State Tomography of a Qubit through Scattering of a Probe Qubit

Abstract

We discuss the state tomography of a fixed qubit (a spin-1/2 target particle), which is in general in a mixed state, through 1D scattering of a probe qubit off the target. Two strategies are presented, by making use of different degrees of freedom of the probe, spin and momentum. Remarkably, the spatial degree of freedom of the probe can be useful for the tomography of the qubit.

7 pages, 5 figures

References in corpus (3)

• Entanglement of Two Impurities through Electron Scattering
• Entanglement Controlled Single-Electron Transmittivity
• Entanglement Generation by Qubit Scattering in Three Dimensions

Cited by in corpus (6)

• Quasideterministic realization of a universal quantum gate in a single scattering process
• Implementing quantum gates through scattering between a static and a flying qubit
• Generation of n-qubit W states using Spin Torque
• Transmission based tomography for spin qubits
• Selective writing and read-out of a register of static qubits
• Entanglement-assisted tomography of a quantum target