When does a physical system compute?
... some notion of a mathematical computation, what does it mean to say that some physical system is ‘running’ a computation? If we want to use computational notions in physics, then what are the necessary and sufficient conditions under which we can say that a particular physical system is carrying out ...
... some notion of a mathematical computation, what does it mean to say that some physical system is ‘running’ a computation? If we want to use computational notions in physics, then what are the necessary and sufficient conditions under which we can say that a particular physical system is carrying out ...
The Structure of the Proton more than eighty years. It also has been
... observables and color non-singlets like quarks are not observables. This of course does not solve the problem of quark confinement. But it does give a more precise formulation for the quark confinement hypothesis. Another support for this hypothesis comes from the fact that we have not observed any ...
... observables and color non-singlets like quarks are not observables. This of course does not solve the problem of quark confinement. But it does give a more precise formulation for the quark confinement hypothesis. Another support for this hypothesis comes from the fact that we have not observed any ...
Classical phase-space analysis of vibronically coupled systems
... the classical limit. Well-known examples are the Ehrenfest mean-field limit in the wavefunction formulation [14–19], the quantum-classical Liouville equation for the density operator [20–25], and the stationary-phase approximation in the path-integral formulation [26,27]. Since electronic and nuclea ...
... the classical limit. Well-known examples are the Ehrenfest mean-field limit in the wavefunction formulation [14–19], the quantum-classical Liouville equation for the density operator [20–25], and the stationary-phase approximation in the path-integral formulation [26,27]. Since electronic and nuclea ...
5, 4023 (2014)
... we adiabatically Raman dress a BEC of 87Rb atoms in the j#i jF¼1; mF ¼ 1i and j"i jF¼1; mF ¼0i hyperfine states (see Methods). A magnetic bias field is applied that generates a sufficiently large quadratic Zeeman splitting such that the |F ¼ 1, mF ¼ 1S state can be neglected. The system can thus ...
... we adiabatically Raman dress a BEC of 87Rb atoms in the j#i jF¼1; mF ¼ 1i and j"i jF¼1; mF ¼0i hyperfine states (see Methods). A magnetic bias field is applied that generates a sufficiently large quadratic Zeeman splitting such that the |F ¼ 1, mF ¼ 1S state can be neglected. The system can thus ...
Quantum information with continuous variables
... states, entanglement between two 共bipartite兲 and between many 共multipartite兲 parties, and so-called bound 共undistillable兲 entanglement. The generation, measurement, and verification 共both theoretical and experimental兲 of continuous-variable entanglement are here of particular interest. As for the pr ...
... states, entanglement between two 共bipartite兲 and between many 共multipartite兲 parties, and so-called bound 共undistillable兲 entanglement. The generation, measurement, and verification 共both theoretical and experimental兲 of continuous-variable entanglement are here of particular interest. As for the pr ...
The Integer Quantum Hall Effect
... Equipotentials which stretch from one side of a sample to another are relatively rare but exist on the edge of the sample. The states at the far edge of a band (either of high or low energy) are localized. Only states close to the center of the band are extended. Since the localized states cannot co ...
... Equipotentials which stretch from one side of a sample to another are relatively rare but exist on the edge of the sample. The states at the far edge of a band (either of high or low energy) are localized. Only states close to the center of the band are extended. Since the localized states cannot co ...
Performance of Many–Body Perturbation Theory
... estimate the size of the neglected effects, but there is no such method (at least not yet), see section 2.2.2. For a small number of electrons the CI-approach can produce virtually exact results, provided of course that the basis set describes the physical space well enough. The size of the full CI ...
... estimate the size of the neglected effects, but there is no such method (at least not yet), see section 2.2.2. For a small number of electrons the CI-approach can produce virtually exact results, provided of course that the basis set describes the physical space well enough. The size of the full CI ...
Closed and Open String Theories in Non-Critical Backgrounds
... motivated by the concept of holography as manifested by open-closed string duality, study open strings in the black hole with the intention of getting information about the closed string gravitational theories. The third chapter sets forth the quantum field theory of open strings on D-branes in the ...
