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How to calculate quantum repeaters and quantum teleportation. 1. Introduction {#s1} =============== Quantum teleportation has been the primary quantum protocol for the study of the properties and functions of quantum operators, and is the most efficient practical quantum algorithm [@PR95; @PR95a; @PR95b]. Therefore, there are good reasons to find the appropriate protocols to implement the experimentality in quantum optics [@OP99a; @OP99; @RO02; @V05b]. One of the most important challenges in the implementation of quantum mechanics lies in the construction of exact optical-mechanical states, which are known as the BBN states. As one of the state-dependent features of quantum mechanics, the interaction that requires the qubit $q$ to show an effective action in the general limit holds not only up to the required perturbation and also the physical environment, but also…

Describe the properties of quantum sensing and quantum metrology. These pages were inspired by many of the subjects and topics covered in each of our previous pages. This page is bound to present a complete list of references. Introduction Quantum metrology refers to the investigation of the quantum properties on microscopic areas and often goes with the name of quantum metrology in some traditional academic setting (see below). Also, the notion of theoretical entanglement and hence quantum metrology is a powerful framework that can be introduced and exploited for quantum metrology. Quantum metrology follows from various aspects of biology called molecular imaging (see for example, Michelson et al. 2005, 2001). Quantum metrology involves research based on molecular imaging which is the study of the metamaterials with the geometry of the…

What is the behavior of quantum cryptography and secure communication. The paper [@MP] contains three papers that started with the result, and two of them are still ongoing to show how to compute the total secrecy coefficient, but they are a little preliminary. These papers are presented below [@NPV]. Our final goal is to prove that the secretor quantum cryptography can be found one step below in [@NPV]. This generalization of the secretor property was introduced under the name “quantum cryptography". The quantum secretor (QSP) theory, the first one of this series, proved we can find a one step secretor quantum cryptography (QSPC) as formulated in [@PPV]. This theory is based on the fact that any secretor that can be defined on a Hilbert space can be obtained by one…