Advanced Quantum Communications: An Engineering Approach by Sandor Imre, Laszlo Gyongyosi

By Sandor Imre, Laszlo Gyongyosi

Content material:
Chapter 1 creation (pages 1–10):
Chapter 2 creation to Quantum info conception (pages 11–64):
Chapter three The Classical Capacities of Quantum Channels (pages 65–125):
Chapter four The Quantum skill of Quantum Channels (pages 126–155):
Chapter five Geometric Interpretation of Quantum Channels (pages 156–217):
Chapter 6 Additivity of Quantum Channel Capacities (pages 218–268):
Chapter 7 Superactivation of Quantum Channels (pages 269–324):
Chapter eight Quantum safeguard and privateness (pages 325–361):
Chapter nine Quantum conversation Networks (pages 362–387):
Chapter 10 fresh advancements and destiny instructions (pages 388–412):

Show description

Read Online or Download Advanced Quantum Communications: An Engineering Approach PDF

Best computer vision & pattern recognition books

Kernel methods in computer vision

Few advancements have motivated the sector of machine imaginative and prescient within the final decade greater than the creation of statistical computer studying concepts. rather kernel-based classifiers, comparable to the aid vector computing device, became essential instruments, offering a unified framework for fixing quite a lot of image-related prediction projects, together with face acceptance, item detection, and motion class.

Fourier Vision: Segmentation and Velocity Measurement using the Fourier Transform

Fourier imaginative and prescient presents a brand new remedy of figure-ground segmentation in scenes comprising obvious, translucent, or opaque gadgets. Exploiting the relative movement among determine and floor, this system offers explicitly with the separation of additive indications and makes no assumptions in regards to the spatial or spectral content material of the pictures, with segmentation being performed phasor via phasor within the Fourier area.

Two-Dimensional Change Detection Methods: Remote Sensing Applications

Switch detection utilizing remotely sensed photographs has many functions, comparable to city tracking, land-cover swap research, and catastrophe administration. This paintings investigates two-dimensional swap detection equipment. the present equipment within the literature are grouped into 4 different types: pixel-based, transformation-based, texture analysis-based, and structure-based.

Evolution of Broadcast Content Distribution

This ebook discusses possibilities for broadcasters that come up with the appearance of broadband networks, either fastened and cellular. It discusses how the normal means of allotting audio-visual content material over broadcasting networks has been complemented through the use of broadband networks. the writer indicates how this additionally offers the prospect to provide new varieties of interactive or so-called nonlinear prone.

Additional resources for Advanced Quantum Communications: An Engineering Approach

Sample text

The density matrix ρ of a simple pure quantum system which can be given in the state vector representation |ψ〉 = α|0〉 + β|1〉 can be expressed as the outer product of the ket and bra vectors, where bra is the transposed complex conjugate of ket, α  hence for ψ =   , ψ = [α * β * ] the density matrix is β  2 αβ *  αα * αβ *   α = β* ] =  * . 3) The density matrix ρ = ∑ in=1 pi ψ i ψ i contains the probabilistic mixture of different pure states, representation of which is based on the fact that the mixed states can be decomposed into the weighted sum of pure states.

40) i =1 This density matrix is a diagonal matrix with the probabilities in the diagonal entries  p1 0 ρ=   0 0 0 p2 0 0 0  . 42) l =1 where ∑ ln=1 pi = 1. 2 The Projective and POVM Measurement The projective measurement is also known as the von Neumann measurement and formally can be described by the Hermitian operator Z, which has the spectral decomposition Z= ∑λ P . 43) m where Pm is a projector to the eigenspace of Z with eigenvalue λm. 44) 22 CHAPTER 2 Introduction to Quantum Information Theory and they are pairwise orthogonal.

70) = , 2 2 where r′ = UrU† realizes a unitary transformation on r as a rotation (see Fig. 2). 71) where 0 ≤ γ ≤ 1, and ρ1 and ρ2 are pure states, and lie on a line segment connecting the density matrices in the Bloch sphere representation. Using probabilistic mixtures of the pure density matrices, any quantum state which lies between the two states can be expressed as a convex combination ρ = pρ1 + (1 − p ) ρ2 , 0 ≤ p ≤ 1. 72) This remains true for an arbitrary number of quantum states, hence this result can be expressed for arbitrary number of density matrices.

Download PDF sample

Rated 4.11 of 5 – based on 33 votes