All Questions
Tagged with physics probability-or-statistics
20
questions
7
votes
2
answers
364
views
Measurement error propagation onto fitting-parameters
I have a dataset consisting of (t,y) Tuples, where each y has a known measurement error (standard deviation). I would like to fit a trapaze-function into the data and obtain the fitting paramaters and ...
- 73
0
votes
1
answer
269
views
Is there a way of calculating Expectation Values of tensor operators in Mathematica?
This Wikipedia article in on Bell's Theorem lists a whole bunch of expectation values for Bell states:
$$\langle A_0 \otimes B_0 \rangle = \frac{1}{\sqrt{2}}, \langle A_0 \otimes B_1 \rangle = \frac{1}...
- 243
5
votes
1
answer
347
views
Monte Carlo Simulation of Charged Particles in Non-Uniform Electric Field
I have a code (provided below) which simulates the motion of an ensemble of charged particles which are subjected to a complex static electric field which passes through some aperture in a metallic ...
- 373
3
votes
1
answer
157
views
Error in Metropolis-Hastings with three states?
I wanted to create a simple example of the Metropolis-Hastings algorithm as a sanity check but the check failed and the results do not line up. I have a vector of energies $\vec E=(E_1,E_2,E_3)$ and ...
0
votes
0
answers
215
views
Error Integrate::ilim: Invalid integration variable or limit(s) in {0.1,0,1}. please help
I am making the code you can see below. I believe the error is that when I plug in values for x it also feeds back to the "dx" in the integration, how can I go around that?
...
2
votes
2
answers
240
views
Can the CopulaDistributions be fitted?
This is an immediate follow-up to DoAny--which I did consider editing, clarifying and correcting in some respects.
But perhaps here I can put the immediate question at hand more directly (the emphasis ...
- 2,335
1
vote
3
answers
317
views
Do any of the Mathematica CopulaDistributions (or others) fit well this sampled bivariate copula with uniform marginals over [0,1]?
I'm currently developing a data set that consists of two $50 \times 50$ matrices, which I designate as q1 and Q1. I strongly believe (bordering on formal proof [cf. Corollary 1 in marginalinvariance]) ...
- 2,335
1
vote
1
answer
162
views
Can this previously solved three-dimensional constrained integration also be solved with certain added products in the integrand?
In Solved3DConstrainedIntegration
the constrained three-dimensional (Hilbert-Schmidt-metric-based HSmetric) integration problem for the absolute separability probability of the two-qubit (quantum bit)...
- 2,335
1
vote
2
answers
214
views
3
votes
1
answer
156
views
Problem with fitting a given data with an equation
I want to fit a given data using the approach developed by @Bob Hanlon here: Fit and find fitting parameters of data given an equation
I have tried this approach for several different data sets but I ...
- 1,651
0
votes
1
answer
109
views
Find the probability (relative volume) of a certain 4-ball with respect to Hilbert-Schmidt measure
Let us consider the set of points {x,y,z,1-x-y-z} and impose the strict ordering constraint
...
- 2,335
1
vote
2
answers
197
views
Confirm and possibly simplify a 2009 result for a 2D constrained integration
This is a direct descendant of two other recent questions,
3D and Equivalence,
both of which have been
answered in skillful, interesting manners. (See also the comment [actually answer] of JimB to
...
- 2,335
1
vote
1
answer
320
views
Evaluate 3D- and 5D-constrained integrals for absolute separability probabilities
In a recent posting,
TwoQubits
user JimB, employing a change-of-transformations put forth by N. Tessore, was able to confirm a formula for the "two-qubit absolute separability Hilbert-Schmidt ...
- 2,335
3
votes
3
answers
433
views
Evaluate a certain three-dimensional constrained integral
The result of the three-dimensional integration
...
- 2,335
-1
votes
1
answer
102
views
Can the WishartMatrixDistribution command be used for generating random density matrices?
I am interested in generating random members of two classes of $n \times n$ positive-definite matrices $A$ and $B$--the former symmetric in nature, the latter, Hermitian.
The standard (Ginibre-matrix-...
- 2,335