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Figure 18 | EPJ Quantum Technology

Figure 18

From: The deep space quantum link: prospective fundamental physics experiments using long-baseline quantum optics

Figure 18

Alternative scheme for human-decision Bell test. Artemis astronauts on the Moon, and astronauts at the Earth-Moon L3 point or beyond, are queried at time \(t_{\mathrm{question}}\). Both astronauts make a decision within the human reaction time \(t_{\mathrm{choice}}\). This answer is locally cached until time \(t_{\mathrm{transmit}}\), when a classical signal is sent to unmanned measurement spacecraft “Alice” and “Bob”. A light source, located on or near to Earth, emits entangled photons toward Alice and Bob before intersection of the world line of the source and light cones of the query events, i.e., with no chance that the emitted photons could have been influenced by the measurement basis choices of the astronauts

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