Superconducting grid-bus surface code architecture for hole-spin qubits

Abstract

We present a scalable hybrid architecture for the 2D surface code combining superconducting resonators and hole-spin qubits in nanowires with tunable direct Rashba spin-orbit coupling. The back-bone of this architecture is a square lattice of capacitively coupled coplanar waveguide resonators each of which hosts a nanowire hole-spin qubit. Both the frequency of the qubits and their coupling to the microwave field are tunable by a static electric field applied via the resonator center pin. In the dispersive regime, an entangling two-qubit gate can be realized via a third order process, whereby a virtual photon in one resonator is created by a first qubit, coherently transferred to a neighboring resonator, and absorbed by a second qubit in that resonator. Numerical simulations with state-of-the-art coherence times yield gate fidelities approaching the $99\%$ fault tolerance threshold.

5 pages, 3 figures + supplement

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Cited by in corpus (20)

• A Coherent Spin-Photon Interface in Silicon
• The germanium quantum information route
• Superconductor-semiconductor hybrid cavity quantum electrodynamics
• Ultrafast Hole Spin Qubit with Gate-Tunable Spin-Orbit Switch
• Direct Rashba spin-orbit interaction in Si and Ge nanowires with different growth directions
• Strong coupling between a photon and a hole spin in silicon
• Squeezed hole spin qubits in Ge quantum dots with ultrafast gates at low power
• Single-shot readout of hole spins in Ge
• Hole Spin Qubits in Ge Nanowire Quantum Dots: Interplay of Orbital Magnetic Field, Strain, and Growth Direction
• Quantum Origami: Transversal Gates for Quantum Computation and Measurement of Topological Order
• Hole spin qubits in thin curved quantum wells
• Longitudinal coupling between a Si/SiGe quantum dot and an off-chip TiN resonator
• High-fidelity spin qubit shuttling via large spin-orbit interaction
• Exchange interaction of hole-spin qubits in double quantum dots in highly anisotropic semiconductors
• Topological line in frustrated Toric code models
• Coherent errors in stabilizer codes caused by quasistatic phase damping
• Topological Spin Textures Enabling Quantum Transmission
• Compiling the surface code to crossbar spin qubit architectures
• Flying-cat parity checks for quantum error correction
• Long-distance coupling of spin qubits via topological magnons