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This brief presents a power-efficient approach for generating control pulses for semiconductor spin qubits that combines the flexibility of room-temperature electronics with the scalability of cryogenic electronics. By demultiplexing ramp pulses generated at room temperature, capacitive loads are charged adiabatically, greatly reducing power dissipation. [...]

We study, classify, and explore the mathematical properties of finite-dimensional Lie algebras occurring in the quantum dynamics of single-mode and self-interacting bosonic systems. These Lie algebras are contained in the real skew-hermitian Weyl algebra $\hat{A}_1$, defined as the real subalgebra of the Weyl algebra $A_1$ consisting of all skew-hermitian polynomials. [...]