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Updated: Jan 7, 2026
06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
9.6K
Quantum walk with coherent multiple translations induces fast quantum gate operations
Yixiang Zhang1, Xin Qiao2,3, Luojia Wang1
1State Key Laboratory of Photonics and Communications, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, 200240, China.
Light, Science & Applications
|December 31, 2025
Summary
This study introduces a modulated ring for quantum walks, enabling fast quantum gate operations. It demonstrates efficient single-qubit and two-qubit gates using a coherent multiple path quantum walk, advancing quantum algorithms.
Area of Science:
- Quantum information science
- Condensed matter physics
- Photonic quantum technologies
Background:
- Quantum walks are crucial for quantum algorithms, with speed-up achievable via long-range couplings.
- One-dimensional translational symmetry is a key feature in quantum walk studies.
Purpose of the Study:
- To investigate a modulated ring system for discrete-time quantum walks.
- To explore the potential for fast quantum gate operations within this system.
Main Methods:
- Implementing a discrete-time quantum walk on a modulated ring under strong resonant modulation.
- Utilizing a synthetic frequency dimension for coherent multiple long-range translations.
- Analyzing walker evolution under a topological band.
Main Results:
- Achieved coherent multiple long-range translations in a quantum walk.
- Demonstrated arbitrary single-qubit state preparation in quasi-momentum space.
- Showcased a CNOT two-qubit gate operation in a single time step.
Conclusions:
- The modulated ring enables fast quantum gate operations through a coherent multiple path quantum walk.
- This approach offers efficient quantum operations, potentially impacting photonic quantum computing designs.
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