Quantum

Geometric heat pumping on a quantum processor

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 08/10/2026, 04:13:25 UTC.

Briefings

A new quantum processor successfully implements geometric heat pumping by using a collision model with two ancilla qubits to simulate thermal reservoirs. Energy measurements during interactions record heat exchange, and reversing the driving contour extracts the pumping contribution. The process matches exact simulations of the collision model without adjustable parameters, approaching the geometric limit of Lindblad dynamics in the slow-driving regime.

Key points

• Geometric heat pumping transfers energy between reservoirs at equal temperature where heat exchange depends only on the driving contour in parameter space.
• The mechanism was implemented on a superconducting quantum processor using a collision model with two ancilla qubits prepared in thermal states.

Context and limitations

The study relies on energy measurements before and after interactions; results are limited to the slow-driving regime and exact simulations of the collision model without adjustable parameters.

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