- published: 17 Jun 2013
- views: 2098266
In quantum computing, a qubit (/ˈkjuːbɪt/) or quantum bit (sometimes qbit) is a unit of quantum information—the quantum analogue of the classical bit. A qubit is a two-state quantum-mechanical system, such as the polarization of a single photon: here the two states are vertical polarization and horizontal polarization. In a classical system, a bit would have to be in one state or the other. However quantum mechanics allows the qubit to be in a superposition of both states at the same time, a property which is fundamental to quantum computing.
The concept of the qubit was unknowingly introduced by Stephen Wiesner in 1983, in his proposal for quantum money, which he had tried to publish for over a decade.
The coining of the term "qubit" is attributed to Benjamin Schumacher. In the acknowledgments of his paper, Schumacher states that the term qubit was invented in jest due to its phonological resemblance with an ancient unit of length called cubit, during a conversation with William Wootters. The paper describes a way of compressing states emitted by a quantum source of information so that they require fewer physical resources to store. This procedure is now known as Schumacher compression.
Deoxyribonucleic acid (i/diˈɒksiˌraɪboʊnjʊˌkliːɪk, -ˌkleɪɪk/;DNA) is a molecule that carries most of the genetic instructions used in the development, functioning and reproduction of all known living organisms and many viruses. DNA is a nucleic acid; alongside proteins and carbohydrates, nucleic acids compose the three major macromolecules essential for all known forms of life. Most DNA molecules consist of two biopolymer strands coiled around each other to form a double helix. The two DNA strands are known as polynucleotides since they are composed of simpler units called nucleotides. Each nucleotide is composed of a nitrogen-containing nucleobase—either cytosine (C), guanine (G), adenine (A), or thymine (T)—as well as a monosaccharide sugar called deoxyribose and a phosphate group. The nucleotides are joined to one another in a chain by covalent bonds between the sugar of one nucleotide and the phosphate of the next, resulting in an alternating sugar-phosphate backbone. According to base pairing rules (A with T, and C with G), hydrogen bonds bind the nitrogenous bases of the two separate polynucleotide strands to make double-stranded DNA. The total amount of related DNA base pairs on Earth is estimated at 5.0 x 1037, and weighs 50 billion tonnes. In comparison, the total mass of the biosphere has been estimated to be as much as 4 TtC (trillion tons of carbon).
Quantum computing studies theoretical computation systems (quantum computers) that make direct use of quantum-mechanical phenomena, such as superposition and entanglement, to perform operations on data. Quantum computers are different from digital electronic computers based on transistors. Whereas digital computers require data to be encoded into binary digits (bits), each of which is always in one of two definite states (0 or 1), quantum computation uses quantum bits (qubits), which can be in superpositions of states. A quantum Turing machine is a theoretical model of such a computer, and is also known as the universal quantum computer. Quantum computers share theoretical similarities with non-deterministic and probabilistic computers. The field of quantum computing was initiated by the work of Paul Benioff and Yuri Manin in 1980,Richard Feynman in 1982, and David Deutsch in 1985. A quantum computer with spins as quantum bits was also formulated for use as a quantum space–time in 1968.
For more on spin, check out: http://youtu.be/v1_-LsQLwkA This video was supported by TechNYou: http://bit.ly/19bBX5G A quantum computer works in a totally different way from a classical computer. Quantum bits or 'qubits' can exist in a superposition state of both zero and one simultaneously. This means that a set of two qubits can be in a superposition of four states, which therefore require four numbers to uniquely identify the state. So the amount of information stored in N qubits is two to the power of N classical bits. Thank you to Andrea Morello and UNSW. For more info, check out: http://bit.ly/17wZ7lt
What is computation? ...and what is quantum computation? CORRECTIONS: 8:01 The Pauli-X gate does NOT flip the direction of the qubit. It rotates it 180 degrees about the x-axis, where the x-axis is pointing out of the screen. 9:41 This graph is wrong. The Shor curve should be below the Classical curve since it takes LESS time. Sources: Quantum Computing for Computer Scientists http://books.google.ca/books/about/Quantum_Computing_for_Computer_Scientist.html?id=eTT0FsHA5DAC Quantum Computers: Fundamentals, Application and Implementation www.tngtech.com/assets/btd/btd6/BenjaminFeldman_BTD6.pptx Quantum Computation Roadmap qist.lanl.gov/qcomp_map.shtml WATERLOO NEWS https://uwaterloo.ca/news/news/experiment-opens-door-multi-party-quantum-communication Engineer Guy http://www.engineerg...
