A simultaneous feedback and feed-forward control and its application to realize a random walk on the Bloch sphere in a superconducting Xmon-qubit system
arXiv:1909.10022 · doi:10.1103/PhysRevApplied.14.014099
Abstract
Measurement-based feedback control is central in quantum computing and precise quantum control. Here we realize a fast and flexible field-programmable-gate-array-based feedback control in a superconducting Xmon qubit system. The latency of room-temperature electronics is custom optimized to be as short as 140 ns. Projective measurement of a signal qubit produces a feedback tag to actuate a conditional pulse gate to the qubit. In a feed-forward process, the measurement-based feedback tag is brought to a different target qubit for a conditional control. In a two-qubit experiment, the feedback and feed-forward controls are simultaneously actuated in consecutive steps. A quantum number is then generated by the signal qubit, and a random walk of the target qubit is correspondingly triggered and realized on the Bloch sphere. Our experiment provides a conceptually simple and intuitive benchmark for the feedback control in a multi-qubit system. The feedback system can be further scaled up for more complex feedback control experiments.
References in corpus (36)
- Supplementary information for "Quantum supremacy using a programmable superconducting processor"
- Charge insensitive qubit design derived from the Cooper pair box
- A Quantum Engineer's Guide to Superconducting Qubits
- Logic gates at the surface code threshold: Superconducting qubits poised for fault-tolerant quantum computing
- State preservation by repetitive error detection in a superconducting quantum circuit
- Coherent Josephson qubit suitable for scalable quantum integrated circuits
- Building logical qubits in a superconducting quantum computing system
- Quantum feedback control of a superconducting qubit: Persistent Rabi oscillations
- AC-Stark Shift and Dephasing of a Superconducting Qubit Strongly Coupled to a Cavity Field
- Fast Scalable State Measurement with Superconducting Qubits
- Stabilizing entanglement autonomously between two superconducting qubits
- Deterministic entanglement of superconducting qubits by parity measurement and feedback
- Realization of Deterministic Quantum Teleportation with Solid State Qubits
- Single-shot qubit readout in circuit Quantum Electrodynamics
- Single-shot qubit readout in circuit Quantum Electrodynamics
- Demonstration of quantum error correction and universal gate set on a binomial bosonic logical qubit
- Fast Reset and Suppressing Spontaneous Emission of a Superconducting Qubit
- Demonstrating a Driven Reset Protocol of a Superconducting Qubit
- State tomography of capacitively shunted phase qubits with high fidelity
- Feedback control of a solid-state qubit using high-fidelity projective measurement
- Broadband parametric amplification with impedance engineering: Beyond the gain-bandwidth product
- Information-to-work conversion by Maxwell's demon in a superconducting circuit-QED system
- Repeated multi-qubit readout and feedback with a mixed-species trapped-ion register
- Characterization and Reduction of Capacitive Loss Induced by Sub-Micron Josephson Junction Fabrication in Superconducting Qubits
- Persistent control of a superconducting qubit by stroboscopic measurement feedback
- Entanglement Stabilization using Parity Detection and Real-Time Feedback in Superconducting Circuits
- Multiplexed dispersive readout of superconducting phase qubits
- Reversing quantum trajectories with analog feedback
- Hardware for Dynamic Quantum Computing
- The experimental realization of high-fidelity `shortcut-to-adiabaticity' quantum gates in a superconducting Xmon qubit
- Comparing and combining measurement-based and driven-dissipative entanglement stabilization
- Coherent versus measurement feedback: Linear systems theory for quantum information
- Low-Latency Digital Signal Processing for Feedback and Feedforward in Quantum Computing and Communication
- High fidelity measurement and quantum feedback control in circuit QED
- Experimental realization of a fast controlled-Z gate via a shortcut-to-adiabaticity
- Experimental demonstration of work fluctuations along a shortcut to adiabaticity with a superconducting Xmon qubit
Cited by in corpus (6)
- Optimization of Controlled-Z Gate with Data-Driven Gradient Ascent Pulse Engineering in a Superconducting Qubit System
- Improving Quantum Simulation Efficiency of Final State Radiation with Dynamic Quantum Circuits
- Determination of Molecular Energies via Quantum Imaginary Time Evolution in a Superconducting Qubit System
- Geometric correspondence of noisy quantum dynamics and universal robust quantum gates
- Experimental Determination of Electronic States via Digitized Shortcut-to-Adiabaticity and Sequential Digitized Adiabaticity
- Distributed-HISQ: A Distributed Quantum Control Architecture