Spin Foam Models of Quantum Spacetime
... States of the gravitational field, i.e. possible 3-geometries, are represented by spin networks, graphs whose edges are labelled with representations of some given group, while their histories, i.e. possible (spacetime) 4-geometries, are spin foams, 2-complexes with faces labelled by representations ...
... States of the gravitational field, i.e. possible 3-geometries, are represented by spin networks, graphs whose edges are labelled with representations of some given group, while their histories, i.e. possible (spacetime) 4-geometries, are spin foams, 2-complexes with faces labelled by representations ...
Superconductor-insulator quantum phase transition
... The current understanding of the superconductor–insulator transition is discussed level by level in a cyclic spiral-like manner. At the first level, physical phenomena and processes are discussed which, while of no formal relevance to the topic of transitions, are important for their implementation ...
... The current understanding of the superconductor–insulator transition is discussed level by level in a cyclic spiral-like manner. At the first level, physical phenomena and processes are discussed which, while of no formal relevance to the topic of transitions, are important for their implementation ...
Part 2a
... Craig Roberts: Emergence of DSEs in Real-World QCD 2A (84) USC School on Non-Perturbative Physics: 26/7-10/8 ...
... Craig Roberts: Emergence of DSEs in Real-World QCD 2A (84) USC School on Non-Perturbative Physics: 26/7-10/8 ...
Comparing field ionization models in simulations of laser
... Atomic units (AU) form a unit system which aims to simplify the equations describing atomic processes on their respective time-, length- or energy scale. At the same time they give a feeling for how the characteristics that are considered relate to atomic scales. They allow to assess if a process is ...
... Atomic units (AU) form a unit system which aims to simplify the equations describing atomic processes on their respective time-, length- or energy scale. At the same time they give a feeling for how the characteristics that are considered relate to atomic scales. They allow to assess if a process is ...
From Principles to Diagrams
... geometric sense. For this space the metric matters and the radius of CP1 turns out to allow identification in terms of Planck length. Gravitational interaction would bring in Planck length as a basic scale in this manner. P T in turn would define the twistor space in which the twistorial lifts of im ...
... geometric sense. For this space the metric matters and the radius of CP1 turns out to allow identification in terms of Planck length. Gravitational interaction would bring in Planck length as a basic scale in this manner. P T in turn would define the twistor space in which the twistorial lifts of im ...
Two-dimensional shapes - Overton Grange Maths KS4
... Tessellations can also be made using more than one shape. Here is a tessellation made from squares and regular octagons. Tessellating is like tiling a flat surface so that there are no gaps between the tiles and so that the tiles do not overlap. ...
... Tessellations can also be made using more than one shape. Here is a tessellation made from squares and regular octagons. Tessellating is like tiling a flat surface so that there are no gaps between the tiles and so that the tiles do not overlap. ...
A CP - Indico
... Electric charge (processes can move charge between quantum fields, but the sum of all charges is constant) Similar: color charge of quarks and gluons, and the weak charge Quark (baryon) and lepton numbers (however, no theory for these, therefore believed to be only approximate asymmetries) evidenc ...
... Electric charge (processes can move charge between quantum fields, but the sum of all charges is constant) Similar: color charge of quarks and gluons, and the weak charge Quark (baryon) and lepton numbers (however, no theory for these, therefore believed to be only approximate asymmetries) evidenc ...
Ph. D. Thesis
... Systems with competing orders are of great interest in condensed matter physics. When two phases have comparable energies, novel interplay effects such can be induced by tuning an appropriate parameter. In this thesis, we study two problems of competing orders - (i) ultracold atom gases with competi ...
... Systems with competing orders are of great interest in condensed matter physics. When two phases have comparable energies, novel interplay effects such can be induced by tuning an appropriate parameter. In this thesis, we study two problems of competing orders - (i) ultracold atom gases with competi ...
Symmetry and symmetry breaking, algebraic approach to - IME-USP
... — except for the fact that the usual concept of space-time as a smooth Lorentz manifold had no meaning and that we have no definite idea as to what should replace it. In the next phase (from about 10−44 or 10−43 seconds to 10−10 seconds after the big bang), the situation is not much better, since we ...
... — except for the fact that the usual concept of space-time as a smooth Lorentz manifold had no meaning and that we have no definite idea as to what should replace it. In the next phase (from about 10−44 or 10−43 seconds to 10−10 seconds after the big bang), the situation is not much better, since we ...