... motivated by the concept of holography as manifested by open-closed string duality, study open strings in the black hole with the intention of getting information about the closed string gravitational theories. The third chapter sets forth the quantum field theory of open strings on D-branes in the ...
On the equivalence of separability and extendability of quantum states
... It is fairly simple to see that separability implies complete extendability. The proof of the converse depends on an application of the quantum de Finetti theorem [?, ?], according to which any exchangable state is, indeed, separable. The link between separability and extendability has found applica ...
... It is fairly simple to see that separability implies complete extendability. The proof of the converse depends on an application of the quantum de Finetti theorem [?, ?], according to which any exchangable state is, indeed, separable. The link between separability and extendability has found applica ...
The Emperor`s New Mind by Roger Penrose
... may be the same one that will be required before we can write a unified theory of everything. "This is an astonishing claim, one that the critical reader might be tempted to dismiss out of hand were it broached by a thinker of lesser stature. But Mr. Penrose is a gifted mathematician with an impress ...
... may be the same one that will be required before we can write a unified theory of everything. "This is an astonishing claim, one that the critical reader might be tempted to dismiss out of hand were it broached by a thinker of lesser stature. But Mr. Penrose is a gifted mathematician with an impress ...
Paper
... clouds were generated and used for precision measurements and studies of ultracold collisions. Nanokelvin temperatures were necessary to explore quantum-degenerate gases, such as the Bose–Einstein condensates (BECs) first realized in 1995. Each of these achievements in cooling has been a significant ...
... clouds were generated and used for precision measurements and studies of ultracold collisions. Nanokelvin temperatures were necessary to explore quantum-degenerate gases, such as the Bose–Einstein condensates (BECs) first realized in 1995. Each of these achievements in cooling has been a significant ...
cluster algebras in algebraic lie theory
... 7 Quantum cluster structures on quantum coordinate rings ...
... 7 Quantum cluster structures on quantum coordinate rings ...
Hypercontractivity for free products
... has motivated some other extensions to the noncommutative setting more focused on its applications to quantum computation and quantum information theory. In [3], the authors studied extensions of Bonami’s result to matrix-valued functions f : Zn2 → Mn (C), finding optimal estimates for q = 2 and sho ...
... has motivated some other extensions to the noncommutative setting more focused on its applications to quantum computation and quantum information theory. In [3], the authors studied extensions of Bonami’s result to matrix-valued functions f : Zn2 → Mn (C), finding optimal estimates for q = 2 and sho ...
Two-resonator circuit quantum electrodynamics: Dissipative theory
... from fluctuators on the resonator surface, which are usually modeled as two-level systems. Thus, we interpret the J共兲 in an effective sense in that they include both the effects of external circuitry and internal losses. Our effective description does not cover the so-called excess phase noise tho ...
... from fluctuators on the resonator surface, which are usually modeled as two-level systems. Thus, we interpret the J共兲 in an effective sense in that they include both the effects of external circuitry and internal losses. Our effective description does not cover the so-called excess phase noise tho ...
Quantum transport signatures of chiral edge states in Sr2RuO4
... with z-axis parallel to the four-fold crystalline symmetry axis. Although Sr2 RuO4 is a three-band metal there are strong indications that only one band, the genuinely two-dimensional γ-band, is dominating superconductivity [13, 14] so that it is justified to use a single-band ...
... with z-axis parallel to the four-fold crystalline symmetry axis. Although Sr2 RuO4 is a three-band metal there are strong indications that only one band, the genuinely two-dimensional γ-band, is dominating superconductivity [13, 14] so that it is justified to use a single-band ...
CONCEPTUAL FOUNDATIONS OF THE UNI- FIED THEORY OF WEAK AND ELECTROMAG-
... by something like the Higgs mechanism, but since the theory would not be gauge invariant the pions would remain as physical Goldstone bosons. This theory gave an intriguing result, that the Al/e mass ratio should be r/2, and in trying to understand this result without relying on perturbation theory, ...
... by something like the Higgs mechanism, but since the theory would not be gauge invariant the pions would remain as physical Goldstone bosons. This theory gave an intriguing result, that the Al/e mass ratio should be r/2, and in trying to understand this result without relying on perturbation theory, ...
