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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
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Disorder-tunable entanglement at infinite temperature
Hang Dong1, Jean-Yves Desaules2, Yu Gao1
1School of Physics, ZJU-Hangzhou Global Scientific and Technological Innovation Center, and Zhejiang Province Key Laboratory of Quantum Technology and Device, Zhejiang University, Hangzhou 310027, China.
Science Advances
|December 22, 2023
Summary
Researchers created non-thermalizing quantum states using a superconducting qubit ladder. These states, defying thermalization, robustly encode quantum information far from equilibrium, offering new avenues for quantum technologies.
Area of Science:
- Quantum physics
- Condensed matter physics
- Quantum information science
Background:
- Emerging quantum technologies offer solutions to complex problems in physics.
- Quantum systems can exhibit unprecedented phenomena and behaviors.
- Understanding non-equilibrium quantum states is crucial for advancing quantum science.
Purpose of the Study:
- To realize and characterize non-thermalizing quantum states in a controllable system.
- To investigate the encoding of quantum information in far-from-equilibrium states.
- To explore the role of non-ergodic behavior in quantum state engineering.
Main Methods:
- Utilized a custom-built superconducting qubit ladder.
- Implemented quench dynamics to probe state fidelity and entanglement entropy.
- Leveraged the "rainbow scar" phenomenon for analytically exact eigenfunction control.
- Employed disorder in couplings to tune quantum correlations and ergodicity breaking.
Main Results:
- Successfully realized non-thermalizing states with complex entanglement structures.
- Demonstrated robust quantum information encoding in these states, even at effective infinite temperature.
- Showcased on-demand tunability of quantum correlations and ergodicity breaking via disorder.
- Identified a method to design many-body states that resist thermalization.
Conclusions:
- Superconducting qubit systems can host exotic non-thermalizing states.
- Rainbow scar physics provides a mechanism for controlling ergodicity breaking.
- Tunable quantum correlations offer a pathway to engineer novel quantum states.
- This work advances the design principles for quantum technologies that operate far from equilibrium.
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