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Few-qubit quantum refrigerator for cooling a multi-qubit system
Onat Arısoy1, Özgür E Müstecaplıoğlu2
1Institute for Physical Science and Technology, University of Maryland, College Park, MD, 20742, USA.
Scientific Reports
|June 22, 2021
Summary
We developed a compact quantum refrigerator using a few-qubit system to cool larger systems. This quantum cooling method offers efficient thermalization for quantum technologies.
Area of Science:
- Quantum physics
- Quantum thermodynamics
- Condensed matter physics
Background:
- Quantum systems require precise temperature control for optimal performance.
- Miniaturization of cooling systems is crucial for scalable quantum technologies.
Purpose of the Study:
- To propose and analyze a compact quantum refrigerator based on a few-qubit system.
- To investigate the cooling potential of a spin-star model for multi-qubit systems.
Main Methods:
- Utilizing a central qubit coupled to N ancilla qubits (spin-star model) as a refrigerant.
- Simulating interactions of the longitudinal and ferromagnetic Ising model form.
- Analyzing a quantum refrigeration cycle considering operational costs and efficiency.
Main Results:
- Demonstrated that the central qubit can achieve temperatures colder than the environment.
- Established bounds on the achievable cooling temperatures.
- Showcased a collisional route to thermalization for cooling many-qubit systems.
Conclusions:
- Few-qubit quantum refrigerators offer a scalable solution for cooling in quantum applications.
- The proposed system can be integrated into existing all-qubit architectures.
- This technology can enhance the speed and power of quantum computing and thermal devices.
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