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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Learning Quantum Observables of Low Degrees from a Logarithmic Number of Random Queries
对数 随机查询 低次量子 可观察量
2023/4/14
A fundamental problem from computational learning theory is to well-reconstruct an unknown function on the discrete hypercubes. One classical result of this problem for the random query model is the l...
Extreme value laws in dynamical systems under physical observables
Extreme value laws dynamical systems physical observables
2011/8/18
Abstract: Extreme value theory for chaotic dynamical systems is a rapidly expanding area of research. Given a system and a real function (observable) defined on its phase space, extreme value theory s...
Observables for bound orbital motion in axially symmetric space-times
Observables axially symmetric space-times General Relativity and Quantum Cosmology
2011/10/10
Abstract: The periastron shift and the Lense-Thirring effect of bound orbital motion in a general axially symmetric space-time given by Pleba\'nski and Demia\'nski are analyzed. We also define a measu...
New flow observables
New flow observables
2011/7/21
Event-by-event fluctuations of the initial transverse density profile result in a collective flow pattern which also fluctuates event by event.
Construction of wedge-local nets of observables through Longo-Witten endomorphisms
wedge-local nets Longo-Witten endomorphisms High Energy Physics - Theory
2011/9/5
Abstract: A convenient framework to treat massless two-dimensional scattering theories has been established by Buchholz. In this framework, we show that the asymptotic algebra and the scattering matri...
An inhomogeneous toy-model of the quantum gravity with explicitly evolvable observables
quantum gravity inhomogeneous toy-model explicitly evolvable observables
2011/9/30
Abstract: We consider an inhomogeneous (1+1)-dimensional model of the quantum gravity, which has a system of constraints (hamiltonian and momentum ones) by analogy with that of the General Relativity....
Holonomy observables in Ponzano-Regge type state sum models
Holonomy observables Ponzano-Regge type state sum models group elements Chern-Simons theory
2011/7/29
Abstract: We study observables on group elements in the Ponzano-Regge model. We show that these observables have a natural interpretation in terms of Feynman diagrams on a sphere and contrast them to ...
Feasible optical weak measurements of complementary observables via a single Hamiltonian
optical weak measurements Hamiltonian optical weak measurements
2011/9/15
We show that the process of three-wave mixing in a non-linear crystal (such as employed in down conversion processes) can be used for versatile weak measurements. That is the crystal field interaction...
Extreme commutative quantum observables are sharp
commutative quantum non-commutativity the limitations of PVMs Quantum Physics
2011/7/29
Abstract: It is well known that, in the description of quantum observables, positive operator valued measures (POVMs) generalize projection valued measures (PVMs) and they also turn out be more optima...
Spin Observables in Transition-Distribution-Amplitude Studies
Spin Observables Transition-Distribution-Amplitude Studies
2010/12/27
Exclusive hadronic reactions with a massive lepton pair (l^+l^-) in the final state will be measured with PANDA at GSI-FAIR and with Compass at CERN, both in p+p-bar -> l^+l^-+pi and pi+N -> N'+l^+l^-...
Influence of nuclear de-excitation on observables relevant for space exploration
nuclear de-excitation observables relevant
2011/1/13
The composition of the space radiation environment inside spacecrafts is modified by the interaction with shielding material, with equipment and even with the astronauts' bodies. Accurate quantitativ...
Axial and electromagnetic observables of hyperons in 2-flavor chiral perturbation theory
Axial electromagnetic observables hyperons 2-flavor chiral perturbation theory
2011/1/6
Two-flavor chiral expansions provide a useful perturbative framework to study hadron properties. Such expansions should exhibit marked improvement over the conventional three-flavor chiral expansion. ...
Axial and electromagnetic observables of hyperons in 2-flavor chiral perturbation theory
Axial electromagnetic observables hyperons 2-flavor chiral perturbation theory
2011/1/6
Two-flavor chiral expansions provide a useful perturbative framework to study hadron properties. Such expansions should exhibit marked improvement over the conventional three-flavor chiral expansion. ...
Confining vs. conformal scenario for SU(2) with adjoint fermions. Gluonic observables
conformal scenario SU(2) adjoint fermions
2011/1/6
Walking technicolor is a mechanism for electroweak symmetry breaking without Higgs field. The Higgs mechanism is provided by chiral symmetry breaking in the technicolor theory. An essential ingredient...
Inflationary observables in loop quantum cosmology
Inflationary observables loop quantum cosmology
2010/12/27
The full set of cosmological observables coming from linear scalar and tensor perturbations of loop quantum cosmology is computed in the presence of inverse-volume corrections. Background inflationary...