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Strong luminescence quantum-efficiency enhancement near prolate
Strong luminescence quantum-efficiency enhancement near prolate

Constructions and Noise Threshold of Topological Subsystem Codes
Constructions and Noise Threshold of Topological Subsystem Codes

Lecture Notes for Physics 229: Quantum Information and Computation
Lecture Notes for Physics 229: Quantum Information and Computation

... Furthermore, in quantum theory, noncommuting observables cannot simultaneously have precisely de ned values (the uncertainty principle), and in fact performing a measurement of one observable A will necessarily in uence the outcome of a subsequent measurement of an observable B , if A and B do not c ...
Steady State Entanglement in Quantum Dot Networks
Steady State Entanglement in Quantum Dot Networks

... efficient quantum simulation[4] shine new light on topics as high Tc superconductivity, quantum magnetism, and quantum phase transitions[5]. It has been shown, theoretically, that quantum computers solve certain types of problems much more efficiently than classical computers.[6] A few examples of t ...
Bohr`s Complementarity and Kant`s Epistemology
Bohr`s Complementarity and Kant`s Epistemology

"Loop Quantum Gravity" (Rovelli)
"Loop Quantum Gravity" (Rovelli)

Centre de Physique Théorique
Centre de Physique Théorique

... CPT personnel The CPT permanent research staff (see the Table on the preceding page which displays a nominative list organized according to the four partner institutions: U2, U1, USTV, and CNRS) is a balanced composition of 51 employees of the laboratory’s four partner institutions: 15 university fa ...
Topological Quantum: Lecture Notes
Topological Quantum: Lecture Notes

Martin Raith - Publikationsserver der Universität Regensburg
Martin Raith - Publikationsserver der Universität Regensburg

Surface Code Quantum Computation on a Defective
Surface Code Quantum Computation on a Defective

... for example, quantum error correction, dynamic decoupling, and decoherence free subspaces. Overall, the study of these methods is called fault tolerant quantum computation (FTQC)[4]. Fully scalable quantum computers are required to solve meaningful problems because small scale quantum computers with ...
Quantum Bianchi I model: an attempt to understand very early
Quantum Bianchi I model: an attempt to understand very early

Research Project Quantum Physics
Research Project Quantum Physics

Universitat Autonoma de Barcelona Facultat de Ciencies, Departament de F sica
Universitat Autonoma de Barcelona Facultat de Ciencies, Departament de F sica

... which mathematically correspond to elements of a two-dimensional Hilbert space, and can be expressed as a superposition of two states, namely j0i and j1i. Thus, the most general states of quantum information are superpositions of strings of qubits. Physically, a qubit corresponds to a single quantum ...
On Zurek`s Derivation of the Born Rule
On Zurek`s Derivation of the Born Rule

Interferometry beyond the Standard Quantum Limit using a Sagnac
Interferometry beyond the Standard Quantum Limit using a Sagnac

... Ü  Now is the right time for an exciting speedmeter experiment. Ü  Let’s have some fun … Ü  If we do not find any showstoppers during our tests than it seems likely that over the next 10 years the Sagnac speedmeter will supersede the Michelson interferometer as state-of-the-art instrument for ult ...
Continuous Variable Quantum Information: Gaussian States and
Continuous Variable Quantum Information: Gaussian States and

Heisenberg (and Schrödinger, and Pauli) on Hidden - Hal-SHS
Heisenberg (and Schrödinger, and Pauli) on Hidden - Hal-SHS

... by the Belgian industrialist and philanthropist Ernest Solvay and organised for the most part through the untiring energy of H. A. Lorentz. The 1927 conference was particularly important in the discussions about the foundational status of quantum mechanics. In particular, de Broglie presented his pi ...
The quantum states of muons in fluorides
The quantum states of muons in fluorides

The solution of the “constant term problem” and the ζ
The solution of the “constant term problem” and the ζ

Abstracts of talks for the history of science conference, One hundred
Abstracts of talks for the history of science conference, One hundred

Wigner`s Dynamical Transition State Theory in
Wigner`s Dynamical Transition State Theory in

... they enable us to show that ‘near’ the saddle the energy surface has what we call the ‘bottleneck property’ which facilitates the construction of an energy dependent dividing surface. This dividing surface has the ‘no-recrossing’ property and the flux across the dividing surface is ‘minimal’ (in a s ...
Time dependent entanglement features, and other quantum information aspects,
Time dependent entanglement features, and other quantum information aspects,

the final version of Abstract Book
the final version of Abstract Book

Experimental test of Heisenberg`s measurement uncertainty relation
Experimental test of Heisenberg`s measurement uncertainty relation

The Causal Set Approach to Quantum Gravity
The Causal Set Approach to Quantum Gravity

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Quantum computing



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 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 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.As of 2015, the development of actual quantum computers is still in its infancy, but experiments have been carried out in which quantum computational operations were executed on a very small number of quantum bits. Both practical and theoretical research continues, and many national governments and military agencies are funding quantum computing research in an effort to develop quantum computers for civilian, business, trade, and national security purposes, such as cryptanalysis.Large-scale quantum computers will be able to solve certain problems much more quickly than any classical computers that use even the best currently known algorithms, like integer factorization using Shor's algorithm or the simulation of quantum many-body systems. There exist quantum algorithms, such as Simon's algorithm, that run faster than any possible probabilistic classical algorithm.Given sufficient computational resources, however, a classical computer could be made to simulate any quantum algorithm, as quantum computation does not violate the Church–Turing thesis.
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