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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...
Response to Pashby:Time operators and POVM observables in quantum mechanics
parameter time time operators time observables PVM POVM
2016/6/13
I argue against a general time observable in quantum mechanics except for quantum gravity theory. Then I argue in support of case specific arrival time and dwell time observables with a cautionary not...
ON THE REALISTIC STOCHASTIC MODEL OF GPS OBSERVABLES: IMPLEMENTATION AND PERFORMANCE
GPS stochastic model Least-squares variance component estimation (LS-VCE) noise assessment integer ambiguity resolution (IAR) Success rate GPS observables
2016/1/18
High-precision GPS positioning requires a realistic stochastic model of observables. A realistic GPS stochastic model of observables should take into account different variances for different observat...
Enhanced model for precise point positioning with single and dual frequency GPS/Galileo observables
GNSS PPP GPS Galileo Single frequency Dual frequency
2014/11/28
This paper introduces a newly developed model for both single and dual-frequency precise point positioning (PPP), which combines GPS and Galileo observables. As is well known, a drawback of a single G...
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 ...
New flow observables
New flow observables
2011/7/20
Event-by-event fluctuations of the initial transverse density profile result in a collective flow pattern which also fluctuates event by event. We propose a number of new correlation observables to ch...
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...
A study of the correlations between jet quenching observables at RHIC
Relativistic heavy-ion collisions Quark-gluon plasma Jet quenching, Jet Tomography
2011/10/11
Abstract: Focusing on four types of correlation plots, $R_{\rm AA}$ vs. $v_2$, $R_{\rm AA}$ vs. $I_{\rm AA}$, $I_{\rm AA}$ vs. $v_2^{I_{\rm AA}}$ and $v_2$ vs.\ $v_2^{I_{\rm AA}}$, we demonstrate how ...
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^-...