Quantum tomography via compressed sensing: error bounds, sample complexity and... estimators
... constraints (e.g. low temperature or the locality of interactions) ensure that the actual (noisy) state still has low entropy. This approach is convenient because it does not require detailed knowledge about the system. However, note that when such knowledge is available, one can use alternative for ...
... constraints (e.g. low temperature or the locality of interactions) ensure that the actual (noisy) state still has low entropy. This approach is convenient because it does not require detailed knowledge about the system. However, note that when such knowledge is available, one can use alternative for ...
Quantum dynamics in strong fluctuating fields - Physik Uni
... with an infinite spectrum of excitations. Such models can be solved exactly in a number of specific cases [35, 38, 40–44]. All the thermal baths possess, however, finite energy spectra. This circumstance gives rise to temporal autocorrelations in the bath-induced classical stochastic fields. Gaussian-Ma ...
... with an infinite spectrum of excitations. Such models can be solved exactly in a number of specific cases [35, 38, 40–44]. All the thermal baths possess, however, finite energy spectra. This circumstance gives rise to temporal autocorrelations in the bath-induced classical stochastic fields. Gaussian-Ma ...
Resource Letter SPE-1: Single-Photon Experiments in the Undergraduate Laboratory
... 31. “A simple experiment for discussion of quantum interference and which-way measurement,” M. B. Schneider and I. A. LaPuma, Am. J. Phys. 70, 266–271 (2002). With widespread use of digital cameras, it is now possible to produce demonstrations of low-light interference by the build-up of photon dete ...
... 31. “A simple experiment for discussion of quantum interference and which-way measurement,” M. B. Schneider and I. A. LaPuma, Am. J. Phys. 70, 266–271 (2002). With widespread use of digital cameras, it is now possible to produce demonstrations of low-light interference by the build-up of photon dete ...
Antihydrogen Gravitational States Abstract - Institut Laue
... to as the Weak Equivalence Principle (WEP). Violations of WEP could occur in ordinary matter-matter interactions e.g. as a result of the difference in the gravitational coupling to the rest mass and that to the binding energy. WEP is being tested with increasing sensitivity for macroscopic bodies. T ...
... to as the Weak Equivalence Principle (WEP). Violations of WEP could occur in ordinary matter-matter interactions e.g. as a result of the difference in the gravitational coupling to the rest mass and that to the binding energy. WEP is being tested with increasing sensitivity for macroscopic bodies. T ...
Huge density-dependent blueshift of indirect excitons in biased
... density, it persists to very late times, while many schemes of optical switching require fast extinction. This is because we have used above-gap excitation in these experiments. It is therefore important in the future to perform a standard optical Stark shift experiment on this type of structure in ...
... density, it persists to very late times, while many schemes of optical switching require fast extinction. This is because we have used above-gap excitation in these experiments. It is therefore important in the future to perform a standard optical Stark shift experiment on this type of structure in ...
It is natural to think of quantum computations as multiparticle
... used as a qubit providing that it is possible to define one of his states as |0 and another as |1. It is practical to have a fixed pair of reliably distinguishable states of the qubit (for example horizontal and vertical photon polarization). More generally two quantum states are reliably distingu ...
... used as a qubit providing that it is possible to define one of his states as |0 and another as |1. It is practical to have a fixed pair of reliably distinguishable states of the qubit (for example horizontal and vertical photon polarization). More generally two quantum states are reliably distingu ...
The quantum states of muons in fluorides
... may lectronegative O2− ions [55].be an external magne=c field. A perturbation The• exact structure the 3.2 available neutron 2 is unknown In magnetic systems with ofaPrO non-‐zero mand agne=za=on also happroach ave data are consistent with either ...
... may lectronegative O2− ions [55].be an external magne=c field. A perturbation The• exact structure the 3.2 available neutron 2 is unknown In magnetic systems with ofaPrO non-‐zero mand agne=za=on also happroach ave data are consistent with either ...
Analysis of General Geometric Scaling Perturbations in a Transmitting Waveguide: Fundamental Connection Between Polarization-Mode Dispersion and Group-Velocity Dispersion
... discontinuous high-index contrast variations of the refractive index across a waveguide cross section. We establish that, if at some frequencies a particular mode behaves like pure TE or TM polarized mode (polarization is judged by the relative amounts of the electric and magnetic longitudinal energ ...
... discontinuous high-index contrast variations of the refractive index across a waveguide cross section. We establish that, if at some frequencies a particular mode behaves like pure TE or TM polarized mode (polarization is judged by the relative amounts of the electric and magnetic longitudinal energ ...
lecture 3
... – 1791: One ten-millionth of ¼ Earth’s meridian through Paris – 1799: Platinum meter bar (refined in 1889 and 1927) – 1960: 1,650,763.73 wavelengths of 2p105d5 of Kr-86 – 1983: Length traveled by light in vacuum in 1/299,762,458 of a sec – 2002: “… as long as GR effects are negligible.” L. R. Flore ...
