Circuit Quantum Electrodynamics and Quantum Gates

We propose the implementation of fast resonant gates in circuit quantum electrodynamics for quantum information processing. We show how a suitable utilization of three-level superconducting qubits inside a resonator constitutes a key tool to perform diverse two-qubit resonant gates, improving the operation speed when compared to slower dispersive techniques. To illustrate the benefit of resonant two-qubit gates in circuit quantum electrodynamics, we consider the implementation of a two-dimensional cluster state in an array of $N\ifmmode\times\else\texttimes\fi{}N$ superconducting qubits by using resonant controlled-phase and one-qubit gates, where the generation time grows linearly with $N$ . For $N=3$ , and taking into account decoherence mechanisms, a fidelity over 60% for the generation of this cluster state is obtained.We propose the implementation of fast resonant gates in circuit quantum electrodynamics for quantum information processing. We show how a suitable utilization of three-level superconducting qubits inside a resonator constitutes a key tool to perform diverse two-qubit resonant gates, improving the operation speed when compared to slower dispersive techniques. To illustrate the benefit of resonant two-qubit gates in circuit quantum electrodynamics, we consider the implementation of a two-dimensional cluster state in an array of $N\ifmmode\times\else\texttimes\fi{}N$ superconducting qubits by using resonant controlled-phase and one-qubit gates, where the generation time grows linearly with $N$. For $N=3$, and taking into account decoherence mechanisms, a fidelity over 60% for the generation of this cluster state is obtained.

arXiv:0908.3673Physical Review BJul 20, 201049 citations

Circuit Quantum Electrodynamics

Garay, Linda Bertel

Jan 1, 20250 citations

Quantum Simulations with Circuit Quantum Electrodynamics

Guillermo Romero, E. Solano, Lucas Lamata

arXiv:1606.01755Quantum science and technologyJan 1, 20178 citations

Gate-compatible circuit quantum electrodynamics in a three-dimensional cavity architecture

Zezhou Xia, Jierong Huo, Zonglin Li +14 more

Semiconductor-based superconducting qubits offer a versatile platform for studying hybrid quantum devices in circuit quantum electrodynamics (QED) architecture. Most of these circuit QED experiments utilize coplanar waveguides, where the incorporation of dc gate lines is straightforward. Here, we present a technique for probing gate-tunable hybrid devices using a three-dimensional (3D) microwave cavity. A recess is machined inside the cavity wall for the placement of devices and gate lines. We validate this design using a hybrid device based on an InAs-Al nanowire Josephson junction. The coupling between the device and the cavity is facilitated by a long superconducting strip, the antenna. The Josephson junction and the antenna together form a gatemon qubit. We further demonstrate the gate-tunable cavity shift and two-tone qubit spectroscopy. This technique could be used to probe various quantum devices and materials in a 3D circuit QED architecture that requires dc gate voltages.Semiconductor-based superconducting qubits offer a versatile platform for studying hybrid quantum devices in circuit quantum electrodynamics (QED) architecture. Most of these circuit QED experiments utilize coplanar waveguides, where the incorporation of dc gate lines is straightforward. Here, we present a technique for probing gate-tunable hybrid devices using a three-dimensional (3D) microwave cavity. A recess is machined inside the cavity wall for the placement of devices and gate lines. We validate this design using a hybrid device based on an InAs-Al nanowire Josephson junction. The coupling between the device and the cavity is facilitated by a long superconducting strip, the antenna. The Josephson junction and the antenna together form a gatemon qubit. We further demonstrate the gate-tunable cavity shift and two-tone qubit spectroscopy. This technique could be used to probe various quantum devices and materials in a 3D circuit QED architecture that requires dc gate voltages.

arXiv:2311.07337Physical Review AppliedMar 18, 20248 citations

Hybrid quantum systems with circuit quantum electrodynamics

Aashish A. Clerk, Konrad W. Lehnert, Patrice Bertet +2 more

Nature PhysicsMar 1, 2020455 citations

N

. For

N=3

, and taking into account decoherence mechanisms, a fidelity over 60% for the generation of this cluster state is obtained.