational quantum eigensolver simulations
Method | Energy | Error |
|---|---|---|
Hartree-Fock | −7.8633576 | 0.0177 |
ctrl-VQE | −7.8806399 | 0.0004 |
FCI | −7.8810157 | – |
Pulse duration | 40 ns | – |
Leakage | 0.59% | – |
Overlap | 99.38% | – |
