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Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
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Engineering entangled microwave photon states through multiphoton interactions between two cavity fields and a
Yan-Jun Zhao1, Changqing Wang1, Xiaobo Zhu2
1Institute of Microelectronics, Tsinghua University, Beijing, 100084, China.
Scientific Reports
|April 2, 2016
Summary
Researchers developed a universal algorithm using multiphoton processes to create entangled microwave photon states in superconducting circuits. This method efficiently generates arbitrary superpositions, including NOON states, in the strong coupling regime.
Area of Science:
- Quantum computing
- Superconducting circuits
- Quantum optics
Background:
- Superconducting qubits exhibit couplings with microwave fields, including longitudinal interactions.
- Broken inversion symmetry in superconducting qubits is crucial for these interactions.
Purpose of the Study:
- To design a universal algorithm for generating arbitrary superpositions of two-mode microwave photon states.
- To efficiently produce entangled microwave photon states in the strong and ultrastrong coupling regimes.
Main Methods:
- Utilizing multiphoton processes driven by longitudinal coupling fields.
- Employing frequency matching conditions for precise state generation.
- Coupling two separated transmission line resonators to a superconducting qubit.
Main Results:
- Demonstrated an efficient algorithm for creating arbitrary superpositions of two-mode photon states.
- Successfully analyzed the generation of evenly-populated states and NOON states.
- Achieved efficient entangled microwave photon state production in the strong/ultrastrong coupling regime.
Conclusions:
- The proposed multiphoton approach offers an efficient route to generate complex entangled microwave states.
- This method surpasses single-photon processes in the strong and ultrastrong qubit-microwave field interaction regimes.
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