Dimension of <xn,tn|xn-1,tn-1>

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In summary, the conversation is about a person having trouble understanding the dimension of a specific notation in Sakurai's <modern quantum mechanics>. They ask for an explanation and the other person clarifies that it means 1/length when doing dimensional analysis. They also suggest a better way to write the subscripts. The person then asks for a dimensional analysis and clarification on what the state vector represents. The conversation ends with the person stating their understanding and asking for help.
  • #1
einstein1921
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HI! Everyone!I have a problem! I read sakurai's <modern quantum mechanics>.It reads the dimension of <xn,tn|xn-1,tn-1> is 1/length.I DON'T understand!would you like to give me some explanations? thank you!
 
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  • #2
What don't you understand - it's saying that if you did a dimensional analysis on that thing it would come up with 1/L

Note - you can write in the subscripts in two ways:

<xn,tn|xn-1,tn-1>

or

[itex]\langle x_n , t_n \mid x_{n-1}, t_{n-1} \rangle[/itex]

the second one is best. (assuming you meant the subscripts...)
hit the "quote" button at the bottom of this reply to see what I did.
 
  • #3
Simon Bridge said:
What don't you understand - it's saying that if you did a dimensional analysis on that thing it would come up with 1/L

Note - you can write in the subscripts in two ways:

<xn,tn|xn-1,tn-1>

or

[itex]\langle x_n , t_n \mid x_{n-1}, t_{n-1} \rangle[/itex]

the second one is best. (assuming you meant the subscripts...)
hit the "quote" button at the bottom of this reply to see what I did.

Thank you ,Simon.I don't understand why the dimension is 1/length.Could you please did a dimensional analysis for me?
 
  • #4
What does the state vector [itex]| x,t \rangle[/itex] represent?
 
  • #5
Simon Bridge said:
What does the state vector [itex]| x,t \rangle[/itex] represent?

at time t,particle localize x! I think dimension is length.so I need help. Thank you!
 

FAQ: Dimension of <xn,tn|xn-1,tn-1>

What is the meaning of "Dimension of "?

The dimension of refers to the number of independent variables and time points in a given system or data set. It is used to describe the size and complexity of a system and is an important factor in many scientific analyses and models.

How is the dimension of determined?

The dimension of is typically determined by the number of variables and time points that are included in the data set or system. For example, if a system has 3 independent variables and 20 time points, its dimension would be 3x20.

What is the significance of the dimension of in scientific research?

The dimension of is important in scientific research as it helps to determine the complexity and scope of a system or data set. It can also impact the types of analyses and models that can be used to study the system, as well as the interpretation of results.

Can the dimension of change over time?

Yes, the dimension of can change over time depending on the specific system or data being studied. For example, if new variables or time points are added to a data set, the dimension will increase. Similarly, if variables or time points are removed, the dimension will decrease.

How does the dimension of relate to other statistical measures?

The dimension of is often related to other statistical measures such as degrees of freedom, sample size, and dimensionality reduction techniques. It is an important factor to consider when interpreting and analyzing data, as it can impact the validity and reliability of statistical results.

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