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Qubit reset with a shortcut-to-isothermal scheme
Hong-Bo Huang1, Geng Li1,2, Hui Dong1
1Graduate School of <a href="https://ror.org/039vqpp67">China Academy of Engineering Physics</a>, No. 10 Xibeiwang East Road, Haidian District, Beijing 100193, China.
Physical Review. E
|July 18, 2024
Summary
Resetting quantum bits (qubits) efficiently in finite time is challenging. This study introduces a shortcut-to-isothermal scheme to minimize energy costs for finite-time qubit reset, offering a practical reference for quantum information processing.
Area of Science:
- Quantum Information Science
- Thermodynamics
- Quantum Computing
Background:
- Landauer's principle defines the minimum energy cost for classical bit reset (kBTln2) over infinite time.
- Resetting quantum bits (qubits) in finite time presents unique challenges due to operational time and controllability limits.
Purpose of the Study:
- To design an efficient scheme for resetting a qubit in finite time.
- To minimize the energy cost associated with finite-time qubit reset under limited controllability.
Main Methods:
- Development of a shortcut-to-isothermal control scheme.
- Optimization of control strategies to minimize energy consumption.
- Analysis of control schemes with and without bounds.
Main Results:
- The proposed shortcut-to-isothermal scheme enables finite-time qubit reset.
- An optimal control strategy was identified to minimize energy cost.
- The scheme provides a reference for energy-efficient qubit reset.
Conclusions:
- Finite-time qubit reset is achievable with optimized control.
- The shortcut-to-isothermal approach offers a pathway to minimize energy expenditure in quantum systems.
- This work provides valuable insights for practical quantum information processing and qubit manipulation.
