Perfect Zeno-like effect through imperfect measurements at a finite frequency

TL;DR

This paper demonstrates that quantum states can be perfectly frozen using realistic, imperfect measurements conducted at finite frequencies, challenging the traditional view that infinitely frequent perfect measurements are necessary.

Contribution

It introduces a method to achieve the quantum Zeno effect with non-projective measurements at finite frequency, broadening the understanding of quantum state control.

Findings

Perfect freezing achieved with imperfect, finite-frequency measurements

Challenging the need for infinitely frequent perfect measurements

Potential applications in quantum control and information processing

Abstract

The quantum Zeno effect is usually thought to require infinitely frequent and perfect projective measurements to freeze the dynamics of quantum states. We show that perfect freezing of quantum states can also be achieved by more realistic non-projective measurements performed at a finite frequency.