One of the most striking things I’ve learned in the past couple of years of post-doctoral work has nothing to do with the lab. I’ve been learning about the cultural differences between different groups, as well as between different disciplines in physics. I spent seven years in graduate school, for most of which I was a research assistant in an atomic physics group. Then, I graduated and started a postdoc in a condensed matter group. And now, I’m back in atomic physics. And one of the major things I noticed was how different the scientific and investigative culture is between atomic and condensed matter. I’ve also had to adjust to specific differences particular to each group.
The first group I worked in was as a graduate student. The group was mostly graduate students with the advisor (a professor at the university) and an occasional handful of postdocs. I joined the group when the senior grad student had been there only for a few years, so we had several years together to bond as a group. We were a bit of a gang. We showed up to events at the department together, usually early so we were the first in line for food. We were generally social and outgoing. When we went to conferences, we were the ones bar-hopping and bringing beer back to someone’s room to play XBOX till the wee hours. And I don’t think it was just the students. When a new professor joined the group, I fielded a phone call from someone looking for my adviser because they were heading out to the bar. It calmed down a bit as certain key instigators left the group, but we always had an outgoing mindset in the group. We went out to lunch in a group (a herd of sorts) every Friday. We tried to institute a tradition in which when someone graduated, they had to go out to the bar after and have a drink for every year they spent in grad school.
After grad school, I slowly lost touch with a lot of the guys who had gotten out before I did. And then I joined another group. A quieter group. Culturally, we went out to lunch maybe once a year, usually to celebrate someone starting or leaving. When we went out to lunch on my first day, the other postdoc told me it was the first time he’d ever seen our boss eat out. We would occasionally go to a happy hour during a conference, but it was lower-key. And generally consisted of one drink each.
In my current position, I haven’t quite figured out the culture. Yes, we have a weekly group lunch, and I’ve already been invited to a social gathering in the first month of living there. But all the other postdocs have young children, so it seems unlikely we’ll be doing boilermakers or shotgunning beers.
Even more intriguing is the fact that atomic physicists and condensed matter physicists seem to approach physics differently. Moving from one to the other and back again showed me that. I spent the last two years in a very device-driven field. Conference talks and conversations tend to be about the current device, how you designed it, how you think you could do better. One group spent a year trying to replicate a particularly good device. Two groups square off against each other when one accuses the other of only showing data from “hero” devices — i.e., those that work the best — and ignoring the rest. While that is the general thrust of the field, to implement the best of a certain type of device, exploration of basic physics concepts seems to take a back seat to the product.
Then, a year and a half into this position, I started writing a proposal to get another postdoc in an atomic physics group. All of a sudden, I’m back to thinking about the Bloch sphere, and abstract concepts in quantum mechanics. It’s no longer just about the stuff you can do with your hands in the lab. The day-to-day involves a lot more conversations about fundamental concepts of quantum physics because that’s something atomic physicists aim to study. But apart from that, there’s a sense that you want to learn more than just what you do daily in the lab. You read papers about anything remotely related to quantum, not just papers about your specific project. It’s an attitude that I like a lot, which is why I returned.
But it was intimidating to realize that I’d have to go back to being as well-versed in the theory as the theorists. And that might give me a hangover more than all those Bud Lights at conferences.