An Expression for a Measurement Equation

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Homework Help Overview

The discussion revolves around the formulation of an expression involving a measurement equation, specifically relating to the coupling between an observer and an observed system through the function J(t). Participants explore how to combine two fields into a single expression, considering the implications of field collapse.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the relationship between the fields and the measurement equation, questioning whether the proposed expressions effectively imply the connection between the two fields. There are attempts to clarify the independence of J(t) from the field and to analyze the implications of various mathematical transformations.

Discussion Status

The conversation is ongoing, with participants seeking clarity on their expressions and questioning the validity of their deductions. Some have provided alternative formulations and raised concerns about previous errors, indicating a desire for constructive feedback and further exploration of the topic.

Contextual Notes

There are indications of confusion regarding the mathematical expressions and their implications, as well as a need for clearer definitions of terms and assumptions related to the fields and the measurement equation.

ManyNames
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Homework Statement



Knowing the given equations, [tex]k[/tex] is equal to a measurement where [tex]J(t)[/tex] implies some local coupling between the observer and observed system. If a field is considered to collapse [tex]J(t)[/tex], how would the two manifest into a single expression.

Homework Equations



[tex]k=\frac{(t<t_0)-(t>t_1)}{\int_{t_0}^{t_1} dt J(t)}[/tex]

[tex]J(t)=\int_{\Omega}\Pi |\psi|^2[/tex]

The Attempt at a Solution



[tex]\psi*(\Pi_{(k)}(\psi))[/tex]

Do you think this expression helps imply the two fields [tex]\psi[/tex] with the given information?
 
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The first equation is meant to look like

[tex]k=\frac{(t<t_0)-(t>t_1)}{\int_{t_0}^{t_1} dt J(t)}[/tex]
 
Can no one answer my question? I'd be very grateful.
 
ManyNames said:

Homework Statement



Knowing the given equations, [tex]k[/tex] is equal to a measurement where [tex]J(t)[/tex] implies some local coupling between the observer and observed system. If a field is considered to collapse [tex]J(t)[/tex], how would the two manifest into a single expression.

Homework Equations



[tex]k=\frac{(t<t_0)-(t>t_1)}{\int_{t_0}^{t_1} dt J(t)}[/tex]

[tex]J(t)=\int_{\Omega}\Pi |\psi|^2[/tex]

The Attempt at a Solution



[tex]\psi*(\Pi_{(k)}(\psi))[/tex]

Do you think this expression helps imply the two fields [tex]\psi[/tex] with the given information?

Also, it seems that [tex]J(t)[/tex] should be treated as independent from the field describing the collapse in the expression. In the expression, there could be another two quantum wave fields;

[tex]\psi* (\Pi_{(k)}(\psi))=|\psi|^2 (\Pi_{(k)})[/tex]

Does this seem reasonable?
 
Am i allowed to deduct the following?

[tex]\frac{d\Lamba \psi \rightarrow d\Pi(|\psi|^2)}{\int_{t_0}^{t_1}\Pi_{k}^n}=\sum^{\Pi}_{n} \xi^n(t) |\psi|^2[/tex]

Where [tex]\xi^n(t)[/tex] is the probability of global changes, where it must vanish totally upon the square of the density. Then back to the original assumptions, we can treat [tex]J(t)[/tex] as it is and [tex]\psi*(\Pi_{k}(\psi))[/tex] as:

[tex]\psi_i*(\Pi_{k}(\psi_i))[/tex]

So thus implying a series with a linear function. It would be fair to analyse the convergent monotonic series idea with both fields in J(t) and contained in [tex]\psi_i*(\Pi_{k}(\psi_i))[/tex] as:

[tex]J(t)_i=\begin{pmatrix} i=2k \\ i=2k+1 \end{pmatrix}[/tex]

[tex]\psi_i*=\begin{pmatrix} i*=2k \\ i*=2k+1 \end{pmatrix}[/tex]

If they converge synomynously, then it is fair to say they are asympototically-equivalant in respect to time:

[tex]\sum^{\Pi}_{n} \xi^{n}(t) |\psi|^2 \approx J(t)[/tex]
 
That was riddled with errors. Hopefully this is more clear

Am i allowed to deduct the following?

[tex]\frac{d\Lamba \psi \rightarrow d\Pi(|\psi|^2)}{\int_{t_0}^{t_1}\Pi_{k}^n}=\sum^{\Pi}_{n} \xi^n(t) |\psi|^2[/tex]

Where [tex]\xi^n(t)[/tex] is the probability of global changes, where it must vanish totally upon the square of the density. Then back to the original assumptions, we can treat [tex]J(t)[/tex] as it is and [tex]\psi*(\Pi_{k}(\psi))[/tex] as:

[tex]\psi_i*(\Pi_{k}(\psi_i))[/tex]

So thus implying a series with a linear function. It would be fair to analyse the convergent monotonic series idea with both fields in J(t) and contained in [tex]\psi_i*(\Pi_{k}(\psi_i))[/tex] as:

[tex]\Pi J(t)_i=\begin{pmatrix} i=2k \\ i=2k+1 \end{pmatrix}[/tex]

[tex]\Lambda \psi_i*=\begin{pmatrix} i*=2k \\ i*=2k+1 \end{pmatrix}[/tex]

If they converge synomynously, then it is fair to say they are asympototically-equivalant in respect to time:

[tex]\sum^{\Pi}_{n} \xi^{n}(t) |\psi|^2 \sim J(t)[/tex]
 

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