It is often stated that quantum mechanics only makes statistical predictions and that a quantum state is described by the various probability distributions associated with it. Can we describe a quantum state completely in terms of probabilities and then use it to describe quantum dynamics? What is the origin of the probability distribution for a maximally specified quantum state? Is quantum mec...

We analyse a central broadcast continuous variable quantum key distribution protocol in which beam produced by thermal source is used to create secret between two parties, Alice and Bob. A splitter divides the initial into pair of output beams, are sent Bob, with Eve intercepting Bob's beam. investigate detail, calculating mutual informations through analytic methods comparing results outputs M...

We revisit the application of neural networks to quantum state tomography. confirm that positivity constraint can be successfully implemented with trained convert outputs from standard feed-forward valid descriptions states. Any neural-network architecture adapted our method. Our results open possibilities use state-of-the-art deep-learning methods for reconstruction under various types noise.