Abstract:

With the progress and development of society, the importance of quantum technology in national security and the high-quality development of social economy has gradually emerged. In research on quantum information, such as quantum computing and quantum communication, manipulating quantum states to store, transmit, and process information has always been a critical problem. Contrary to conventional knowledge, quantum systems enable unique control that does not exist in the classical world, one of which is counterfactual quantum control. As a nonlocal quantum control method, there is no exchange of any physical particles and energy between the controller and the controlled target during the control process. By investigating counterfactual quantum control, we not only clarified non-local quantum phenomena but also discovered vital potential applications, such as noninvasive imaging and stealth detection technology. In this paper, we introduce the concepts of counterfactual quantum control and the corresponding theory. In addition, we present a review of related experimental verifications and research on non locality and its applications.

Key words: counterfactual quantum control, non locality, quantum interference, interaction-free measurement, quantum Zeno effect