The present invention concerns a method of emulating gradient flow for solving a given problem as a charge distribution in a device (1) comprising: first type charge carrier regions (5) interfacing a second type charge carrier region (11) thereby forming charge-flow barriers (20); separating regions (7) for separating the first type charge carrier regions (5) from each other; input terminals (17) connected to the first type charge carrier regions (5); and one or more output terminals (19) connected to the second type charge carrier region (11), and for measuring output signals, and for receiving biasing signals to bias the charge-flow barriers (20) during a measurement phase.