QML: Rectangle with rounded corners and border width = 1 shows not good anti-aliasing

import QtQuick 
import QtQuick.Controls

Window {
    id: root

    visible: true
    width: 300
    height: 200

    Rectangle {
        anchors.centerIn: parent

        width: 200
        height: 100
        radius: height/2

        color: "white"

        border.width: 1
        border.color: "blue"
    }
}