  Super-resolution overcoming the standard quantum limit has been intensively
studied for quantum sensing applications of precision target detection over the
last decades. Not only higher-order entangled photons but also phase-controlled
coherent photons have been used to demonstrate the super-resolution. Due to the
extreme inefficiency of higher-order entangled photon-pair generation and
ultralow signal-to-noise ratio, however, quantum sensing has been severely
limited. Here, we report observations of coherently excited super-resolution
using phase-controlled coherent photons in a delayed-choice quantum eraser
scheme. Using phase manipulations of the quantum erasers, super-resolution has
been observed for higher-order intensity correlations between them, satisfying
the Heisenberg limit in phase resolution. This new type of precision
phase-detection technique opens the door to practical applications of quantum
sensing compatible with current technologies based on coherence optics.
