Quantum state transfer and controlled-phase gate on one-dimensional superconducting resonators assisted by a quantum...

Area of Science:

• Quantum Information Science
• Superconducting Circuits
• Quantum Computing

Background:

• Scalable quantum computation requires efficient methods for manipulating quantum information, particularly in microwave photon systems.
• Existing quantum processors face challenges in achieving long-range entanglement and controlled operations between distant qubits.

Purpose of the Study:

• To propose a novel quantum processor architecture for scalable quantum computation using microwave photons.
• To demonstrate high-fidelity quantum state transfer and controlled-phase gate operations between distant superconducting resonators.

Main Methods:

• Utilizing a common resonator as a quantum bus coupled to distant resonators via superconducting quantum interferometer devices (SQUIDs).
• Employing a transmon qutrit for coupling to the central resonator, with tunable coupling strengths.
• Implementing techniques for catching and releasing microwave photons to facilitate quantum operations.

Main Results:

• Demonstration of a quantum processor architecture enabling tunable coupling between distant superconducting resonators.
• Presentation of schemes for high-fidelity quantum state transfer and controlled-phase gates between these resonators.
• The processor architecture is designed for scalable quantum computation on microwave photons.

Conclusions:

• The proposed quantum processor offers a promising platform for scalable quantum computation with microwave photons.
• The demonstrated high-fidelity operations are crucial for advancing quantum communication and networking.
• This architecture may significantly contribute to the development of distributed quantum systems.