Superconducting qubit with a quantum memory

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The main goal of this project is to realize and investigate a multimode microwave quantum memorycoupled to a fixed-frequency superconducting qubit. There are real-world problems, such asbiochemistry and astrophysics, which require loads of time by using a classical computer. Therefore,superconducting-based quantum computers have been spotlighted due to their capability to solvetime-consuming and extreme problems and events. Even these problems require numerous qubitsto be solved. However, decoherence from the outer environments that affect the relaxation and thedephasing time brings difficulties in scalable quantum computing. And the simple increment in thenumber of superconducting qubits is not a scalable solution due to obstacles such as decoherence.The multimode microwave quantum memory can store the quantum states of the superconductingqubit. A single microwave domain photon inside the multimode microwave quantum memory canstore the quantum state of a superconducting qubit by helping with a microwave cavity resonator.Once the photon stores the qubit states, the superconducting qubit can retrieve this informationwhen necessary. In the multimode setup, the quantum states of the superconducting qubit can bestored in different modes within the quantum memory, which allows the qubit to selectively retrievethe photon and recover its quantum state from quantum memory. This multimode microwavequantum memory will enable scalable quantum computers without necessitating the simplenanofabrication of multiple qubits.