Transistors to Quantum Computer Playlist: This episode supported by audible.com: http://bit.ly/ZJ5Q6z Veritasium t-shirts! http://dft.ba/-vetshirt Silicon-28 sphere: http://bit.ly/10J1G2o We have looked at how a transistor works, the fundamental unit of classical computers, and how a quantum computer works in theory, taking advantage of quantum superposition to hold exponentially more information than classical computers. Now we look at the practical side of making a quantum bit, or qubit. How do you put it in a state where it is stable? How do you read and write information on it? These processes are described for a solid state qubit - a phosphorous atom in a silicon crystal substrate. Both the electron and the nucleus of the phosphorous atom can be used as qubits. Thanks to A/Prof. And...
Introduces the most basic type of quantum mechanical system, the qubit. Part of a series on "Quantum computing for the determined". The full series is at: http://www.youtube.com/user/mnielsencourses?feature=mhum#p/c/1826E60FD05B44E4
To Learn More visit, http://www.lifetechnologies.com/qubit The Qubit® 2.0 Fluorometer quantitates DNA, RNA, and protein with unprecedented accuracy, sensitivity, and simplicity. It is designed for molecular biology labs that work with: • Precious samples that are rare or difficult to process • Applications requiring precise measurement such as real-time PCR The Qubit® 2.0 Fluorometer utilizes specifically designed fluorometric technology using Molecular Probes® dyes. These fluorescent dyes emit signals ONLY when bound to specific target molecules, even in the presence of free nucleotides or degraded nucleic acids. Qubit® fluorometric quantitation provides the most specific and sensitive DNA and RNA quantitation available, even at low concentrations. Transcript Dr. Amr Abid: It's hard...
L'informatique occupe une place grandissante dans nos sociétés, bénéficiant du développement des ordinateurs qui permettent la manipulation d'informations élémentaires, que l'on nomme des « bits », en vue de la réalisation de toutes sortes de tâches automatiques. Si la notion de « bit » est aujourd'hui très communément comprise, celle de « qubit », son équivalent quantique, demeure largement méconnue. C'est elle, pourtant, qui est au cœur de ce que l'on nomme l'informatique quantique, ainsi que de la cryptographie quantique, dont la maîtrise représente un enjeu technologique, économique et stratégique considérable. Mais qu'est-ce qui fait la différence entre le bit ordinaire, régi par les lois de la Physique classique, et le qubit, ancré dans la réalité quantique de notre monde physique ...
Engineers from UNSW’s Centre for Quantum Computation & Communication Technology (CQC2T) have created a new quantum bit which remains in a stable superposition for 10 times longer than previously achieved, dramatically expanding the time during which calculations could be performed in a future silicon quantum computer. MORE INFO: http://newsroom.unsw.edu.au/news/science-tech/quantum-computers-10-fold-boost-stability-achieved TRANSCRIPT OF STORY AUDIO Arne Laucht: “Our team has created a new quantum bit, or qubit, by merging the spin of a single atom in silicon with a strong oscillating electromagnetic field. It's called a ‘dressed qubit’ – a qubit dressed by the field. The dressed qubit retains quantum information much longer than the standard spin qubit. That is a big advantage for us when...
In this video I show you how to manipulate a single quantum bit (or qubit) using the Not and Hadamard gates.
Introducing quantum theory, the quantum theory of computation, physical systems, observations, and the simplest quantum physical system, the qubit.
