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Physik-Department Technische Universität München
Physik-Department Technische Universität München

Chapter 3: Quantum Computing
Chapter 3: Quantum Computing

... entangled states can be compressed to fewer qubits. This quantum compression could have important applications in practice, where the number of usable qubits is very limited. Schumacher [101] considered compression and decompression of a noiseless source of n quantum bits (qubits), each sampled inde ...
Quantum Information Processing: Algorithms, Technologies and
Quantum Information Processing: Algorithms, Technologies and

... for transmission of classical information, still in certain cases entangled states can be compressed to fewer qubits. This quantum compression could have important applications in practice, where the number of usable qubits is very limited. Schumacher [101] considered compression and decompression o ...
Entanglement in many body quantum systems Arnau Riera Graells
Entanglement in many body quantum systems Arnau Riera Graells

A WYSIWYG Simulation Tool for Investigating the Circuit Model of
A WYSIWYG Simulation Tool for Investigating the Circuit Model of

Research Proposal for a Quantum Computer Programming
Research Proposal for a Quantum Computer Programming

Quantum Circuits Engineering: Efficient Simulation and
Quantum Circuits Engineering: Efficient Simulation and

Resource Theory of Coherence
Resource Theory of Coherence

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 ...
An Unshunted Comparator as a Device for Quantum Measurements
An Unshunted Comparator as a Device for Quantum Measurements

Quantum Information Processing - wolfgang
Quantum Information Processing - wolfgang

quant-ph/0608013 PDF
quant-ph/0608013 PDF

... From the seminal ideas of Feynman [1] and until now, quantum information and computation [2] has been a rapidly evolving field. While at the beginning, physicists looked at quantum mechanics as a theoretical framework to describe the fundamental processes that take place in Nature, it was during the ...
Disorder and entropy rate in discrete time quantum walks
Disorder and entropy rate in discrete time quantum walks

- Quantum Optics and Spectroscopy
- Quantum Optics and Spectroscopy

The Second Law of Quantum Complexity
The Second Law of Quantum Complexity

Entanglement in periodically driven quantum systems
Entanglement in periodically driven quantum systems

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

Entanglement or Separability
Entanglement or Separability

Q ua nt um
Q ua nt um

Time dependent entanglement features, and other quantum information aspects,
Time dependent entanglement features, and other quantum information aspects,

Information measures, entanglement and quantum evolution Claudia Zander
Information measures, entanglement and quantum evolution Claudia Zander

Quantum information processing beyond ten ion
Quantum information processing beyond ten ion

Entanglement Entropy in a Triangular Billiard
Entanglement Entropy in a Triangular Billiard

Computational Methods for Simulating Quantum Computers
Computational Methods for Simulating Quantum Computers

Fault-tolerant quantum repeater with atomic ensembles and linear
Fault-tolerant quantum repeater with atomic ensembles and linear

1 2 3 4 5 ... 22 >

Algorithmic cooling

Algorithmic cooling is a phenomenon in quantum computation in which the processing of certain types of computation results in negative entropy and thus a cooling effect.The phenomenon is a result of the connection between thermodynamics and information theory. In so far as information is encoded in physical systems it is subject to the laws of thermodynamics.Certain processes within computation require a change in entropy within the computing system. As data must be stored as some kind of ordered structure (like a localized charge in a capacitor) so the erasure of data by destroying this order must involve an increase in disorder, or entropy. This means that the erasure of data releases heat. This is Landauer's principle.Reversible computing or Adiabatic computing is a theoretical type of computing in which data is never erased, it just changes state or is marked to be ignored. In theory such a system would be able to ""hide"" data without releasing heat.In the case of quantum entangled data, or qubits, it is possible for a computation to result in negative entropy, actually transferring heat out of the computational system, and so cooling it.
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