= Qubit stabilization by measurement feedback
An observed dissipative channel combined with direct feedback can create a modified <Lindblad operator> and a compensating <Quantum Hamiltonian>. Choosing those parameters can make a prescribed <pure state> stationary and globally attractive. At exceptional parameter values, the dissipator can instead leave an entire family of states stationary, so algebraic target stationarity does not establish stabilization. Checking the <Affine Bloch equation> and its transverse <eigenvalues> distinguishes these possibilities.
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