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Type-II Symmetry-Protected Topological Dirac Semimetals
Type-II Symmetry-Protected Topological Dirac Semimetals

... Lorentz symmetry whose analog does not exist in the Standard Model. While this state has been dubbed the type-II Weyl semimetal and predicted in a number of materials, its Dirac counterpart has remained elusive. In this paper, we propose the concept of the three-dimensional type-II Dirac fermion and ...
1 The free boson on the sphere, normal ordering, and all that
1 The free boson on the sphere, normal ordering, and all that

... in terms of the chiral fields X(z, z) = X(z) + X(z). a) Recall from the lecture the definition of the normal ordering prescription : . . . : employed above. Give the general relation between normal ordered and radially ordered operators. b) Give the correlator hX(z)X(w)i for the field X(z). Compare ...
A GENERALLY COVARIANT FIELD EQUATION FOR GRAVITATION
A GENERALLY COVARIANT FIELD EQUATION FOR GRAVITATION

Finite-precision measurement does not nullify the Kochen
Finite-precision measurement does not nullify the Kochen

... G. Garcı́a de Polavieja, A. Kent, A. J. López Tarrida, F. Martı́n Maroto, N. D. Mermin, D. A. Meyer, A. Peres, E. Santos, C. Serra, C. Simon, and M. Żukowski for discussions on this topic and acknowledges support from the organizers of the Sixth Benasque Center for Physics, the University of Sevil ...
Generalising Unitary Time Evolution
Generalising Unitary Time Evolution

Abstract - The Budker Group
Abstract - The Budker Group

... Abstract: Quantum Computers and Qbit Cryptography In 1994, Peter Shor—then a researcher at the AT&T Bell Labs—published the paper, “Polynomial-Time Algorithms for Prime Factorization and Discrete Logarithms on a Quantum Computer” describing a quantum algorithm which could be used to efficiently fact ...
REVIEW OF WAVE MECHANICS
REVIEW OF WAVE MECHANICS

... where the wave function  is the same for the whole set of measurements used to obtain the uncertainties. ...
PDF
PDF

... Quantum groupoid (or their dual, weak Hopf coalgebras) and algebroid symmetries figure prominently both in the theory of dynamical deformations of quantum groups (or their dual Hopf algebras) and the quantum Yang–Baxter equations (Etingof et al., 1999, 2001; [?, ?]). On the other hand, one can also ...
Introduction to Quantum Field Theory
Introduction to Quantum Field Theory

Synopsis of Organismic Theory
Synopsis of Organismic Theory

Fermion Doubling in Loop Quantum Gravity - UWSpace
Fermion Doubling in Loop Quantum Gravity - UWSpace

Classical World because of Quantum Physics
Classical World because of Quantum Physics

The Canonical Approach to Quantum Gravity
The Canonical Approach to Quantum Gravity

... then (Σ, ht ) is isometric to the submanifold Σt with the induced metric. Each three-dimensional leaf Σt now corresponds to an instant of time t, where t is so far only a topological time: it faithfully labels instants in a continuous fashion, but no implication is made as to its relation to actual ...
No Slide Title
No Slide Title

... the state vector of the system into one of the two possible states. A second observer (H) may be needed to collapse the state vector of the larger system containing the first observer (G) and the apparatus (A-F). And so on ... ...
QUANTUM COMPUTATION: THE TOPOLOGICAL APPROACH
QUANTUM COMPUTATION: THE TOPOLOGICAL APPROACH

Entanglement and Bell theorem
Entanglement and Bell theorem

... EPR paradox • Before making the measurement on spin 1 (in z direction) the state vector of the system is: • After measurement on particle 1, (for argument’s sake say we measured spin down), the state of particle 2 is: ...
Transport properties of strongly coupled gauge
Transport properties of strongly coupled gauge

The Phase Space and Cotangent Quantisation
The Phase Space and Cotangent Quantisation

... hBi , Di Ai i. ...
Phys. Rev. B.76.193101(2007) - Purdue Physics
Phys. Rev. B.76.193101(2007) - Purdue Physics

... state degeneracy,1 the non-Abelian Berry’s phase,3 and topological entropy,7,10 were introduced to characterize different topological orders. Topological ordered systems have also been designed and studied in the context of quantum computation as a realization of potentially fault-tolerant quantum m ...
The flashes of insight never came for free
The flashes of insight never came for free

De Broglie-Bohm and Feynman Path Integrals
De Broglie-Bohm and Feynman Path Integrals

... wave-like manifestation of light itself. Rather, it should be viewed simply as evidence that photons do not always move in a straight line in empty space. What this amounts to, then, is a failure of Newton’s first law, thereby requiring an entirely new form of dynamics—one that is based on velocity, ...
1.1 Construction of two band models
1.1 Construction of two band models

... Or in a matrix form, the Hamiltonian is written as Quantum anomalous Hall effe Page 1 ...
Studying Quantum Field Theory
Studying Quantum Field Theory

An Invitation to Quantum Complexity Theory
An Invitation to Quantum Complexity Theory

Concepts and Applications of Effective Field Theories: Flavor
Concepts and Applications of Effective Field Theories: Flavor

... • Scale separation, integrating out high-energy modes, low-energy effective Lagrangian ...
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Topological quantum field theory

A topological quantum field theory (or topological field theory or TQFT) is a quantum field theory which computes topological invariants.Although TQFTs were invented by physicists, they are also of mathematical interest, being related to, among other things, knot theory and the theory of four-manifolds in algebraic topology, and to the theory of moduli spaces in algebraic geometry. Donaldson, Jones, Witten, and Kontsevich have all won Fields Medals for work related to topological field theory.In condensed matter physics, topological quantum field theories are the low energy effective theories of topologically ordered states, such as fractional quantum Hall states, string-net condensed states, and other strongly correlated quantum liquid states.
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