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Published on: August 2, 2019
Transferring arbitrary d-dimensional quantum states of a superconducting transmon qudit in circuit QED
Tong Liu1, Qi-Ping Su1, Jin-Hu Yang1
1Department of Physics, Hangzhou Normal University, Hangzhou, Zhejiang, 310036, China.
Abstract:
A qudit (d-level quantum system) has a large Hilbert space and thus can be used to achieve many quantum information and communication tasks. Here, we propose a method to transfer arbitrary d-dimensional quantum states (known or unknown) between two superconducting transmon qudits coupled to a single cavity. The state transfer can be performed by employing resonant interactions only. In addition, quantum states can be deterministically transferred without measurement. Numerical simulations show that high-fidelity transfer of quantum states between two superconducting transmon qudits (d ≤ 5) is feasible with current circuit QED technology. This proposal is quite general and can be applied to accomplish the same task with natural or artificial atoms of a ladder-type level structure coupled to a cavity or resonator.
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