phoenix's universephoenix's universe
phoenix_mitnerd
read my profile
sign my guestbook

Visit phoenix_mitnerd's Xanga Site!

Name: Phoenix
Metro: Boulder
Gender: Female


Interests: challenging my mind


Message: message me
Website: visit my website


Member Since: 1/11/2005

SubscriptionsSites I Read
yanchanky
curtis_leung0901

Blogrings
~* ELT2501 *~
previous - random - next

CUHK Physics
previous - random - next

CUHK Physics 2004 EASers
previous - random - next

CUHK Physics 2007
previous - random - next


Posting Calendar

|<< oldest | newest >>|
view all weblog archives

Get Involved!

Suggest a link

Recommend to friend

Create a site


Sunday, July 26, 2009

Back? Maybe a little bit...

    Thanks to QuantaSham's reminder, I came to realize that I haven't been to Xanga for more than 5 months.  Now I am more or less constantly updating my lab log and labbing experience in my own Tiddly about electronics and optics techinique.  This update is just some short summary about my life in Boulder recently.

    I had a lot of doubts about myself and my ability before deciding to go to graduate school, not scared by some comments, just genuinely doubted my capability of continuing onto this track.  But I decided to take the risk.  I mean, I am only at my early 20's, I can do some experimental trial with my life for one or two years and see whether I love it or I hate it.  So, I went to Boulder -- an extremely sporty and outdoorsy place with a 1/3 of residential population having their Ph.D's (or equivalent degrees).

    After a year, I don't know what else to say except for I ABSOLUTELY LOVE THIS PLACE AND WHAT I AM DOING IN MY LIFE.  I can make this bold statement at least about myself, I have never been so happy in my entire life!  This is proabably the most insightful decision I have ever made!

    We have the very best and frontier equipment (as far as I know, we have 3 bath-tub-sized sonic cleaner while MIT only has a small-drawer-sized one!) , supporting staff, collaborative environment, and so much FUN!  My schedule is a bit crazy, I usually get in lab at about 8 or 9 am and leave at around 9 or 10 pm, although every Thursday night I play right field in our physics softball team.  Debbie Jin and Nobel laureaute Eric Cornell (YES! This one-arm man plays softball VERY VERY WELL!!) play in JILA monster, one of these days, we will beat them!

    The first two semesters were mainly course taking.  Quantum Mechanics I&II, Electrodynamics I&II, Laser Fundamentals and Statistical Mechanics were the 6 courses I chose.  I had a blast in my QM I&II.  My instructor for the course was Dr. Chris Greene.  He is ONE smart guy, doing hardcore AMO theory and has a great sense of humor!!  I had a lot of good time asking him questions about 9j-symbol, irreducible tensor, Fermi golden rules, scattering, etc.  I became a research assistant officially on the 2nd semester and built two lasers and one avalanche photodetector on my own.  Besides study and research in lab, a couple of events were memorable as well, my French maid costume in Haloween party, my trip to Los Angeles to visit Brittney and to Santa Barbara to visit Cherry, my winter vacation, the thanksgiving hot pot party, and so on.  

    The summer has been fabulous!  I got my new road bike and all biking gears that I need to train myself for September's buffalo 50miles' race.  I have been hiking in Rocky Mountain a lot and I did a hardcore camping at Rooservelt National Forest and looking forward to another one.  The trip outside Colorado was so much fun, I ate a lot of seafood and had fun watching dolphins only about 100 yards away at the beach.  We also find a great karaokie place for Saturday nights' gathering.  There are times I play frisbee golf and go to bar or play guitar heroes with friends after labbing, which was definitely fun.  We also got a new griller in the backyard, so we have been doing BBQ's a lot!  There is even a park that has batting cage, go-karts, and mini golf there!!!!  And Denver has been such a  great place for music bands, club dancing.  Even movies on air recently are a lot funnier, e.g. the Hangover, Up, Bruno, etc.  There are so many plans ahead, go whitewater rafting, go kayaking more with Tory, go paintball fighting, and have more impromptu blast! Hurray!

    Of course, the most important thing is to go to work, but it's so much fun, I can't believe I am getting paid (and paid well) to do something I would absolutely do just for free. 

    And the summer is closing to an end, but our softball team is moving to the fall league, so we are still in game every Thursday and practicing with JILA monster every Monday practice and the blast won't end.


Saturday, February 07, 2009

Let me try to explain what I do in physics...


看小何写了一篇令我荡气回肠的文,小徐同学跟风也写了一篇,貌似这两个人是因为某宝同学(俺不认识though)写了一篇原始的"说说我是干什么的"的文,那我也来写写我是干什么的。

生物科系的分类很有意思,(我个人的感觉)是从研究对象的scale来进行一定分野的,抄小何的分类来看,molecular, cellular,behavioral, ecology, etc,貌似是从小到大排列的,所以小何的解答也是从proximate causation(某种意义上,我觉得是partial causation)到 ultimate causation逐步升级的。

好了,回来说我这个搞物理的。物理的分类就无趣的多,是按照研究对象的不同而进行分类的,听听就知道了,astrophysics (天体物理), plasma physics (等离子体物理), condensed matter physics (凝聚态物理), high energy physics (高能物理), atomic physics (原子物理), etc.

