Quantum entanglement, a defining feature of quantum theory, is generated dynamically by the
Schwinger effect—the production of particle-antiparticle pairs from a strong electric field. In this
work, we go beyond traditional particle-number analyses to study the quantum entanglement gen-
erated in this process. We partition the system into momentum modes and calculate entanglement
entropy and logarithmic negativity as functions of time. For a single Sauter pulse, entanglement
exhibits a monotonic growth that closely tracks the pair creation process. Strikingly, a train of
alternating pulses induces coherent interference, leading to a cumulative enhancement of entan-
glement and revealing a clear interplay between successive creation events. Most significantly, we
show that the temporal delay (𝑇) between pulses acts as a tunable parameter, controlling the level
of entanglement via constructive or destructive interference. This tunability provides a distinct sig-
nature of vacuum memory, establishing pair production as a platform for entanglement-controlled
strong-field physics.