For more on spin, check out: http://youtu.be/v1_-LsQLwkA This video was supported by TechNYou: http://bit.ly/19bBX5G A quantum computer works in a totally different way from a classical computer. Quantum bits or 'qubits' can exist in a superposition state of both zero and one simultaneously. This means that a set of two qubits can be in a superposition of four states, which therefore require four numbers to uniquely identify the state. So the amount of information stored in N qubits is two to the power of N classical bits. Thank you to Andrea Morello and UNSW. For more info, check out: http://bit.ly/17wZ7lt
What is computation? ...and what is quantum computation? CORRECTIONS: 8:01 The Pauli-X gate does NOT flip the direction of the qubit. It rotates it 180 degrees about the x-axis, where the x-axis is pointing out of the screen. 9:41 This graph is wrong. The Shor curve should be below the Classical curve since it takes LESS time. Sources: Quantum Computing for Computer Scientists http://books.google.ca/books/about/Quantum_Computing_for_Computer_Scientist.html?id=eTT0FsHA5DAC Quantum Computers: Fundamentals, Application and Implementation www.tngtech.com/assets/btd/btd6/BenjaminFeldman_BTD6.pptx Quantum Computation Roadmap qist.lanl.gov/qcomp_map.shtml WATERLOO NEWS https://uwaterloo.ca/news/news/experiment-opens-door-multi-party-quantum-communication Engineer Guy http://www.engineerg...
Transistors to Quantum Computer Playlist: This episode supported by audible.com: http://bit.ly/ZJ5Q6z Veritasium t-shirts! http://dft.ba/-vetshirt Silicon-28 sphere: http://bit.ly/10J1G2o We have looked at how a transistor works, the fundamental unit of classical computers, and how a quantum computer works in theory, taking advantage of quantum superposition to hold exponentially more information than classical computers. Now we look at the practical side of making a quantum bit, or qubit. How do you put it in a state where it is stable? How do you read and write information on it? These processes are described for a solid state qubit - a phosphorous atom in a silicon crystal substrate. Both the electron and the nucleus of the phosphorous atom can be used as qubits. Thanks to A/Prof. And...
Introduces the most basic type of quantum mechanical system, the qubit. Part of a series on "Quantum computing for the determined". The full series is at: http://www.youtube.com/user/mnielsencourses?feature=mhum#p/c/1826E60FD05B44E4
To Learn More visit, http://www.lifetechnologies.com/qubit The Qubit® 2.0 Fluorometer quantitates DNA, RNA, and protein with unprecedented accuracy, sensitivity, and simplicity. It is designed for molecular biology labs that work with: • Precious samples that are rare or difficult to process • Applications requiring precise measurement such as real-time PCR The Qubit® 2.0 Fluorometer utilizes specifically designed fluorometric technology using Molecular Probes® dyes. These fluorescent dyes emit signals ONLY when bound to specific target molecules, even in the presence of free nucleotides or degraded nucleic acids. Qubit® fluorometric quantitation provides the most specific and sensitive DNA and RNA quantitation available, even at low concentrations. Transcript Dr. Amr Abid: It's hard...
L'informatique occupe une place grandissante dans nos sociétés, bénéficiant du développement des ordinateurs qui permettent la manipulation d'informations élémentaires, que l'on nomme des « bits », en vue de la réalisation de toutes sortes de tâches automatiques. Si la notion de « bit » est aujourd'hui très communément comprise, celle de « qubit », son équivalent quantique, demeure largement méconnue. C'est elle, pourtant, qui est au cœur de ce que l'on nomme l'informatique quantique, ainsi que de la cryptographie quantique, dont la maîtrise représente un enjeu technologique, économique et stratégique considérable. Mais qu'est-ce qui fait la différence entre le bit ordinaire, régi par les lois de la Physique classique, et le qubit, ancré dans la réalité quantique de notre monde physique ...
Engineers from UNSW’s Centre for Quantum Computation & Communication Technology (CQC2T) have created a new quantum bit which remains in a stable superposition for 10 times longer than previously achieved, dramatically expanding the time during which calculations could be performed in a future silicon quantum computer. MORE INFO: http://newsroom.unsw.edu.au/news/science-tech/quantum-computers-10-fold-boost-stability-achieved TRANSCRIPT OF STORY AUDIO Arne Laucht: “Our team has created a new quantum bit, or qubit, by merging the spin of a single atom in silicon with a strong oscillating electromagnetic field. It's called a ‘dressed qubit’ – a qubit dressed by the field. The dressed qubit retains quantum information much longer than the standard spin qubit. That is a big advantage for us when...