首先来回答这个问题,为什么物理是这样的分类呢?和生物不同,不论你讨论的系统是大是小,是活是死,是复杂是简单,是男是女,你都能写下这个系统符合的物理定律,比如,经典体系写牛顿三定律(Newtonian mechanics),量子体系写Schrodinger equation,等等。。。而这些对数学描述的研究都是在物理学的意义上要解决的对系统的基本了解,你的过去,你的现在,你的将来,你为什么会这样,你什么时候什么地方会以怎样的概率怎么样,等等,(在理想化的情况下)应该都能加以explain解释。(ps.关于chaos,uncertain relation的情况怎么样,我说能explain解释,没说能predict预测,也没说deterministic确定性),那这样就清楚了,既然对任何系统,最基本的了解都是从共有的数学描述出发去理解一个事物,那所有的数学描述应该给与同一程度上的理解,而不存在proximate和ultimate之分,所以,按照生物学的分类是没办法给物理分类的(虽然物理学的分类令我觉得很boring)。

其次,来回答这个问题,我学的分类又是哪个?我的专业方向叫:atomic, molecular, optical physics,简称AMO,研究对象从字面上来理解就是原子、分子、光学。关于对象进行分类的学科又存在一个相对要细化的问题,你学这个对象的什么呢?全部?某一方面?atomic, molecular, optical之间的相互关系?我可以说以上都对,又不全对。知识何其浩瀚,说要学全部,那绝对狂妄了;说对某一方面权威或者之间联系的权威,那也是要汗牛充栋的学问。要学什么,更取决于你的课题是什么,比如,如果我要用laser激光了,那相关的量子物理,光学,还有和激光能量有关的原子分子能量级就要掌握一下了。所以学什么,懂什么,非常取决于你做什么。比如一个人做的是和BEC(Bose-Einstein condensation,玻色-爱因斯坦凝聚,通俗来说是spin自旋数为整数的粒子在极低温和external potential外加势场下collapse塌缩或者说condense凝聚到同一个ground state基态的现象)imaging有关的东西,另一个人做的是原子分子的光谱,由于细化方向的不同,那这两个AMO物理学家碰到一起听不懂对方的话也不是不可能。

最后来回答这个问题,我究竟学的什么东西?我现在的细化方向属于precision measurement。简单来说,就是比如N年前全世界最准的钟是Cs atomic clock铯原子钟,误差只存在于30,0000年后的一秒;现在新研发的Rb atomic clock 铷原子钟可以做到误差小于200百万年后的一秒。我做的就是如何用AMO的方法来令各种测试做到更准更好甚至成本更低更简单。对,听起来非常无聊,就像是奥运会上不断刷新数字的感觉。但我的目的不在于如何令“这件事情"做得更好,而是如何把这件事情做好的技术糅合到其他更为fundamental基本物理探索的collaboration合作中去,如何通过发现更精确更好的方法来让原本条件限制不可能做到的事情成为可能,所以数字刷新本身可能并没有多大意义,但是如何做到让数字刷新却有着大用途。

嗯,还是没有写到小何得哲学境界。看看怎么修改再说。

仅以此文献给小何等一众科研道路上的同伴。


Monday, October 20, 2008

supervisor found

Eventually found a supervisor. 

A risky fun choice vs. a safe not so interesting choice, both sides are great advisors.  I take the risk and challenge. 

Next task, building a Littrow-type external-cavity diode laser.


Thursday, October 09, 2008

振作

自己选择的路要由自己承担后果。
曾经作出的决定和相应的努力,不应因为旁人的主观看法而对自己的价值产生动摇,虽然伴随着巨大的遗憾和愤恨,但我还是不后悔,也不想去怨恨谁,只能说,“残念”。即使谁不认同,我也不在乎。
人生在世,就需要这种态度,需要这种豪气。新的生活已经开始,新的选择也即将出现。
人生得意须尽欢,莫使金樽空对月。天生我材必有用,千金散尽还复来。青莲居士的词不论何时都是如此令人振奋。鸿鹄怎会甘居燕雀囹圄之尴尬!突然想起另一首:

弃我去者,昨日之日不可留;
乱我心者,今日之日多烦忧。
长风万里送秋雁,对此可以酣高楼。
蓬莱文章建安骨,中间小谢又清发。
俱怀逸兴壮思飞,欲上青天揽明月。
抽刀断水水更流,举杯浇愁愁更愁。
人生在世不称意,明朝散发弄扁舟。

我虽无散发弄扁舟的愁绪,却也有失意落魄之时;但只要待到大风骤起之时,九万里一鼓作气扶摇直上也指日可待。


Friday, September 26, 2008

life in boulder

School has techinically started for weeks.  Everything is well settled, almost.  But real life starts now.  Have to be up to the challenge next week.  I will get it.



Next 5 >>