Mark Van Raamsdonk argues that the emergence of classical spacetime is closely related to quantum entanglement in a non-perturbative quantum gravity description. He suggests that when degrees of freedom in a quantum system become disentangled, the corresponding spacetime regions separate and pinch off, a process quantifiable by entanglement measures. The paper explores gauge/gravity duality, where certain quantum field theories are equivalent to quantum gravity theories. It shows that quantum superpositions of disconnected spacetimes can correspond to classically connected spacetimes, such as the eternal AdS black hole. The entanglement entropy between regions in a field theory is related to the area of a minimal surface in the dual spacetime. As entanglement decreases, the minimal surface area decreases and the proper distance between regions increases, leading to spacetime regions pulling apart. The mutual information between subsystems also decreases, indicating reduced correlations. In the case of the eternal AdS black hole, decreasing entanglement between two CFTs corresponds to increasing the inverse temperature parameter. The paper concludes that entanglement is crucial for the emergence of classical spacetime geometry.Mark Van Raamsdonk argues that the emergence of classical spacetime is closely related to quantum entanglement in a non-perturbative quantum gravity description. He suggests that when degrees of freedom in a quantum system become disentangled, the corresponding spacetime regions separate and pinch off, a process quantifiable by entanglement measures. The paper explores gauge/gravity duality, where certain quantum field theories are equivalent to quantum gravity theories. It shows that quantum superpositions of disconnected spacetimes can correspond to classically connected spacetimes, such as the eternal AdS black hole. The entanglement entropy between regions in a field theory is related to the area of a minimal surface in the dual spacetime. As entanglement decreases, the minimal surface area decreases and the proper distance between regions increases, leading to spacetime regions pulling apart. The mutual information between subsystems also decreases, indicating reduced correlations. In the case of the eternal AdS black hole, decreasing entanglement between two CFTs corresponds to increasing the inverse temperature parameter. The paper concludes that entanglement is crucial for the emergence of classical spacetime geometry.