Remotely Controlled Entanglement Generation

Ferran Riera-Sàbat; Pavel Sekatski; Wolfgang Dür

doi:10.22331/q-2023-01-24-904

Remotely Controlled Entanglement Generation

Ferran Riera-Sàbat¹, Pavel Sekatski², and Wolfgang Dür¹

¹Universität Innsbruck, Institut für Theoretische Physik, Technikerstraße 21a, 6020 Innsbruck, Austria
²University of Geneva, Department of Applied Physics, 1211 Geneva, Switzerland

Published:	2023-01-24, volume 7, page 904
Eprint:	arXiv:2206.10686v2
Doi:	https://doi.org/10.22331/q-2023-01-24-904
Citation:	Quantum 7, 904 (2023).

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Abstract

We consider a system of multiple qubits without any quantum control. We show that one can mediate entanglement between different subsystems in a controlled way by adding a (locally) controlled auxiliary system of the same size that couples via an always-on, distant dependent interaction to the system qubits. Solely by changing the internal state of the control system, one can selectively couple it to selected qubits, and ultimately generate different kinds of entanglement within the system. This provides an alternative way for quantum control and quantum gates that does not rely on the ability to switch interactions on and off at will, and can serve as a locally controlled quantum switch where all entanglement patterns can be created. We demonstrate that such an approach also offers an increased error tolerance w.r.t. position fluctuations.

Featured image: An auxiliary control system (green) is used to control an inaccessible target system (red). By a proper choice of the internal state of the control system, one makes it selectively couple to the individual qubits of the target system and mediates an effective interaction

► BibTeX data

@article{RieraSabat2023remotelycontrolled,
  doi = {10.22331/q-2023-01-24-904},
  url = {https://doi.org/10.22331/q-2023-01-24-904},
  title = {Remotely {C}ontrolled {E}ntanglement {G}eneration},
  author = {Riera-S{\`{a}}bat, Ferran and Sekatski, Pavel and D{\"{u}}r, Wolfgang},
  journal = {{Quantum}},
  issn = {2521-327X},
  publisher = {{Verein zur F{\"{o}}rderung des Open Access Publizierens in den Quantenwissenschaften}},
  volume = {7},
  pages = {904},
  month = jan,
  year = {2023}
}

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Cited by

[1] Nahid Binandeh Dehaghani, A. Pedro Aguiar, and Rafal Wisniewski, 2025 11th International Conference on Control, Decision and Information Technologies (CoDIT) 1595 (2025) ISBN:979-8-3315-0338-3.

[2] Ferran Riera-Sàbat, Pavel Sekatski, and Wolfgang Dür, "A quantum simulator based on locally controlled logical systems", New Journal of Physics 25 2, 023001 (2023).

[3] Volkan Duran and Ferhat Taş, "Selective qubit entanglement via projective $$\Omega $$-product: algebraic framework and interactive visualization", Quantum Information Processing 25 8, 243 (2026).

[4] Ferran Riera-Sàbat, Pavel Sekatski, and Wolfgang Dür, "Quantum computation with logical gates between hot systems", Physical Review Research 6 3, 033101 (2024).

[5] Ferran Riera-Sàbat and Wolfgang Dür, "A modular entanglement-based quantum computer architecture", New Journal of Physics 26 12, 123015 (2024).

[6] Yunyan Lee, Ciann-Dong Yang, and Daoyi Dong, "Entanglement Measure-Based Sliding Mode Control for Quantum State Preparation", IEEE Transactions on Cybernetics 55 10, 4771 (2025).

[7] Nahid Binandeh Dehaghani, A. Pedro Aguiar, and Rafal Wisniewski, 2025 IEEE International Conference on Quantum Control, Computing and Learning (qCCL) 112 (2025) ISBN:978-1-6654-5782-8.

[8] Son-Hsien Chen, Seng Ghee Tan, and Ching-Ray Chang, "Navigating entanglement via Ruderman–Kittel–Kasuya–Yosida exchange: oscillatory, boundary-residing, pulsed, and damping-stabilized trajectories", Scientific Reports 16 1, 16942 (2026).

[9] Yuanbo Chen and Yoshihiko Hasegawa, "Fundamental trade-off relation in probabilistic entanglement generation", Physical Review A 113 2, 022431 (2026).

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