Quantum Temporal Superposition: The Case of Quantum Field Theory.

  title={Quantum Temporal Superposition: The Case of Quantum Field Theory.},
  author={Laura J. Henderson and Alessio Belenchia and Esteban Castro-Ruiz and Costantino Budroni and Magdalena Zych and {\vC}aslav Brukner and Robert B. Mann},
  journal={Physical review letters},
  volume={125 13},
Quantum field theory is completely characterized by the field correlations between spacetime points. In turn, some of these can be accessed by locally coupling to the field simple quantum systems, also known as particle detectors. In this letter we consider what happens when a quantum-controlled superposition of detectors at different space-time points is used to probe the correlations of the field. We show that, due to quantum interference effects, two detectors can gain information on field… Expand

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