Quantum qubit switch: entropy and entanglement
arXiv:1709.02407
Abstract
The quantum entanglement is considered as one of the most important notions of quantum computing. The entanglement is a feature of quantum systems and it is used as a basis for many quantum algorithms and protocols. In this paper we analyze the level of entanglement for the quantum switch, during its work. The level of entanglement during the correct operating may be compared with the situation when a noise is present in the analyzed system. The noise changes the level of quantum entanglement and we utilize this observation to evaluate if the switch works properly. We present the formulae describing the value of entanglement with use of the Concurrence measure and also the value of entropy. Both mentioned values may be utilized to detect the noise during the operating of quantum switch.
22 pages, 10 figures
References in corpus (10)
- Quantum entanglement
- Entanglement of Formation of an Arbitrary State of Two Qubits
- Experimental quantum teleportation
- Separability Criterion for Density Matrices
- Entanglement detection
- A simple formula for the average gate fidelity of a quantum dynamical operation
- Fidelity of quantum operations
- Fidelity of Single Qubit Maps
- On quantum channels
- Generalised quantum weakest preconditions