Publications by authors named "Eggli R"
Semiconductor spin qubits offer the potential to employ industrial transistor technology to produce large-scale quantum computers. Silicon hole spin qubits benefit from fast all-electrical qubit control and sweet spots to counteract charge and nuclear spin noise. However, the demonstration of a two-qubit interaction has remained an open challenge.
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- Silicon quantum dots are being explored for spin qubit applications because of their strong intrinsic spin-orbit coupling, which influences hole-spin dynamics.
- The study demonstrates a singlet-triplet qubit using hole states in a metal-oxide-semiconductor double quantum dot, achieving rapid control with oscillations up to 400 MHz and a maximum coherence time of 1.3 μs.
- This research identifies ways to enhance qubit performance and lays the groundwork for scaling up to larger arrays of qubits in two-dimensional configurations.
The spin-orbit interaction in spin qubits enables spin-flip transitions, resulting in Rabi oscillations when an external microwave field is resonant with the qubit frequency. Here, we introduce an alternative driving mechanism mediated by the strong spin-orbit interactions in hole spin qubits, where a far-detuned oscillating field couples to the qubit phase. Phase-driving at radio frequencies, orders of magnitude slower than the microwave qubit frequency, induces highly nontrivial spin dynamics, violating the Rabi resonance condition.
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