A blueprint for building a quantum computer
... rent classical capabilities, for certain systems designed to solve certain problems. As we begin to design larger quantum computers, it must be recognized that large systems are not simply larger versions of small systems. The conceptual stack of subfields that must all contribute to a scalable, rea ...
... rent classical capabilities, for certain systems designed to solve certain problems. As we begin to design larger quantum computers, it must be recognized that large systems are not simply larger versions of small systems. The conceptual stack of subfields that must all contribute to a scalable, rea ...
Disorder-induced order with ultra-cold atoms
... consider the full microscopic description of a system, it is often enough to resort to a simplified thermodynamic picture involving only temperature, pressure and some material constants. As it turns out, however, the classical description does not cover ultra-cold phenomena, like superconductivity, ...
... consider the full microscopic description of a system, it is often enough to resort to a simplified thermodynamic picture involving only temperature, pressure and some material constants. As it turns out, however, the classical description does not cover ultra-cold phenomena, like superconductivity, ...
Transport Properties of Interacting Edge Modes in 2D Topological
... materials, which are insulating in the bulk, but support gapless modes on the boundary. The presence of time-reversal symmetry in these systems implies a special structure of the edge modes, where spin-up and spin-down particles counterpropagate. Such edge modes are called helical. The net charge Ha ...
... materials, which are insulating in the bulk, but support gapless modes on the boundary. The presence of time-reversal symmetry in these systems implies a special structure of the edge modes, where spin-up and spin-down particles counterpropagate. Such edge modes are called helical. The net charge Ha ...
feasibility study
... temperature (-273C) was far removed from the technical possibilities of that century, so it seemed as if the problem was solved. In the 20th century, both theory and experiment have shown that there is a non-thermal radiation in the vacuum that persists even if the temperature could be lowered to ab ...
... temperature (-273C) was far removed from the technical possibilities of that century, so it seemed as if the problem was solved. In the 20th century, both theory and experiment have shown that there is a non-thermal radiation in the vacuum that persists even if the temperature could be lowered to ab ...
Kitaev - Anyons
... a stability consideration requires that u be a rational multiple of 2p.) Of course, the real question is whether such particles exist in nature or can be built somehow, but we will follow the historic path, approaching the problem from the mathematical end. The study of anyons was initiated by Wilcz ...
... a stability consideration requires that u be a rational multiple of 2p.) Of course, the real question is whether such particles exist in nature or can be built somehow, but we will follow the historic path, approaching the problem from the mathematical end. The study of anyons was initiated by Wilcz ...
test 3 practice
... ____ 36. What energy must be added or given off in a reaction where two hydrogen atoms and two neutrons are combined to form a helium atom? (Atomic masses for each: hydrogen, 1.007 825 u; neutron, 1.008 665 u; helium, 4.002 602 u; also, 1 u = 931.5 MeV/c2) a. 20.7 MeV added b. 20.7 MeV given off c. ...
... ____ 36. What energy must be added or given off in a reaction where two hydrogen atoms and two neutrons are combined to form a helium atom? (Atomic masses for each: hydrogen, 1.007 825 u; neutron, 1.008 665 u; helium, 4.002 602 u; also, 1 u = 931.5 MeV/c2) a. 20.7 MeV added b. 20.7 MeV given off c. ...
Decoherence and the Transition from Quantum to Classical
... If macroscopic systems cannot be always safely placed on the classical side of the boundary, then might there be no boundary at all? The Many Worlds Interpretation (or more accurately, the Many Universes Interpretation), developed by Hugh Everett III with encouragement from John Archibald Wheeler in ...
... If macroscopic systems cannot be always safely placed on the classical side of the boundary, then might there be no boundary at all? The Many Worlds Interpretation (or more accurately, the Many Universes Interpretation), developed by Hugh Everett III with encouragement from John Archibald Wheeler in ...
Quantum one-time programs
... alone, as any classical software can be re-run. Thus, any hope of achieving any one-time property must necessarily rely on an additional assumptions such as secure hardware or quantum mechanics: computational assumptions alone do not suffice. Classically, it has been shown [1,2,3] how to construct a ...
... alone, as any classical software can be re-run. Thus, any hope of achieving any one-time property must necessarily rely on an additional assumptions such as secure hardware or quantum mechanics: computational assumptions alone do not suffice. Classically, it has been shown [1,2,3] how to construct a ...
Far-from-equilibrium dynamics of ultra
... value problems is the closed-time-path (CTP) formalism developed by Schwinger [40], Bakshi and Mahanthappa [41, 42, 43], and Keldysh [44]. In this formalism, the initial conditions are specified by a density matrix that can be far from equilibrium. And the time evolution is governed by causal equati ...
... value problems is the closed-time-path (CTP) formalism developed by Schwinger [40], Bakshi and Mahanthappa [41, 42, 43], and Keldysh [44]. In this formalism, the initial conditions are specified by a density matrix that can be far from equilibrium. And the time evolution is governed by causal equati ...
Interplay of driving, nonlinearity and dissipation in nanoscale and ultracold atom systems
... dimensionality, (ii) the statistics of its constituent particles, (iii) the strength of the particle-particle interactions and (iv) the degree of disorder of the system: (i) Not all condensed matter systems are embedded in the ordinary threedimensional space. Reduced dimensionality arises in a latti ...
... dimensionality, (ii) the statistics of its constituent particles, (iii) the strength of the particle-particle interactions and (iv) the degree of disorder of the system: (i) Not all condensed matter systems are embedded in the ordinary threedimensional space. Reduced dimensionality arises in a latti ...
Renormalization
In quantum field theory, the statistical mechanics of fields, and the theory of self-similar geometric structures, renormalization is any of a collection of techniques used to treat infinities arising in calculated quantities.Renormalization specifies relationships between parameters in the theory when the parameters describing large distance scales differ from the parameters describing small distances. Physically, the pileup of contributions from an infinity of scales involved in a problem may then result in infinities. When describing space and time as a continuum, certain statistical and quantum mechanical constructions are ill defined. To define them, this continuum limit, the removal of the ""construction scaffolding"" of lattices at various scales, has to be taken carefully, as detailed below.Renormalization was first developed in quantum electrodynamics (QED) to make sense of infinite integrals in perturbation theory. Initially viewed as a suspect provisional procedure even by some of its originators, renormalization eventually was embraced as an important and self-consistent actual mechanism of scale physics in several fields of physics and mathematics. Today, the point of view has shifted: on the basis of the breakthrough renormalization group insights of Kenneth Wilson, the focus is on variation of physical quantities across contiguous scales, while distant scales are related to each other through ""effective"" descriptions. All scales are linked in a broadly systematic way, and the actual physics pertinent to each is extracted with the suitable specific computational techniques appropriate for each.