Fig. 3: Landscape of the cost function for infinite temperature.
From: Variational preparation of finite-temperature states on a quantum computer
Panels (a) and (c): Landscape cuts obtained in noiseless simulation and in experiment, respectively, when varying control angles γ while keeping α = 0 (the ideal solution value). Panels (b) and (d): Corresponding cuts obtained when varying control angles α while keeping γ = 0 (the ideal solution value). See text for details. These landscape cuts are sampled at 100 points and interpolated using the Python package adaptive41.