... – 1791: One ten-millionth of ¼ Earth’s meridian through Paris – 1799: Platinum meter bar (refined in 1889 and 1927) – 1960: 1,650,763.73 wavelengths of 2p105d5 of Kr-86 – 1983: Length traveled by light in vacuum in 1/299,762,458 of a sec – 2002: “… as long as GR effects are negligible.” L. R. Flore ...
Reaction rate theory: What it was, where is it today, and where is it
... universal time constant with the ratio of the partition function of the activated complex 共which has one degree of freedom less than the reactants兲 to the partition function of the reactants. Eyring’s formulation, in terms of partition functions allowed a heuristic quantum mechanical formulation for ...
... universal time constant with the ratio of the partition function of the activated complex 共which has one degree of freedom less than the reactants兲 to the partition function of the reactants. Eyring’s formulation, in terms of partition functions allowed a heuristic quantum mechanical formulation for ...
Exam 1 Sol
... with n an integer. Note that the IVT can be applied only on a closed interval included in the domain of the function. The function must be continuous over the whole interval: hence it is not correct to use the IVT on [0, π] as this interval contains π2 , where tan x is discontinuous. (c) Below are t ...
... with n an integer. Note that the IVT can be applied only on a closed interval included in the domain of the function. The function must be continuous over the whole interval: hence it is not correct to use the IVT on [0, π] as this interval contains π2 , where tan x is discontinuous. (c) Below are t ...
Reply to criticism of the ‘Orch OR qubit’ – ‘Orchestrated... reduction’ is scientifically justified
... force electric dipoles” have been discussed in previous publications but the other two options have been introduced for the first time. H&P True. London force ‘electric dipoles’ remain the primary description for mediating quantum states in tubulin and microtubules, with magnetic dipoles (electron s ...
... force electric dipoles” have been discussed in previous publications but the other two options have been introduced for the first time. H&P True. London force ‘electric dipoles’ remain the primary description for mediating quantum states in tubulin and microtubules, with magnetic dipoles (electron s ...
Inflation without a beginning: a null boundary proposal
... If we then require that the field be continuous along any geodesic, we then find that the field must be in the false vacuum φf everywhere on the surface J − . That is, at the semi-classical level of description, J − must be an infinite null surface of pure false vacuum, through which no bubbles pass ...
... If we then require that the field be continuous along any geodesic, we then find that the field must be in the false vacuum φf everywhere on the surface J − . That is, at the semi-classical level of description, J − must be an infinite null surface of pure false vacuum, through which no bubbles pass ...
THE LEAST ACTION PRINCIPLE AND THE RELATED CONCEPT
... Unfortunately, at this point it becomes extremely difficult to define the Action in terms of J.l, and so we give up this approach in this paper. The main problem is the lack of dynamics in the description of a generalized flow as a one parameter family of doubly stochastic probability measures (simi ...
... Unfortunately, at this point it becomes extremely difficult to define the Action in terms of J.l, and so we give up this approach in this paper. The main problem is the lack of dynamics in the description of a generalized flow as a one parameter family of doubly stochastic probability measures (simi ...
Renormalization group
In theoretical physics, the renormalization group (RG) refers to a mathematical apparatus that allows systematic investigation of the changes of a physical system as viewed at different distance scales. In particle physics, it reflects the changes in the underlying force laws (codified in a quantum field theory) as the energy scale at which physical processes occur varies, energy/momentum and resolution distance scales being effectively conjugate under the uncertainty principle (cf. Compton wavelength).A change in scale is called a ""scale transformation"". The renormalization group is intimately related to ""scale invariance"" and ""conformal invariance"", symmetries in which a system appears the same at all scales (so-called self-similarity). (However, note that scale transformations are included in conformal transformations, in general: the latter including additional symmetry generators associated with special conformal transformations.)As the scale varies, it is as if one is changing the magnifying power of a notional microscope viewing the system. In so-called renormalizable theories, the system at one scale will generally be seen to consist of self-similar copies of itself when viewed at a smaller scale, with different parameters describing the components of the system. The components, or fundamental variables, may relate to atoms, elementary particles, atomic spins, etc. The parameters of the theory typically describe the interactions of the components. These may be variable ""couplings"" which measure the strength of various forces, or mass parameters themselves. The components themselves may appear to be composed of more of the self-same components as one goes to shorter distances.For example, in quantum electrodynamics (QED), an electron appears to be composed of electrons, positrons (anti-electrons) and photons, as one views it at higher resolution, at very short distances. The electron at such short distances has a slightly different electric charge than does the ""dressed electron"" seen at large distances, and this change, or ""running,"" in the value of the electric charge is determined by the renormalization group equation.