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2021•Physical Review AOpen access

Transmission-based tomography for spin qubits

Amritesh Sharma, Ashwin A. Tulapurkar

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Abstract

We consider a system of static spin qubits embedded in a one-dimensional spin-coherent channel and develop a scheme to readout the state of one and two qubits separately. We use unpolarized flying qubits for this purpose that scatter off from the static qubits due to localized Heisenberg exchange interaction. Analyzing the transmission coefficient as a function of density matrix elements along with additional unitary gates we reconstruct the state of static qubits.

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We consider a system of static spin qubits embedded in a one-dimensional spin-coherent channel and develop a scheme to readout the state of one and two qubits separately. We use unpolarized flying qubits for this purpose that scatter off from the static qubits due to localized Heisenberg exchange interaction. Analyzing the transmission coefficient as a function of density matrix elements along with additional unitary gates we reconstruct the state of static qubits.

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Available abstract

We consider a system of static spin qubits embedded in a one-dimensional spin-coherent channel and develop a scheme to readout the state of one and two qubits separately. We use unpolarized flying qubits for this purpose that scatter off from the static qubits due to localized Heisenberg exchange interaction. Analyzing the transmission coefficient as a function of density matrix elements along with additional unitary gates we reconstruct the state of static qubits.

Key concepts: Qubit, Superconducting quantum computing, Unitary state, Physics, Transmission (telecommunications), Quantum mechanics, Spin (aerodynamics), Density matrix

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