The effects of disorder in strongly interacting quantum systems
... A phase transition is the process by which a thermodynamically large number of interacting particles collectively change their state of matter, e.g. from liquid to solid, liquid to gas, magnetic to non-magnetic or a vast number of other possibilities. Classical phase transitions occur at finite temp ...
... A phase transition is the process by which a thermodynamically large number of interacting particles collectively change their state of matter, e.g. from liquid to solid, liquid to gas, magnetic to non-magnetic or a vast number of other possibilities. Classical phase transitions occur at finite temp ...
Number Fluctuations and Phase Diffusion in a Bose
... the temperature of the gas T are related via N ∝ T 3 . This prevents the onset of Bose-Eintein condensation, because upon lowering the temperature of the system, the amount of photons also decreases. Thus, in order to create a Bose-Einstein condensate of photons, one needs to find a so-called number ...
... the temperature of the gas T are related via N ∝ T 3 . This prevents the onset of Bose-Eintein condensation, because upon lowering the temperature of the system, the amount of photons also decreases. Thus, in order to create a Bose-Einstein condensate of photons, one needs to find a so-called number ...
The Pokorski Group Story III. 1. The Beginnings Among those who
... I think Stefan Pokorski was the first person in Warsaw to appreciate the importance of the charm quark discovery. Soon later, it was becoming increasingly clear that the new field-theoretic picture offered a framework for real progress in particle physics. Over the following years I have found it ty ...
... I think Stefan Pokorski was the first person in Warsaw to appreciate the importance of the charm quark discovery. Soon later, it was becoming increasingly clear that the new field-theoretic picture offered a framework for real progress in particle physics. Over the following years I have found it ty ...
Light-Front Holographic QCD and Emerging
... from Euclidean space lattice computations. Other methods, as for example the DysonSchwinger equations, have also led to many important insights, such as the infrared fixed-point behavior of the strong coupling constant and the pattern of dynamical quark mass generation [9, 10, 11, 12]. In practice, ...
... from Euclidean space lattice computations. Other methods, as for example the DysonSchwinger equations, have also led to many important insights, such as the infrared fixed-point behavior of the strong coupling constant and the pattern of dynamical quark mass generation [9, 10, 11, 12]. In practice, ...
Strongly correlated quantum physics with cold atoms - Max
... thus be used as a tool to study the distribution of entanglement, both from the theoretical and the experimental perspectives. In particular, we raise questions about the amount of many-body entanglement that can be achieved by this procedure, the inherent limitations of using fermions or bosons, an ...
... thus be used as a tool to study the distribution of entanglement, both from the theoretical and the experimental perspectives. In particular, we raise questions about the amount of many-body entanglement that can be achieved by this procedure, the inherent limitations of using fermions or bosons, an ...
Charge degrees of freedom on the kagome lattice
... lattice model exhibits plaquette order in the ground state and also that fractional charges within the model are linearly confined [MSC01]. Subsequently a doped version of the effective model is studied, for the case where exactly one spinless fermion is added or subtracted from the system at 1/3 fi ...
... lattice model exhibits plaquette order in the ground state and also that fractional charges within the model are linearly confined [MSC01]. Subsequently a doped version of the effective model is studied, for the case where exactly one spinless fermion is added or subtracted from the system at 1/3 fi ...
Introduction to Lattice Field Theory
... Example 1: the central limit theorem Example 2: the Ising model Example 3: scalar field theory Bosons on the lattice References Lattice formulation of gauge theories Wilson’s formulation of lattice gauge theory Confinement in strong coupling Gauge theories at high temperature Monte Carlo Simulations ...
... Example 1: the central limit theorem Example 2: the Ising model Example 3: scalar field theory Bosons on the lattice References Lattice formulation of gauge theories Wilson’s formulation of lattice gauge theory Confinement in strong coupling Gauge theories at high temperature Monte Carlo Simulations ...
TIME-REVERSAL INVARIANT TOPOLOGICAL INSULATORS A
... When σxy (m) changes values there is a topological phase transition between insulating phases. If σxy (m) = 0 we say the system is a trivial insulator and if it is non-zero the system is in a topological insulator state. For the lattice Dirac model it is easy to understand the phase diagram by consi ...
... When σxy (m) changes values there is a topological phase transition between insulating phases. If σxy (m) = 0 we say the system is a trivial insulator and if it is non-zero the system is in a topological insulator state. For the lattice Dirac model it is easy to understand the phase diagram by consi ...
