Spatially extended Unruh-DeWitt detectors for relativistic quantum information

Understand

Unruh-DeWitt detectors interacting locally with a quantum field are systems under consideration for relativistic quantum information processing.

• In most works, the detectors are assumed to be point-like and, therefore, couple with the same strength to all modes of the field spectrum.
• We propose the use of a more realistic detector model where the detector has a finite size conveniently tailored by a spatial profile.
• We design a spatial profile such that the detector, when inertial, naturally couples to a peaked distribution of Minkowski modes.