Concatenated continuous driving of silicon qubit by amplitude and phase modulation

Abstract

The rate of coherence loss is lower for a qubit under the Rabi drive than a freely evolving qubit $T_2^{\mathrm{Rabi}}>T_2^{\ast }$. Building on this principle, concatenated continuous driving (CCD) keeps the qubit under continuous drive to suppress noise and manipulate dressed states by either phase or amplitude modulation. In this work, we propose a variant of CCD which simultaneously modulates both the amplitude and phase of the driving field to generate a circularly polarized field in the rotating frame of the carrier frequency. This circular-modulated CCD(CMCCD) cancels the counter-rotating term in the second rotating frame, eliminating a systematic pulse-area error that arises from an imperfect rotating wave approximation for fast gates. Numerical simulations demonstrate that the proposed CMCCD achieves higher gate fidelity than conventional CCD schemes. We further implement and compare different CCD protocols using an electron spin-qubit in an isotopically purified ${}^{28}$Si-MOS quantum dot and evaluate its robustness by applying static detuning and Rabi frequency errors. The robustness is significantly improved compared with the standard Rabi drive, showing the effectiveness of this scheme for qubit arrays with variation in qubit frequency, coupling to the Rabi drive, and low-frequency noise. The proposed scheme can be applied to various physical systems, including trapped atoms, cold atoms, superconducting qubits, and NV centers.

arXiv comment15 pages, 14 figures

References in corpus (43)

• Quantum Computing in the NISQ era and beyond
• Quantum sensing
• Surface codes: Towards practical large-scale quantum computation
• Quantum Simulation
• Spins in few-electron quantum dots
• Quantum metrology
• Single-shot read-out of an individual electron spin in a quantum dot
• Randomized Benchmarking of Quantum Gates
• An addressable quantum dot qubit with fault-tolerant control fidelity
• Fault-tolerant quantum computation with high threshold in two dimensions
• Electron spin decoherence in quantum dots due to interaction with nuclei
• Computing with spin qubits at the surface code error threshold
• Quantum simulation of a Fermi-Hubbard model using a semiconductor quantum dot array
• Quantum Gates and Memory using Microwave Dressed States
• Robust dynamical decoupling with concatenated continuous driving
• Silicon qubit fidelities approaching incoherent noise limits via pulse engineering
• Review of performance metrics of spin qubits in gated semiconducting nanostructures
• Quantifying the quantum gate fidelity of single-atom spin qubits in silicon by randomized benchmarking
• Universal coherence protection in a solid-state spin qubit
• Coherence-protected Quantum Gate by Continuous Dynamical Decoupling in Diamond
• Hyperfine interactions in silicon quantum dots
• A Dressed Spin Qubit in Silicon
• Protecting a solid-state spin from decoherence using dressed spin states
• Demonstration of a dressed-state phase gate for trapped ions
• Narrow-bandwidth sensing of high-frequency fields with continuous dynamical decoupling
• Room temperature coherent control of protected qubit in hexagonal boron nitride
• Interface induced spin-orbit interaction in silicon quantum dots and prospects for scalability
• Low charge noise quantum dots with industrial CMOS manufacturing
• The SMART protocol -- Pulse engineering of a global field for robust and universal quantum computation
• Continuous dynamical decoupling utilizing time-dependent detuning
• A 300 mm foundry silicon spin qubit unit cell exceeding 99% fidelity in all operations
• Experimental realization of time-dependent phase-modulated continuous dynamical decoupling
• Quantum Computation Protocol for Dressed Spins in a Global Field
• Hotter is easier: unexpected temperature dependence of spin qubit frequencies
• Implementation of the SMART protocol for global qubit control in silicon
• Coherence protection and decay mechanism in qubit ensembles under concatenated continuous driving
• Protecting quantum spin coherence of nanodiamonds in living cells
• Observation of high-order Mollow triplet by quantum mode control with concatenated continuous driving
• Bounds to electron spin qubit variability for scalable CMOS architectures
• Protecting Quantum Information via Destructive Interference of Correlated Noise
• High Fidelity Control of a Nitrogen-Vacancy Spin Qubit at Room Temperature using the SMART Protocol
• Entangling gates on degenerate spin qubits dressed by a global field
• A dressed singlet-triplet qubit in germanium