Unusual ordered phases of highly frustrated magnets: a review
... Extensive later studies, which are reviewed in34 , have indeed identified classical chiral spin liquid state in a narrow temperature interval TKT < T < TIsing : here TIsing denotes the onset of the chiral long-range order, hκi = 6 0, while the spin (quasi) long-range order emerges only below smaller ...
... Extensive later studies, which are reviewed in34 , have indeed identified classical chiral spin liquid state in a narrow temperature interval TKT < T < TIsing : here TIsing denotes the onset of the chiral long-range order, hκi = 6 0, while the spin (quasi) long-range order emerges only below smaller ...
8 congruence, symmetry and similarity
... Janine now says, ‘It has two lines of symmetry.’ c Is there now enough information to know what the quadrilateral is? Give reasons for your answer. Janine now says, ‘It has sides that are not all the same length.’ d What quadrilateral is Janine thinking of? ...
... Janine now says, ‘It has two lines of symmetry.’ c Is there now enough information to know what the quadrilateral is? Give reasons for your answer. Janine now says, ‘It has sides that are not all the same length.’ d What quadrilateral is Janine thinking of? ...
The Casimir Effect: Some Aspects
... spent by a light signal to travel from one atom to the other is of the order (or greater) than atomic characteristic times (r/c ≥ 1/ωMan , where ωmn are atomic transition frequencies). Though this conjecture seemed to be very plausible, a rigorous demonstration was in order. Further, the precise exp ...
... spent by a light signal to travel from one atom to the other is of the order (or greater) than atomic characteristic times (r/c ≥ 1/ωMan , where ωmn are atomic transition frequencies). Though this conjecture seemed to be very plausible, a rigorous demonstration was in order. Further, the precise exp ...
Unusual ordered phases of highly frustrated magnets: a review
... Extensive later studies, which are reviewed in34 , have indeed identified classical chiral spin liquid state in a narrow temperature interval TKT < T < TIsing : here TIsing denotes the onset of the chiral long-range order, hκi = 6 0, while the spin (quasi) long-range order emerges only below smaller ...
... Extensive later studies, which are reviewed in34 , have indeed identified classical chiral spin liquid state in a narrow temperature interval TKT < T < TIsing : here TIsing denotes the onset of the chiral long-range order, hκi = 6 0, while the spin (quasi) long-range order emerges only below smaller ...
Spinning Strings and Integrable Spin Chains in the AdS/CFT Correspondence Jan Plefka
... strongly hinders any dynamical tests (or even a proof) of the AdS/CFT conjecture in regimes that are not protected by the large amount of symmetry in the problem. This situation has profoundly changed since 2002 by performing studies of the correspondence in novel limits where quantum numbers (such ...
... strongly hinders any dynamical tests (or even a proof) of the AdS/CFT conjecture in regimes that are not protected by the large amount of symmetry in the problem. This situation has profoundly changed since 2002 by performing studies of the correspondence in novel limits where quantum numbers (such ...
The Oscillating Neutrino
... (and their respective antiparticles). The quarks are the building blocks that have fractional electric charge and interact primarily through the strong nuclear force, also called the color force. Color binds quarks together to form the proton, the neutron, all nuclei, and all the other hadrons (stro ...
... (and their respective antiparticles). The quarks are the building blocks that have fractional electric charge and interact primarily through the strong nuclear force, also called the color force. Color binds quarks together to form the proton, the neutron, all nuclei, and all the other hadrons (stro ...
Properties and detection of spin nematic order in strongly correlated
... magnitude S. As seen explicitly from (3), the function f is parity-symmetric, f(r) = f(−r). As will be shown below, f is dominated by the short-range antiferromagnetic correlations between spins, and therefore has a large contribution at the wave vector (π, π). By definition, we choose this contribu ...
... magnitude S. As seen explicitly from (3), the function f is parity-symmetric, f(r) = f(−r). As will be shown below, f is dominated by the short-range antiferromagnetic correlations between spins, and therefore has a large contribution at the wave vector (π, π). By definition, we choose this contribu ...
Preprint
... What does a trapped Bose-Einstein condensate look like? More precisely, how does it interact with light, and does this differ fundamentally from what one would naively expect from a similar collection of very cold atoms? In the early 1990s, before Bose-Einstein condensation was realized in atomic ga ...
... What does a trapped Bose-Einstein condensate look like? More precisely, how does it interact with light, and does this differ fundamentally from what one would naively expect from a similar collection of very cold atoms? In the early 1990s, before Bose-Einstein condensation was realized in atomic ga ...