High Fidelity Single-Shot Singlet-Triplet Readout of Precision Placed Donors in Silicon

Abstract

In this work we perform direct single-shot readout of the singlet-triplet states in exchange coupled electrons confined to precision placed donor atoms in silicon. Our method takes advantage of the large energy splitting given by the Pauli-spin blockaded (2,0) triplet states, from which we can achieve a single-shot readout fidelity of 98.4$\pm$0.2%. We measure the triplet-minus relaxation time to be of the order 3s at 2.5T and observe its predicted decrease as a function of magnetic field, reaching 0.5s at 1T.

arXiv comment8 pages, 4 figures - DEV053 - Team Viper

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Cited by in corpus (22)

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• Integrated silicon qubit platform with single-spin addressability, exchange control and robust single-shot singlet-triplet readout
• Rapid high-fidelity spin state readout in Si/SiGe quantum dots via radio-frequency reflectometry
• High-fidelity single-shot readout for a spin qubit via an enhanced latching mechanism
• Fast and high-fidelity state preparation and measurement in triple-quantum-dot spin qubits
• Addressable electron spin resonance using donors and donor molecules in silicon
• A silicon singlet-triplet qubit driven by spin-valley coupling
• Readout Of Singlet-Triplet Qubits At Large Magnetic Field Gradients
• Single-shot readout of a driven hybrid qubit in a GaAs double quantum dot
• Robust energy selective tunneling readout of singlet triplet qubits under large magnetic field gradient
• Generalized figure of merit for qubit readout
• Zero field optical magnetic resonance study of phosphorus donors in 28-silicon
• Acceptor-based qubit in silicon with tunable strain
• Excited states of defect lines in silicon: A first-principles study based on hydrogen cluster analogues
• Low Temperature Relaxation of Donor Bound Electron Spins in ${}^{28}$Si:P
• Singlet-triplet minus mixing and relaxation lifetimes in a double donor dot
• Silicon Donor Array as a Disordered One-Dimensional Electron Gas
• Certification of spin-based quantum simulators