Dynamics of probing a quantum-dot spin qubit with superconducting resonator photons.

ABSTRACT: The hybrid system of electron spins and resonator photons is an attractive architecture for quantum computing owing to the long coherence times of spins and the promise of long-distance coupling between arbitrary pairs of qubits via photons. For the device to serve as a building block for a quantum processer, it is also necessary to readout the spin qubit state. Here we analyze in detail the measurement process of an electron spin singlet-triplet qubit in quantum dots using a coupled superconducting resonator. We show that the states of the spin singlet-triplet qubit lead to readily observable features in the spectrum of a microwave field through the resonator. These features provide useful information on the hybrid system. Moreover, we discuss the working points which can be implemented w

SUBMITTER: Zhu XY 

PROVIDER: S-EPMC6202405 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature