Using the no-signaling condition for constraining the nonidealness of a Stern-Gerlach setup

TL;DR

This paper demonstrates how the no-signaling condition can be used to constrain the nonidealness of a Stern-Gerlach setup, using solutions of the time-dependent Schrödinger equation in a generalized context.

Contribution

It introduces a novel method to derive constraints on Stern-Gerlach nonidealness using the no-signaling principle and exact quantum solutions.

Findings

No-signaling constrains nonidealness of SG setups.

Exact Schrödinger solutions inform the constraints.

Method applicable to general SG configurations.

Abstract

On the basis of a variant of the EPR-Bohm example, we show that the no-signaling condition can be employed as a useful tool for deriving a constraint on a suitably defined measure of the `nonidealness' of a Stern-Gerlach(SG) setup. In this demonstration, a key ingredient is provided by the characteristics of the exact solution of the time-dependent Schroedinger equation as applied to a most general SG setup.