2 papers
quant-ph2026
Can a spin-half particle ever give more than two spots in a Stern-Gerlach experiment? -- the subtle physics of effective Hamiltonians
Noah Linden, Sandu Popescu, Anthony J. Short
We show that a spin-1/2 particle can behave as if it were spin-, and generate spots in a Stern Gerlach measurement (albeit with a smaller gyromagnetic ratio). This arises…
quant-ph2025
The Hadamard gate cannot be replaced by a resource state in universal quantum computation
Benjamin D. M. Jones, Noah Linden, Paul Skrzypczyk
We consider models of quantum computation that involve operations performed on some fixed resourceful quantum state. Examples that fit this paradigm include magic state injection a…