In quantum mechanics, a two-state system (also known as a two-level system) is a quantum system that can exist in any quantum superposition of two independent (physically distinguishable) quantum states. The Hilbert space describing such a system is two-dimensional. Therefore, a complete basis spanning the space will consist of two independent states. Any two-state system can also be seen as a qubit. Two-state systems are the simplest quantum systems that are of interest, since the dynamics of a one-state system is trivial (as there are no other states the system can exist in). The mathematical framework required for the analysis of two-state systems is that of linear differential equations and linear algebra of two-dimensional spaces. As a result, the dynamics of a two-state system can be solved analytically without any approximation. The generic behavior of the system is that the wavefunction's amplitude oscillates between the two states. A very well known example of a two-state system is the spin of a spin-1/2 particle such as an electron, whose spin can have values +ħ/2 or −ħ/2, where ħ is the reduced Planck constant. The two-state system cannot be used as a description of absorption or decay, because such processes require coupling to a continuum. Such processes would involve exponential decay of the amplitudes, but the solutions of the two-state system are oscillatory. (Wikipedia).
Peter Zoller: Introduction to quantum optics - Lecture 4
Abstract: Quantum optical systems provides one of the best physical settings to engineer quantum many-body systems of atoms and photons, which can be controlled and measured on the level of single quanta. In this course we will provide an introduction to quantum optics from the perspective
From playlist Mathematical Physics
Peter Zoller: Introduction to quantum optics - Lecture 2
Abstract: Quantum optical systems provides one of the best physical settings to engineer quantum many-body systems of atoms and photons, which can be controlled and measured on the level of single quanta. In this course we will provide an introduction to quantum optics from the perspective
From playlist Mathematical Physics
The Atom B2 The Quantum Mechanical Picture of the Atom
The quantum mechanical model of the atom.
From playlist Physics - The Atom
Peter Zoller: Introduction to quantum optics - Lecture 1
Abstract: Quantum optical systems provides one of the best physical settings to engineer quantum many-body systems of atoms and photons, which can be controlled and measured on the level of single quanta. In this course we will provide an introduction to quantum optics from the perspective
From playlist Mathematical Physics
In Quantum Mechanics, can something be in two places at the same time?
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From playlist Science Unplugged: Quantum Mechanics
Peter Zoller: Introduction to quantum optics - Lecture 3
Abstract: Quantum optical systems provides one of the best physical settings to engineer quantum many-body systems of atoms and photons, which can be controlled and measured on the level of single quanta. In this course we will provide an introduction to quantum optics from the perspective
From playlist Mathematical Physics
Christine Silberhorn: Time-multiplexed quantum walks
Photonic quantum systems, which comprise multiple optical modes, have become an established platform for the experimental implementation of quantum walks. However, the implementation of large systems with many modes, this means for many step operations, a high and dynamic control of many d
From playlist Mathematical Physics
The Atom B3 The Quantum Mechanical Picture of the Atom
The quantum mechanical model of the atom.
From playlist Physics - The Atom
Wave-Particle Duality and other Quantum Myths
There are many misconceptions that have developed around quantum mechanics. I'm here to correct them with a discussion of wave functions, probability, and the Heisenberg uncertainty principle. ________________________________ VIDEO ANNOTATIONS/CARDS What is a Quantum Field?!? https://yout
From playlist Quantum Physics
The Language of Quantum Physics is Strange | PHYSICS EXPLAINED
This is how Quantum Physicists communicate their ideas Hi guys, so I wanted to make a video explaining some of the notation used by quantum physicists to describe their ideas. There is a reason why things are written the way they are, and it is interesting to see these reasons, in my opin
From playlist Quantum Physics by Parth G
Different Facets of Non-Classicality under Non-Hermitian Dynamics by Anirban Pathak
PROGRAM NON-HERMITIAN PHYSICS (ONLINE) ORGANIZERS: Manas Kulkarni (ICTS, India) and Bhabani Prasad Mandal (Banaras Hindu University, India) DATE: 22 March 2021 to 26 March 2021 VENUE: Online Non-Hermitian Systems / Open Quantum Systems are not only of fundamental interest in physics a
From playlist Non-Hermitian Physics (ONLINE)
Quantum Transport, Lecture 11: Quantum Bits
Instructor: Sergey Frolov, University of Pittsburgh, Spring 2013 http://sergeyfrolov.wordpress.com/ Summary: DiVincenzo criteria for hardware design of quantum bits, Rabi, Ramsey, spin echo experiments, candidate quantum bit systems. Quantum Transport course development supported in part b
From playlist Quantum Transport
Dynamics of quantum entanglement by Sthitadhi Roy
Vigyan Adda Dynamics of quantum entanglement Speaker: Sthitadhi Roy (ICTS-TIFR) When: 4:30 pm to 5:30 pm Thursday, 02 February 2023 Where: Online Abstract: Quantum entanglement is one of the central tenets of quantum mechanics. In fact, it can be understood as the notion that distin
From playlist Vigyan Adda
Quantum Matters (ONLINE) by Arindam Ghosh
KAAPI WITH KURIOSITY QUANTUM MATTERS (ONLINE) SPEAKER: Arindam Ghosh (Indian Institute of Science, Bengaluru) WHEN: 4:00 pm to 5:30 pm Sunday, 29 August 2021 WHERE: Livestream via the ICTS YouTube channel Abstract:- Quantum physics governs the world around us, from materials that we u
From playlist Kaapi With Kuriosity (A Monthly Public Lecture Series)
Introduction to Solid State Physics, Lecture 23: Quantum Computing Principles
Upper-level undergraduate course taught at the University of Pittsburgh in the Fall 2015 semester by Sergey Frolov. The course is based on Steven Simon's "Oxford Solid State Basics" textbook. Lectures recorded using Panopto, to see them in Panopto viewer follow this link: https://pitt.host
From playlist Introduction to Solid State Physics
Fang Song - Introduction to quantum computing Part 3 of 3 - IPAM at UCLA
Recorded 26 July 2022. Fang Song of Portland State University presents "Introduction to quantum computing III" at IPAM's Graduate Summer School Post-quantum and Quantum Cryptography. Abstract: This lecture will introduce an alternative formalism of quantum information based on density matr
From playlist 2022 Graduate Summer School on Post-quantum and Quantum Cryptography
Quantum Technologies by Aditi De
KAAPI WITH KURIOSITY QUANTUM TECHNOLOGIES SPEAKER: Aditi De (HRI, Allahabad) WHEN: 3pm to 4pm Sunday, 16 June 2019 WHERE: J. N. Planetarium, Sri T. Chowdaiah Road, High Grounds, Bangalore The quantum theory of nature, formalized in the first few decades of the 20th century, contains e
From playlist Kaapi With Kuriosity (A Monthly Public Lecture Series)
Quantum Correlations in PT-Symmetric Systems by Federico Roccati
PROGRAM NON-HERMITIAN PHYSICS (ONLINE) ORGANIZERS: Manas Kulkarni (ICTS, India) and Bhabani Prasad Mandal (Banaras Hindu University, India) DATE: 22 March 2021 to 26 March 2021 VENUE: Online Non-Hermitian Systems / Open Quantum Systems are not only of fundamental interest in physics a
From playlist Non-Hermitian Physics (ONLINE)
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-H
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Physics of Quantum Annealing - Hamiltonian and Eigenspectrum
In this video we delve into the physics that describe quantum annealing: the Hamiltonian and Eigenspectrum. These are useful pictures of what is going on in the quantum annealing process. Find out more on our website https://www.dwavesys.com/quantum-computing Get one free minute of direct
From playlist Videos I made for D-Wave Systems