1. Build giant ribbon wires made of thousands of small wires, each with a thin coating of a high-temperature superconductor.
2. Send thousands of these ribbon wires to mars and connect them in a ring around the equator.
3. On one of the linkages, connect the conductors 1 off so there is one free conductor on each side, creating a superconducting spiral around the planet.
4. Connect a DC generator to these 2 free conductors
5. Continuously spin the generator using various sources of electricity, over time it should build up a magnetic field in the planet's iron core until it is enough to sustain an atmosphere.
The ribbon wires would need heat sinks to come out at night and mirrors to cover them at day in order to remain below the critical temp.
Does anyone else think this would work? (I'm not saying its feasible now but possibly in a few thousand years)