Seminar

No fine tuning for a theory demands that the properties, which hold empirically, should also retain at the level of reality. In this talk, we will address the question: Is it possible to have no fine-tuned realist explanation for the distinguishability of quantum systems? This question is interconnected with another fundamental issue of whether the quantum state carries only epistemic information about the physical systems or is a part of the realist description of physical systems. We will derive a condition on the empirical probabilities as a consequence of 'no fine tuning for distinguishability' and point out that even two-dimensional quantum systems violate that condition. We will discuss the significance of such violations. Finally, we show how this phenomenon can be used in privacy-preserving quantum communication with a simple example.