Lecture

Quantum memories: basics and applications

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Description

This lecture covers the fundamentals of quantum memories, including photon echoes, atomic frequency comb (AFC) quantum memory, and time multiplexing. It explores the coherent light-matter interactions, Bloch sphere, and inhomogeneous dephasing. The instructor discusses the challenges and solutions in achieving linear storage processes and the complex optical setups required for optical data storage. Additionally, the lecture delves into storing optical photons as spin excitations and the AFC spin-wave memory in 151Eu3+:Y Sio. The AFC echo control of dephasing and experimental setups for quantum memories are also presented.

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Related concepts (32)

Computer data storage

Computer data storage is a technology consisting of computer components and recording media that are used to retain digital data. It is a core function and fundamental component of computers. The central processing unit (CPU) of a computer is what manipulates data by performing computations. In practice, almost all computers use a storage hierarchy, which puts fast but expensive and small storage options close to the CPU and slower but less expensive and larger options further away.

Canton of Geneva

The Canton of Geneva, officially the Republic and Canton of Geneva, is one of the 26 cantons forming the Swiss Confederation. It is composed of forty-five municipalities, and the seat of the government and parliament is in the City of Geneva. Geneva is the French-speaking westernmost canton of Switzerland. It lies at the western end of Lake Geneva and on both sides of the Rhone, its main river. Within the country, the canton shares borders with Vaud to the east, the only adjacent canton.

Geneva

Geneva (dʒəˈniːvə ; Genève ʒənɛv) is the second-most populous city in Switzerland (after Zürich) and the most populous city of Romandy, the French-speaking part of Switzerland. Situated in the south west of the country, where the Rhône exits Lake Geneva, it is the capital of the Republic and Canton of Geneva, and a center for international diplomacy. The city of Geneva (ville de Genève) had a population of 203,951 in 2020 (Jan. estimate) within its small municipal territory of , but the Canton of Geneva (the city and its closest Swiss suburbs and exurbs) had a population of 504,128 (Jan.

Optical storage

Optical storage refers to a class of data storage systems that use light to read or write data to an underlying optical media. Although a number of optical formats have been used over time, the most common examples are optical disks like the compact disc (CD) and DVD. Reading and writing methods have also varied over time, but most modern systems use lasers as the light source and use it both for reading and writing to the discs. Britannica notes that it "uses low-power laser beams to record and retrieve digital (binary) data.

Geneva Airport

Geneva Airport , formerly and still unofficially known as Cointrin Airport, is the international airport of Geneva, the second most populous city in Switzerland. It is located northwest of the city centre. It surpassed the 15-million-passengers-a-year mark for the first time in December 2014. The airport serves as a hub for Swiss International Air Lines and easyJet Switzerland.

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