The vacuum field. Separate and attached fields are not the only fields that exist in QFT. Even in a region where they are absent, or essentially zero, there still is a background field known as the vacuum field.
Rodney A. Brooks
The vacuum field. Separate and attached fields are not the only fields that exist in QFT. Even in a region where they are absent, or essentially zero, there still is a background field known as the vacuum field.