Suppression of Phase Decoherence in a Single Atomic Qubit

TL;DR

This paper demonstrates that applying specific pulse sequences can significantly reduce phase decoherence in a single atomic qubit, enhancing its coherence time by mitigating noise from laser and magnetic field fluctuations.

Contribution

It introduces an effective method using pulse sequences to suppress phase decoherence in atomic qubits, improving coherence times beyond traditional spin echo techniques.

Findings

Pulse sequences extend qubit coherence time substantially.

Noise from laser and magnetic fluctuations is effectively mitigated.

Enhanced coherence improves potential for quantum information processing.

Abstract

We study the suppression of noise-induced phase decoherence in a single atomic qubit by employing pulse sequences. The atomic qubit is composed of a single neutral atom in a far-detuned optical dipole trap and the phase decoherence may originate from the laser intensity and beam pointing fluctuations as well as magnetic field fluctuations. We show that suitable pulse sequences may prolongate the qubit coherence time substantially as comparing to the conventional spin echo pulse.