Stasis field is the common term for an artificially created barrier which is impervious to all known forms of matter and energy. In form, the field always encloses a volume of space and has a contiguous exterior. There is no known way to “leave a window open” in one. Anything contained within a stasis field is entirely cut off from the surrounding universe. Time stands still from the point of view of an outside observer. Also, the inertial state of objects within are unaffected by external events. A field can be subjected to acceleration/deceleration without its contents being affected in the least. Interestingly, a stasis field will not work inside of another stasis field, the contained field collapses automatically.
Despite its obvious utility, the stasis field’s practical applications remain limited. Current science is unable to create a stable field much more than one-third of a cubic meter in volume and even that requires a great deal of power. (It would drain a standard power backpack in ten minutes). They remain semi-custom devices which are built individually and therefore tend to be rather expensive. Rumors persist that technology yielding a larger stable field has been developed but this has yet to be publicly confirmed.
Stasis fields are used in scientific research into the nature of space-time and to contain hazardous, fragile and/or perishable objects.