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ABSTRACT – Condensed Matter Physics [ORIGINAL]
ABSTRACT – Condensed Matter Physics [ORIGINAL]

... The quantum spin Hall state of matter, which is related to the integer quantum Hall state, does not require the application of a large magnetic field. It is a state of matter that is proposed to exist in special, two-dimensional semiconductors with spin-orbit coupling. In addition, as the quantum sp ...
Feedback Control in Quantum Systems
Feedback Control in Quantum Systems

Quantum Communication: A real Enigma
Quantum Communication: A real Enigma

Witnessing quantumness of a system by observing only its classical
Witnessing quantumness of a system by observing only its classical

LOSS OF COHERENCE IN GATE-CONTROLLED QUBIT SYSTEMS
LOSS OF COHERENCE IN GATE-CONTROLLED QUBIT SYSTEMS

... We review the current state-of-the-art in the development of superconducting single-photon detectors and demonstrate their advantages over conventional semiconductor avalanche photodiodes, in terms ultrafast and very efficient counting capabilities of both visible-light and infrared photons. Superco ...
Quantum Computation and Quantum Information” by Michael
Quantum Computation and Quantum Information” by Michael

... fully grasp more advanced topics. It is for instance not quite clear for some time, for the unversed reader, that quantum computation and quantum information theory is a model meant to describe the phenomena observed in e.g. the Stern-Gerlach experiment. The chapters are logically written and thorou ...
PDF
PDF

... atoms to photons, transported through space, and moved back from photons to atoms, is a difficult one. Exactly because quantum information provides additional opportunities for storing and processing information, it also provides additional opportunities for errors, loss, and the corruption of that ...
ACAT2005_Severyanov
ACAT2005_Severyanov

Presentazione di PowerPoint
Presentazione di PowerPoint

QUANTUM OR NON-QUANTUM, CLASSICAL OR NON
QUANTUM OR NON-QUANTUM, CLASSICAL OR NON

... does not imply that the mixed state is entangled The system can be very much « non-classical» "quantum discord" is one possible quantity to characterize its non-classicality ...
Simulation programs for teaching quantum mechanics
Simulation programs for teaching quantum mechanics

Lecture 6: The Fractional Quantum Hall Effect Fractional quantum
Lecture 6: The Fractional Quantum Hall Effect Fractional quantum

... by Laughlin [4-61. The wave function turns out to be exact for short range interactions and still an excellent approximation for the case of Coulombic interaction. This is corroborated by many sophisticated numerical few-particle calculations. This approach has been very successful in explaining the ...
Multilinear Formulas and Skepticism of Quantum
Multilinear Formulas and Skepticism of Quantum

... Challenge for NMR Experimenters • Create a uniform superposition over a n “generic” coset of 2 (n9) or even better, Clifford group state • Worthwhile even if you don’t demonstrate error correction • We’ll overlook that it’s really (1-10-5)I/512 + 10-5|CC| New test of QM: are all states tree stat ...
Quantum Information and Quantum Computation
Quantum Information and Quantum Computation

... quantum superposition of circulating supercurrents, and have designed devices in which such systems function as quantum bits in a quantum computer. We are currently collaborating with Delft and NEC to investigate mechanisms of errors and decoherence in superconducting quantum bits and are designing ...
TT 35: Low-Dimensional Systems: 2D - Theory - DPG
TT 35: Low-Dimensional Systems: 2D - Theory - DPG

Quantum Logic and Quantum gates with Photons
Quantum Logic and Quantum gates with Photons

Exponential complexity and ontological theories of quantum
Exponential complexity and ontological theories of quantum

Document
Document

Quantum gravity and consciousness, the most
Quantum gravity and consciousness, the most

... Quantum computers achieved mature age, and so do artificial intelligence and robotics. This helps at calculations and experiments in physics. ...
lecture31
lecture31

... There are four different quantum numbers needed to specify the state of an electron in an atom: 1) Principal quantum number n gives the total energy: ...
Document
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... numbers also result in small energy differences • Pauli exclusion principle: no two electrons in the same atom can be in the same quantum state • Electrons are grouped into shells and subshells • Periodic table reflects shell structure •Atoms with the same number of electrons in their outer shells h ...
lecture31
lecture31

... numbers also result in small energy differences • Pauli exclusion principle: no two electrons in the same atom can be in the same quantum state • Electrons are grouped into shells and subshells • Periodic table reflects shell structure •Atoms with the same number of electrons in their outer shells h ...
Canonical quantum gravity
Canonical quantum gravity

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NP Complexity
NP Complexity

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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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