# D-brane analogue in ordinary QFT

I am reading David Tong's lectures on string theory and on the page 180 in chapter 7 of his lecture notes http://www.damtp.cam.ac.uk/user/tong/string.html : he claims that D-branes are something in between the fundamental strings, which tension is independent of $$g_s$$, and solitonic branes, whose tension scales as $$1/g_s^2$$. And he says then, that there is some analogue to D-brane in field theory, despite not so frequently mentioned. What does he actually mean?

• Are you referring to the domain walls in ordinary QFTs or have I misunderstood the question? Tong has done some work on it. See for example arxiv.org/abs/hep-th/0512192
– user172341
May 11, 2020 at 15:29
• Thanks! Now it sounds like and obvious canditate, nevertheless, thank you for the reference May 11, 2020 at 16:22
• Glad I was able to help :-)
– user172341
May 11, 2020 at 17:40