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- From: davis@pacific.mps.ohio-state.edu ("John E. Davis")
- Subject: Re: Trouble understanding bra-ket notation
- In-Reply-To: ask@ucscb.UCSC.EDU's message of 21 Jan 93 07:04:44 GMT
- Message-ID: <DAVIS.93Jan24012415@pacific.mps.ohio-state.edu>
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- Reply-To: davis@pacific.mps.ohio-state.edu (John E. Davis)
- Organization: "Dept. of Physics, The Ohio State University"
- References: <31c31z=@rpi.edu> <1993Jan17.214117.27235@galois.mit.edu>
- Distribution: usa
- Date: Sun, 24 Jan 1993 06:24:15 GMT
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-
-
- Feynman presents a nice discussion of Dirac Notation in Volume III of his
- famous lectures. I do not recommend this for learning QM though. Also,
- Baym's book introduces Dirac notation in a nice way but at a somewhat higher
- level.
-
- There is little difference between Dirac notation and the notation one usually
- sees in an abstract linear algebra class, namely, (A,B) for the innner product
- of A and B, etc... However, DIrac notation is particularly convenient when
- working with Hermitian operators. This avoids some of the ambiguity that
- could arise if one simply replaces `(` with `<', `,' with `|', and `)' with
- `>'. It also really pays off by labelling the kets by the eigenvalues as in
- |l m>, etc...
- --
- _____________
- #___/John E. Davis\_________________________________________________________
- #
- # internet: davis@amy.tch.harvard.edu
- # bitnet: davis@ohstpy
- # office: 617-735-6746
- #
-