Resonant-pulse operations on the buried donor charge qubits in semiconductors

TL;DR

This paper proposes a microwave-resonant scheme for fast one-qubit operations on buried donor charge qubits in semiconductors, demonstrating weak decoherence effects suitable for experimental implementation.

Contribution

It introduces a novel resonant-pulse method for manipulating double-donor charge qubits using microwave pulses tuned to an auxiliary molecular level.

Findings

Fast one-qubit operations achievable with microwave pulses

Decoherence effects are weak enough for practical use

Applicable to P$_2^+$:Si systems

Abstract

A new scheme is proposed for rotations of a double-donor charge qubit whose logical states are defined by the two lowest energy states of a single electron localized around one or another donor. It is shown that making use of the microwave pulses tuned to the resonance with an auxiliary excited molecular level allows for implementation of various one-qubit operations in very short times. Decoherence effects are analyzed by the example of the P$_2^+$:Si system and shown to be weak enough for experimental realization of this scheme being possible.