Fig. 6: Hubbard chains with various methods. | npj Quantum Information

Fig. 6: Hubbard chains with various methods.

From: Quantum Zeno Monte Carlo for computing observables

Fig. 6

Ground energy estimation errors are shown for: a–c U/t = 4, 4 sites; d–f U/t = 10, 4 sites; and (g–i) U/t = 10, 8 sites. The figures plot the energy estimation error ϵ as a function of (a, d, g) the maximum time evolution length, b, e, h the total number of Trotter steps, and (c, f, i) the total number of samples. In all panels, blue points represent results from the method of Lin and Tong14, black points represent results from QCELS15, and red points represent results from QZMC.

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