Insights Blog
-- Browse All Articles --
Physics Articles
Physics Tutorials
Physics Guides
Physics FAQ
Math Articles
Math Tutorials
Math Guides
Math FAQ
Education Articles
Education Guides
Bio/Chem Articles
Technology Guides
Computer Science Tutorials
Forums
Intro Physics Homework Help
Advanced Physics Homework Help
Precalculus Homework Help
Calculus Homework Help
Bio/Chem Homework Help
Engineering Homework Help
Trending
Featured Threads
Log in
Register
What's new
Search
Search
Search titles only
By:
Intro Physics Homework Help
Advanced Physics Homework Help
Precalculus Homework Help
Calculus Homework Help
Bio/Chem Homework Help
Engineering Homework Help
Menu
Log in
Register
Navigation
More options
Contact us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Homework Help
Introductory Physics Homework Help
Time-energy uncertainty and derivative of an operator
Reply to thread
Message
[QUOTE="jfizzix, post: 4963341, member: 190322"] To take the time derivative of [itex]e^{At}[/itex] with respect to [itex]t[/itex], you can take the power series expansion of [itex]e^{At}[/itex], differentiate term by term, and re-exponentiate, since what you get left should be [itex]A[/itex] times another exponential. For the second problem, it looks like they're asking you to calculate the uncertainty product [itex]\Delta E\Delta t[/itex] from the given information. Then you can see for yourself how much larger than [itex]\frac{\hbar}{2}[/itex] it is. [/QUOTE]
Insert quotes…
Post reply
Forums
Homework Help
Introductory Physics Homework Help
Time-energy uncertainty and derivative of an operator
Back
Top