A simple example of a "measurement effect" is the quantum zeno effect [1]. You can steer a system by making a series of measurements and gradually transitioning

A simple example of a "measurement effect" is the quantum zeno effect [1]. You can steer a system by making a series of measurements and gradually transitioning the measurement axis from aligning with the initial state to aligning with the target state [2]. For example, placing a diagonal polarizer between a horizontal and vertical polarizer will allow light to pass through [3]. As you use more and more polarizers that gradually transition from horizontal to vertical, you converge on a mechanism for rotating horizontally polarized photons into vertically polarized photons without loss. 1: https://en.wikipedia.org/wiki/Quantum_Zeno_effect https://en.wikipedia.org/wiki/Quantum_Zeno_effect 2: http://algorithmicassertions.com/quantum/2015/10/26/Quantum-Zeno-Effect.html http://algorithmicassertions.com/quantum/2015/10/26/Quantum-... 3: https://youtu.be/PJHCADY-Bio?t=6m45s https://youtu.be/PJHCADY-Bio?t=6m45s