Background

The Philosophy of Enter separates destructive readout from quantum return, and channel descriptions from thermodynamic or geometric identifications. An interface must specify its input, accessible systems, returned output, retained references, and permitted continuations CheungPhilosophy.

In the Enter calculus, a runtime qubit name grants access to a tensor factor. Destructive Enter consumes the measured name and returns a classical record. The Born instrument is a declared semantics; the operational characterization of that semantics is a separate result within a specified strategy class CheungEnter,CheungI. This manuscript does not rederive measurement probabilities from wormhole terminology.

The mathematical setting here is ordinary finite-dimensional quantum theory. Enter contributes the discipline of stating access and return types explicitly. Entanglement, scrambling, release, decoding, and communication are additional resources, not consequences of naming an operation.

The geometric ER $=$ EPR proposal and gravitational traversability constructions concern additional geometric and dynamical data MaldacenaSusskind,GaoJafferisWall,MaldacenaStanfordYang. They motivate comparisons, but provide no automatic dictionary for the finite factors used here.