#ground state

Wesley’s still sleeping with the enemy but obviously can’t trust her now she’s the Big Boss of the building.

At least Lorne’s back. His episode was interesting.

Fred is starting to show her inner Root. That’s cool.

What I love about asking people for suggestions is that I never know what episode someone will choose. Personally, I would never have chosen this episode but I like the challenge. Thanks!

Ground State

So, this episode isn’t a favorite which means this review won’t be my best one!

Okay then, this episode was supposed to introduce a new super hero - an actual X-Men style superhero - and a potential love interest for Angel. Since this episode introduced a character who lasted about three episodes and only worked as a love interest in one, maybe two, episodes, one could view Ground State as a bit of a failure, an aborted mission. 

I’ll admit to being one of the few people who never really liked Gwen Raiden. The most I like her is in Players. I think she was written as an absolute cliché and also as a typical male fantasy. From her outfit - both revealing, leathery and red or black, to the way she walked swaying her hips, to the fact that she couldn’t touch anyone which made everything sexual - see Gwen kissing Angel and having sex with Gunn….Needless to say, none of this impresses me. Even her wit and badassary seem designed to make her appealing to the male audience, as well as the female audience. 

Unsurprisingly, the Gwen side of the episode interests me the least. Her story reminds me too much of Rogue from X-Men, watching her threaten her client or expertly stealing something doesn’t make me weak in the knees. I also detest her kissing Angel. I know this argument might seem silly or even sexist, but Gwen looks like she’s barely 18 years old and at this point David Boreanaz looks about 30 something, so this pairing always looked wrong to me. Also, I hate these random kisses that are the equivalent of needless sex scenes in a HBO show. Gwen and Angel kiss, for some reason, and then Angel is like “Cordelia!”. `*massive eyeroll*… 

On a different note, I liked the playfulness of Angel and Gunn acting like boys and claiming to know how to get into a protected building. Fred has to come to their rescue here. I do dislike her crying though. I think it was a bit over the top. Lilah is in this episode and she’s great, as usual. Oh, and I love Weslah! 

Sooo, 7/10. I do dislike Gwen… 

PHY2403 (QFT I). Pondering the ground state bra formula.

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In lecture 14 we found

\begin{equation}\label{eqn:qftLecture15:60} \ket{\Omega} = \evalbar{ \frac{ U(t_0, -T) \ket{0} } { e^{-i E_0(T – t_0)} \braket{\Omega}{0} } }{T \rightarrow \infty(1 – i \epsilon)}, \end{equation} and it was stated that we can also show that \begin{equation}\label{eqn:qftLecture15:80} \bra{\Omega} = \evalbar{ \frac{…

PHY2403H Quantum Field Theory. Lecture 14: Time evolution, Hamiltonian perturbation, ground state. Taught by Prof. Erich Poppitz

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DISCLAIMER: Very rough notes from class, with some additional side notes.

These are notes for the UofT course PHY2403H, Quantum Field Theory, taught by Prof. Erich Poppitz, fall 2018.

Review

Given a field \( \phi(t_0, \Bx) \), satisfying the commutation relations \begin{equation}\label{eqn:qftLecture14:20} \antisymmetric{\pi(t_0,…