Basics of quantum measurement with quantum light by Michael Hatridge скачать в хорошем качестве

Basics of quantum measurement with quantum light by Michael Hatridge

DATE: 04 June 2018 to 13 June 2018 VENUE:Ramanujan Lecture Hall, ICTS Bangalore Non-Hermitian Physics-"Pseudo-Hermitian Hamiltonians in Quantum Physics (PHHQP) XVIII" is the 18th meeting in the series that is being held over the years in Quantum Physics. The scope of the program on Non-Hermitian Physics is highly interdisciplinary, being aimed at mathematicians, theoretical physicists as well as experimental physicists who are working on different aspects of non-Hermitian physics. The purpose is to bring together experienced as well as young scientists, graduate students and postdoctoral fellows who are working actively and/or interested in working on various aspect of quantum as well as classical physics in which non-Hermitian phenomena play important roles. Broad topics that will be included (but not restricted to) under the umbrella of non-Hermitian systems in this program are: Non-Hermitian / Pseudo-Hermitian quantum theories Open quantum systems (recent theoretical developments, state-of-the-art numerical advances and experimental progress) Applications in Optics and Non-equilibrium statistical mechanics Cavity-QED and circuit-QED systems (Hybrid Quantum Systems), Quantum Gases in Cavities, Quantum Devices Recent developments in PT-symmetric systems (theory and experiment) PT-symmetric discrete systems with applications in condensed matter and photonics Non-Hermitian systems are not only of fundamental interest in physics and mathematics but have also been instrumental in technological advances. For example, the ideas of non-Hermitian physics have recently been used for the realization of novel quantum devices such as microwave amplifiers, masers (lasers in microwave regime) and quantum diodes. This program will also provide the platform to discuss the recent important role of non-Hermitian physics for future technologies. During the program, we will have the following pedagogical lectures: Aditi Mitra ( New York University, USA) - Keldysh formalism Ali Mostafazadeh (Koc University, Turkey) - Time-independent scattering theory and its dynamical formulation Michael Hatridge (University of Pittsburgh, USA) / R. Vijayaraghavan (Tata Institute of Fundamental Research, Mumbai) - Quantum measurements with superconducting devices During the program, Prof. Michael Berry (H H Wills Physics Laboratory, Bristol, UK) will be delivering the Infosys - ICTS Chandrasekhar Lectures. INTERNATIONAL ADVISORY COMMITTEE: A. Andrianov (St Petersburg, Russia) C. M. Bender (St. Louis, USA) D. Christodoulides (CREOL, USA) A. Fring (City University, London) R. Gopakumar (ICTS-TIFR, India) N. Hatano (IIS,Tokyo) S. R. Jain (BARC, Mumbai) A. Mostafazadeh (Koc University, Turkey) I. Rotter (MPI, Dresden) A. D. Stone (Yale, USA) Gunter Wunner (Stuttgart, Germany) [email protected] PROGRAM LINK:https://www.icts.res.in/program/nhp2018 Table of Contents (powered by https://videoken.com) 0:00:00 Non-Hermitian Physics - PHHQP XVIII 0:00:10 Basics of quantum measurement with quantum light 0:02:19 Quantum light - Fock states 0:04:25 Quantum light - coherent states 0:06:18 Quantum light - squeezed states 0:07:30 What to do with quantum light? 0:08:53 We must match the light to its detector 0:13:46 Classical (microwave) amplifier 0:15:56 Amplifiers have many properties 0:17:34 Quantum limit on phase-preserving amplifier 0:19:43 Outline for the remainder of our tutorials 0:21:24 Introduction to parametric amplifier 0:23:30 Parametrically driven couplings 0:31:47 System Dynamics - Phase preserving amplification 0:33:25 System Dynamics continued 0:34:49 Switch to Fourier Domain 0:36:31 Input - Output Theory 0:38:13 Closed form solution 0:41:58 Gain vs. pump power 0:43:22 Amplifier bandwidth vs. gain and mode bandwidth 0:44:31 Amplifier Limitations 0:45:18 Limitation 3: Gain Saturation 0:47:18 But it is quantum limited! 0:49:34 Phase-sensitive amplifier 0:54:31 Classifying amplifiers* 1:00:17 What about still odder couplings? 1:02:36 Other Couplings: Photon conversion 1:08:27 Amplifiers outputs are squeezed light! 1:09:08 Two-mode Squeezing 1:10:00 Amplification is a unitary transformation 1:10:41 Experimental Evidence 1:11:47 So when do we measure? 1:12:57 The Story so far 1:13:44 Qubits and entanglement 1:14:19 What is 'Quantum Information'? 1:14:48 Now put it all together 1:15:19 Enter superconducting circuits 1:16:17 The Josephson tunnel junction 1:17:14 Superconducting transmon qubit 1:18:21 Isolating the transmon from the environment 1:18:50 The 8-junction Josephson Parametric Converter 1:19:45 What a quantum machine looks like 1:20:22 Measurement via flying qubits 1:21:26 Q&A