Rapid on-demand generation of thermal states in superconducting quantum circuits
Year: 2025
Type: article
Abstract: We experimentally demonstrate the fast generation of thermal states of a transmon using a single-junction quantum-circuit refrigerator (QCR) as an tunable environment. Through single-shot readout, we monitor the transmon up to its third excited state, assessing population distributions controlled by QCR drive pulses. Whereas cooling can be achieved in the weak-drive regime, high-amplitude pulses can generate Boltzmann-distributed populations from a temperature of 110 mK up to 500 mK within 100 ns. As we propose in our work, this fast and efficient temperature control provides an appealing opportunity to demonstrate a quantum heat engine. Our results also pave the way for efficient dissipative state preparation and for reducing the circuit depth in thermally assisted quantum algorithms and quantum annealing.
Source: Physical Review Research
DOI: 10.1103/6bty-836h
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,625
Awards: Finnish Centre of Excellence in Quantum Technology, Empowering quantum nanoelectronic devices using thermal energy, New superconducting quantum-electric device concept utilizing increased anharmonicity, simple structure, and insensitivity to charge and flux noise, Many-body localization and dissipation in arrays of superconducting transmon devices, Finnish Centre of Excellence in Quantum Technology, G8752686602
OpenAlex ID: W4414912736