6.453 Quantum Optical Communication Reading 19
نویسنده
چکیده
Today we will complete our two-lecture treatment of semiclassical versus quantum photodetection theory in continuous time, focusing our attention on the coherent detection scenarios of homodyne and heterodyne detection. As we did last time for direct detection, we will build these theories in a scalar-wave, quasimonochromatic framework in which there is no (x, y) dependence for the fields illuminating the active region of the photodetector. The particular tasks we have set for today’s lecture are like those we pursued last time: develop the semiclassical and quantum photodetection statistical models for homodyne and heterodyne detection, and exhibit some continuous-time signatures of non-classical light. However, because the signatures that we will examine rely on noise spectral densities, it will be useful for us to back up and elaborate on the direct-detection photocurrent noise spectrum that we considered briefly in the Lecture 18.
منابع مشابه
6.453 Quantum Optical Communication Reading 1
Welcome to 6.453, Quantum Optical Communication. It is one of a collection of MIT classes that deals with aspects of an emerging field known as quantum information science. As you can divine from its title, 6.453 is about quantum communication, rather than quantum computation, although both of these topics fall under the general rubric of quantum information science. Moreover, 6.453 is far from...
متن کامل6.453 Quantum Optical Communication Reading 11
Reading: For the quantum theory of beam splitters: • C.C. Gerry and P.L. Knight, Introductory Quantum Optics (Cambridge University Press, Cambridge, 2005) Sect. 6.2. For the quantum theory of linear amplifiers: • C.M. Caves, “Quantum limits on noise in linear amplifiers,” Phys. Rev. D 26, 1817–1839 (1982). • L. Mandel and E. Wolf, Optical Coherence and Quantum Optics (Cambridge University Press...
متن کامل6.453 Quantum Optical Communication Reading 17
Today we move on to the final section of material on quantum optical communication: the full multi-temporal mode treatments of electromagnetic field quantization, photodetection theory, nonlinear optics, non-classical light generation, and quantum interference. Because our prerequisite subjects—6.011 and 18.06—do not include enough background for these topics, we’ll tread gently. Hence there wi...
متن کامل6.453 Quantum Optical Communication Reading 12
In this lecture will continue our quantum-mechanical treatment of linear attenuators and linear amplifiers. Among other things, we will distinguish between phaseinsensitive and phase-sensitive amplifiers. We will also show that the attenuator and the phase-insensitive amplifier preserve classicality, i.e., their outputs are classical states when their inputs are classical states. Finally, we wi...
متن کامل6.453 Quantum Optical Communication Reading 16
In this lecture we will examine the first commercial application of quantum optical communication: quantum cryptography. We’ll start with a purely classical case, and show that a one-time pad provides totally secure digital communication. The difficulty of creating a shared one-time pad between remote sites will then lead us into quantum cryptography, or, more properly, quantum key distribution...
متن کامل6.453 Quantum Optical Communication Reading 18
Today we begin a two-lecture treatment of semiclassical versus quantum photodetection theory in a continuous-time setting. We’ll build these theories in a slightly simplified framework, i.e., scalar fields with no (x, y) dependence illuminating the active region of a photodetection that lies within a region A of area A in a constant-z These scalar fields may be regarded as being linearly polari...
متن کامل