Atomic interactions for qubit-error compensations

Abstract

Experimental imperfections induce phase and population errors in quantum systems. We present a method to compensate unitary errors affecting also the population of the qubit states. This is achieved through the interaction of the target qubit with an additional control qubit. We show that our approach works well for single-photon and two-photon excitation schemes. In the first case, we study two reduced models (i) a two-level system in which the interaction corresponds to an effective level shift and (ii) a three-level one describing two qubits in the Bell triplet subspace. In the second case, instead, a double-STIRAP process is presented with comparable compensation efficiency with respect to the single-photon case.

Version 2, comments are very welcome

References in corpus (8)

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• Coherent dipole-dipole coupling between two single atoms at a Förster resonance
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• Geometric phase gates based on stimulated Raman adiabatic passage in tripod systems
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Cited by in corpus (4)

• Toffoli gate based on a three-body fine-structure-state-changing Förster resonance in Rydberg atoms
• Comparison of Two Optimization Methods for a Rydberg Quantum Gate
• Reversing adiabatic state preparation in few-level quantum systems
• Symmetric $C_Z$ gate for ultracold neutral atoms based on counterdiabatic driving at Rydberg excitation