Introduction to Quantum Computing (2010) (e-book)
... group algebra. A general theory of anyons and topological quantum order is lacking. 2) It is also desirable to formulate and prove some theorem about existence and the number of local degrees of freedom. (It seems that the local degrees of freedom are a sign that anyons arise from a system with no s ...
... group algebra. A general theory of anyons and topological quantum order is lacking. 2) It is also desirable to formulate and prove some theorem about existence and the number of local degrees of freedom. (It seems that the local degrees of freedom are a sign that anyons arise from a system with no s ...
X 5 Berry phase in solid state physics
... One possible way to calibrate the difference between two vectors at different locations is as follows: Starting from point 1, the ant can carry the vector around in such a way that it makes a fixed relative angle with the tangent vector along a path between 1 and 2 (see Fig. 1a). Such a vector is sa ...
... One possible way to calibrate the difference between two vectors at different locations is as follows: Starting from point 1, the ant can carry the vector around in such a way that it makes a fixed relative angle with the tangent vector along a path between 1 and 2 (see Fig. 1a). Such a vector is sa ...
Time-Reversal-Symmetry-Broken Quantum Spin Hall Effect
... bands and a pair of gapless spin-filtered edge states on the boundary. The currents carried by the edge states are dissipationless due to the protection of time-reversal (TR) symmetry and immune to nonmagnetic scattering. The QSH effect was first predicted in two-dimensional (2D) models [2,3]. It wa ...
... bands and a pair of gapless spin-filtered edge states on the boundary. The currents carried by the edge states are dissipationless due to the protection of time-reversal (TR) symmetry and immune to nonmagnetic scattering. The QSH effect was first predicted in two-dimensional (2D) models [2,3]. It wa ...
Quantum Field Theory, its Concepts Viewed from a Semiotic
... we return in greater detail to the central question: in which way do particles, i.e. the objects observed experimentally, emerge in the theory from the quantised fields, i.e. from the theoretical building blocks? The resulting rather complex answer manifests, to which extend the theory copes with th ...
... we return in greater detail to the central question: in which way do particles, i.e. the objects observed experimentally, emerge in the theory from the quantised fields, i.e. from the theoretical building blocks? The resulting rather complex answer manifests, to which extend the theory copes with th ...
StMalloQuantumComputing
... Quantum Latin word meaning “some quantity”. In physics used with the same meaning as the word discrete in mathematics, i.e., some quantity or variable that can take only sharply defined values as opposed to a continuously varying quantity. The concepts continuum and continuous are known from geome ...
... Quantum Latin word meaning “some quantity”. In physics used with the same meaning as the word discrete in mathematics, i.e., some quantity or variable that can take only sharply defined values as opposed to a continuously varying quantity. The concepts continuum and continuous are known from geome ...
Quantum computers - Quantum Engineering Group
... In the standard picture of quantum computing, this criterion (DiVincenzo’s fourth) requires a system to have available a universal set of quantum logic gates. In the case of qubits, it is sufficient to have available nearly ‘analogue’ single-qubit gates (for example, arbitrary rotations of a spin-qu ...
... In the standard picture of quantum computing, this criterion (DiVincenzo’s fourth) requires a system to have available a universal set of quantum logic gates. In the case of qubits, it is sufficient to have available nearly ‘analogue’ single-qubit gates (for example, arbitrary rotations of a spin-qu ...
Electron spin echo studies
... display semiconducting or semimetallic character.3,4 Thermally excited electrons in graphene behave like relativistic particles called massless Dirac fermions and travel at very high speed of 106 m / s. Thus they conduct electricity with virtually no resistance and move as if they were light waves.5 ...
... display semiconducting or semimetallic character.3,4 Thermally excited electrons in graphene behave like relativistic particles called massless Dirac fermions and travel at very high speed of 106 m / s. Thus they conduct electricity with virtually no resistance and move as if they were light waves.5 ...
Simulating physics with computers
... computer with arbitrary interconnections throughout the entire thing. Now, what kind of physics are we going to imitate? First, I am going to describe the possibility of simulating physics in the classical approximation, a thing which is usuaUy described by local differential equations. But the phys ...
... computer with arbitrary interconnections throughout the entire thing. Now, what kind of physics are we going to imitate? First, I am going to describe the possibility of simulating physics in the classical approximation, a thing which is usuaUy described by local differential equations. But the phys ...
The interpretation of the Einstein-Rupp experiments and their
... something about this from observations of the visibility of interference fringes at various path differences. Namely, the following is to be taken into consideration: Let us assume that a screen S is hit by the two wave trains 1 and 2 (that originated at the same emission event), with front and rear ...
... something about this from observations of the visibility of interference fringes at various path differences. Namely, the following is to be taken into consideration: Let us assume that a screen S is hit by the two wave trains 1 and 2 (that originated at the same emission event), with front and rear ...
Einstein`s contributions to atomic physics
... basis for his kinetic theory of gases. Maxwell’s formulation of statistical mechanics marked a turning point in physics, since (in contrast to Laplacian determinism) it presupposed the operation of chance in nature. Thus, in this case, the ‘exact sciences’ borrowed from the ‘social sciences’. It sho ...
... basis for his kinetic theory of gases. Maxwell’s formulation of statistical mechanics marked a turning point in physics, since (in contrast to Laplacian determinism) it presupposed the operation of chance in nature. Thus, in this case, the ‘exact sciences’ borrowed from the ‘social sciences’. It sho ...
Demonstration of Entanglement of Electrostatically Coupled Singlet-Triplet Qubits M. D. Shulman
... quantum state, we evaluate another measure of entanglement, the Bell state fidelity, F ≡ 〈Ψent |ρ|Ψent 〉. This may be interpreted as the probability of measuring our two-qubit state in desired |Ψent 〉. Additionally, for all non-entangled states one can show that F ≤ 0.5 [23, 24]. In terms of the Pau ...
... quantum state, we evaluate another measure of entanglement, the Bell state fidelity, F ≡ 〈Ψent |ρ|Ψent 〉. This may be interpreted as the probability of measuring our two-qubit state in desired |Ψent 〉. Additionally, for all non-entangled states one can show that F ≤ 0.5 [23, 24]. In terms of the Pau ...
Entanglement Theory and the Second Law of Thermodynamics
... This will turn out to be the central quantity in this work as it will emerge as the unique entanglement quantifier. Operations – The correct choice of the set of operations employed is crucial for establishing reversibility in entanglement manipulation. To motivate this choice it is instructive to n ...
... This will turn out to be the central quantity in this work as it will emerge as the unique entanglement quantifier. Operations – The correct choice of the set of operations employed is crucial for establishing reversibility in entanglement manipulation. To motivate this choice it is instructive to n ...
Bell's theorem
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Bell's theorem is a ‘no-go theorem’ that draws an important distinction between quantum mechanics (QM) and the world as described by classical mechanics. This theorem is named after John Stewart Bell.In its simplest form, Bell's theorem states:Cornell solid-state physicist David Mermin has described the appraisals of the importance of Bell's theorem in the physics community as ranging from ""indifference"" to ""wild extravagance"". Lawrence Berkeley particle physicist Henry Stapp declared: ""Bell's theorem is the most profound discovery of science.""Bell's theorem rules out local hidden variables as a viable explanation of quantum mechanics (though it still leaves the door open for non-local hidden variables). Bell concluded:Bell summarized one of the least popular ways to address the theorem, superdeterminism, in a 1985 BBC Radio interview: