Coherence Characteristics of a GaAs Single Heavy-Hole Spin Qubit Using a Modified Single-Shot Latching Readout Technique

We present an experimental study of the coherence properties of a single heavy-hole spin qubit formed in one quantum dot of a gated GaAs/AlGaAs double quantum dot device. We use a modified spin-readout latching technique in which the second quantum dot serves both as an auxiliary element for a fast...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2023-03, Vol.13 (5), p.950
Main Authors: Marton, Victor, Sachrajda, Andrew, Korkusinski, Marek, Bogan, Alex, Studenikin, Sergei
Format: Article
Language:English
Subjects:
Amplitudes
Analysis
Coherence
GaAs
Gallium arsenide
Mechanical properties
Microwaves
Quantum dots
Qubits (quantum computing)
Rabi oscillations
Ramsey
single hole
spin qubit
spin readout
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Summary:We present an experimental study of the coherence properties of a single heavy-hole spin qubit formed in one quantum dot of a gated GaAs/AlGaAs double quantum dot device. We use a modified spin-readout latching technique in which the second quantum dot serves both as an auxiliary element for a fast spin-dependent readout within a 200 ns time window and as a register for storing the spin-state information. To manipulate the single-spin qubit, we apply sequences of microwave bursts of various amplitudes and durations to make Rabi, Ramsey, Hahn-echo, and CPMG measurements. As a result of the qubit manipulation protocols combined with the latching spin readout, we determine and discuss the achieved qubit coherence times: T1, TRabi, T2*, and T2CPMG vs. microwave excitation amplitude, detuning, and additional relevant parameters.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano13050950