In this video I show you how to manipulate a single quantum bit (or qubit) using the Not and Hadamard gates.
Introducing quantum theory, the quantum theory of computation, physical systems, observations, and the simplest quantum physical system, the qubit.
Entanglement and the Measurement of One Qubit of a Two-Qubit State
Quantum Computation 1 The Qubit by David Deutsch
Talk about quantum computing in general and about the experimental implementation of Spin Qubits specifically.
Superconducting flux qubits – prospects for relativistic quantum information experiments Adrian Lupascu of the Institute for Quamtum Computing presents recent experiments in which flux qubits are strongly coupled to electromagnetic fields. He also discusses the prospects of these systems for relativistic quantum information experiments.
Introducing quantum theory, the quantum theory of computation, physical systems, observations, and the simplest quantum physical system, the qubit.
Introducing quantum theory, the quantum theory of computation, physical systems, observations, and the simplest quantum physical system, the qubit.
Intro:
Oh lala bagladash
New cupid
Let me see you spin the bottle
Chorus:
Round and round and round she goes
Where she stops nobody knows
Soon as she gets on the floor (oh)
Round and round and round she goes
Where she stops nobody knows
Soon as she gets on the floor (oh)
Ohhhh Ohhhh Ohhhh
Where she stops nobody knows
Ohhhh Ohhhh Ohhhh
Soon as she gets on the floor
Verse 1:
When she walks she leaves a trail of fire (fire)
Eternally burnin my soul (oh)
Fulfillin my every desire (desire)
How she does it nobody knows
From the side so fine
From the front she is a dime
And who from behind (Spin that thang around the clock)
Baby take your time
The way you make it wind
And when you get to me then (stop!)
I Love to see your body movin' (yeah)
Twistin and turnin to the music (yeah)
The way you take it to the floor
You make me say ohh oh oh oh ohhhhhh
(Oooohhh Babe)
Chorus:
Round and round and round she goes
Where she stops nobody knows
Soon as she gets on the floor (oh)
Let me see you spin the bottle
Round and round and round she goes
Where she stops nobody knows
Soon as she gets on the floor (oh)
Let me see you spin the bottle
Ohhhh Ohhhh Ohhhh
Where she stops nobody knows
Ohhhh Ohhhh Ohhhh
Soon as she gets on the floor
Verse 2:
Everyone in here is a magnet
So attractive
Cause she stacked
No it's not fiction it's a fact
Body of a goddess
Gotta be the hottest
You gotta swing my way so i can give you some of this (this)
And a little bit of that (that)
Turn around and catch a glimpse (glimpse)
Your really workin that
You make around through the club
Bouncin and shakin
Baby what's up
Let me see you make it
I Love to see your body movin' (Yeah)
Twistin and turnin to the music (yeah)
The way you take it to the floor
You make me say ohh oh oh oh ohhhhhh
(Oooohhh Babe)
Chorus:
Round and round and round she goes
Where she stops nobody knows
Soon as she gets on the floor (oh)
Let me see you spin the bottle
Round and round and round she goes
Where she stops nobody knows
Soon as she gets on the floor (oh)
Let me see you spin the bottle
Ohhhh Ohhhh Ohhhh
Where she stops nobody knows
Ohhhh Ohhhh Ohhhh
Soon as she gets on the floor
Verse 3: [Shorty the Kid]
Baby girl so hot hot
Let me hit my spot spot
Look at how she go whoa
Run around and drop
Let me see you spin that bottle
Cause you look just like a model
Seein all your chicks
Can you work this stick
Or do you just switch to auto
I can ?????
Let a young cat handle you
Spin it till you tired
Let your fire just like a candle ohh
Look at how she do it
Got my mind on stupid
I don't know what's up
I think i'm in love like i'm hit by cupid
Chorus:
Round and round and round she goes
Where she stops nobody knows
Soon as she gets on the floor (oh)
Let me see you spin the bottle
Round and round and round she goes
Where she stops nobody knows
Soon as she gets on the floor (oh)
Let me see you spin the bottle
Ohhhh Ohhhh Ohhhh
Where she stops nobody knows
Ohhhh Ohhhh Ohhhh