Analysis of quantum linear systems’ response to multi-photon states

Coherent states of quantum non-linear systems

Quantum dynamics of integrable systems is discussed. Localized wave packets generalizing the conventional coherent states of minimal uncertainty are constructed. The wave packet moves along a certain trajectory and does not change its shape for times of order 1 h̄ . In this Letter we suggest that the definition of a coherent state should be related to the Hamiltonian.The conventional coherent st...

Multi-photon quantum interferometry

Quantum entanglement – multi-photon sources

Entanglement lies in the heart of almost all methods of quantum communication and computation. Efficient and economical generation of entangled states of light are of crucial importance for the success of future quantum communication applications. This article introduces the experimental methods to produce entangled light modes both in the discrete and continuous variable regime.

Decoherence effects on quantum Fisher information of multi-qubit W states

Quantum fisher information of a parameter characterizing the sensitivity of a state with respect to parameter changes. In this paper, we study the quantum fisher information of the W state for four, five, six and seven particles in decoherence channels, such as amplitude damping, phase damping and depolarizing channel. Using Krauss operators for decoherence channels components, we investigate t...

A new Approach to the Multi-Objective Control of Linear Singular Perturbation Systems