Exploiting dynamic quantum circuits in a quantum algorithm with superconducting qubits
arXiv:2102.01682 · doi:10.1103/PhysRevLett.127.100501
Abstract
The execution of quantum circuits on real systems has largely been limited to those which are simply time-ordered sequences of unitary operations followed by a projective measurement. As hardware platforms for quantum computing continue to mature in size and capability, it is imperative to enable quantum circuits beyond their conventional construction. Here we break into the realm of dynamic quantum circuits on a superconducting-based quantum system. Dynamic quantum circuits involve not only the evolution of the quantum state throughout the computation, but also periodic measurements of a subset of qubits mid-circuit and concurrent processing of the resulting classical information within timescales shorter than the execution times of the circuits. Using noisy quantum hardware, we explore one of the most fundamental quantum algorithms, quantum phase estimation, in its adaptive version, which exploits dynamic circuits, and compare the results to a non-adaptive implementation of the same algorithm. We demonstrate that the version of real-time quantum computing with dynamic circuits can offer a substantial and tangible advantage when noise and latency are sufficiently low in the system, opening the door to a new realm of available algorithms on real quantum systems.
arXiv comment7 pages, 4 figures, plus supplement
References in corpus (55)
- Charge insensitive qubit design derived from the Cooper pair box
- Hardware-efficient Variational Quantum Eigensolver for Small Molecules and Quantum Magnets
- Cavity quantum electrodynamics for superconducting electrical circuits: an architecture for quantum computation
- Supervised learning with quantum enhanced feature spaces
- Logic gates at the surface code threshold: Superconducting qubits poised for fault-tolerant quantum computing
- Quantum Algorithms Revisited
- Simple pulses for elimination of leakage in weakly nonlinear qubits
- High-fidelity quantum logic gates using trapped-ion hyperfine qubits
- High-fidelity two-qubit quantum logic gates using trapped calcium-43 ions
- Robust randomized benchmarking of quantum processes
- Validating quantum computers using randomized model circuits
- High-fidelity preparation, gates, memory and readout of a trapped-ion quantum bit
- Efficient Z-Gates for Quantum Computing
- Procedure for systematically tuning up crosstalk in the cross resonance gate
- AC-Stark Shift and Dephasing of a Superconducting Qubit Strongly Coupled to a Cavity Field
- A simple all-microwave entangling gate for fixed-frequency superconducting qubits
- Semiclassical Fourier Transform for Quantum Computation
- Qubit-photon interactions in a cavity: Measurement induced dephasing and number splitting
- Realizing Rapid, High-Fidelity, Single-Shot Dispersive Readout of Superconducting Qubits
- Surface participation and dielectric loss in superconducting qubits
- Microwave quantum logic gates for trapped ions
- Fluctuations of Energy-Relaxation Times in Superconducting Qubits
- To catch and reverse a quantum jump mid-flight
- Dispersive regime of circuit QED: photon-dependent qubit dephasing and relaxation rates
- Characterization of addressability by simultaneous randomized benchmarking
- Realization of Deterministic Quantum Teleportation with Solid State Qubits
- Quantum trajectory approach to circuit QED: Quantum jumps and the Zeno effect
- Fast Reset and Suppressing Spontaneous Emission of a Superconducting Qubit
- Deterministic teleportation of a quantum gate between two logical qubits
- Randomized benchmarking and process tomography for gate errors in a solid-state qubit
- Experimental demonstration of fault-tolerant state preparation with superconducting qubits
- Process verification of two-qubit quantum gates by randomized benchmarking
- Arbitrary accuracy iterative phase estimation algorithm as a two qubit benchmark
- Optimal Quantum Measurements of Expectation Values of Observables
- Feedback control of a solid-state qubit using high-fidelity projective measurement
- Demonstration of weight-four parity measurements in the surface code architecture
- Efficient Bayesian Phase Estimation
- Experimental Bayesian Quantum Phase Estimation on a Silicon Photonic Chip
- Approximate Quantum Fourier Transform and Decoherence
- Quantum phase estimation of multiple eigenvalues for small-scale (noisy) experiments
- Quantum information and precision measurement
- Three Qubit Randomized Benchmarking
- Reducing unitary and spectator errors in cross resonance with optimized rotary echoes
- Machine learning for discriminating quantum measurement trajectories and improving readout
- Reduced phase error through optimized control of a superconducting qubit
- Demonstrating Heisenberg-limited unambiguous phase estimation without adaptive measurements
- Rapid Driven Reset of a Qubit Readout Resonator
- Investigating surface loss effects in superconducting transmon qubits
- Entanglement Stabilization using Parity Detection and Real-Time Feedback in Superconducting Circuits
- Error-corrected gates on an encoded qubit
- Non-linear dispersive regime of cavity QED: The dressed dephasing model
- Hardware for Dynamic Quantum Computing
- Low-Latency Digital Signal Processing for Feedback and Feedforward in Quantum Computing and Communication
- Tomography via Correlation of Noisy Measurement Records
- Reduction of heating rate in a microfabricated ion trap by pulsed-laser cleaning