Why can an aarch64 ELF executable be run on an x86_64 machine?

I compiled a simple "Hello World" C program on Raspberry Pi 3, which was then transferred to an AMD64 laptop. Out of curiosity, I executed it, and it runs even though I did not expect it to:

$ uname -a
Linux 15ud490-gx76k 6.5.0-25-generic #25~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Tue Feb 20 16:09:15 UTC 2 x86_64 x86_64 x86_64 GNU/Linux

$ file hello64
hello64: ELF 64-bit LSB executable, ARM aarch64, version 1 (GNU/Linux), statically linked, BuildID[sha1]=486ee1cde035cd704b49c037a32fb77239b6a1c2, for GNU/Linux 3.7.0, not stripped

$ ./hello64
Hello World!

Like that, how can it execute? QEMU User Emulation is installed, but I don't know whether it is playing a part in this or not.