We propose an optical circuit for attaining quantum measurement advantage in a system that has no quantum entanglement.Our device produces Mineral Water symmetric two-qubit X-states with controllable anti-diagonal elements, and does not require entangled states as input.We discuss the use of this device in a two-qubit quantum game.When entanglement is absent, the maximum quantum advantage in this game is 1/3 bit.A slightly diminished quantum advantage, 0.
311 bit, can be realized Jackets with a simplified transaction protocol.