Steady-State Tunable Entanglement Switch with Quantum Dots

SV acknowledges support from a DST-SERB Early Career Research Award (ECR/2018/000957) and DST-QUEST grant number DST/ICPS/QuST/Theme-4/2019. BM acknowledges Science and Engineering Research Board (SERB), Government of India, Grant No. STR/2019/000030.

*We present a nanoscale device capable of non-deterministically producing maximal entanglement between two distant uncoupled ancilla qubits. A single quantum dot device with anti-parallel spin polarized leads coupled to two impurity spin qubits is shown to generate steady state entanglement between the two qubits. Steady states are obtained via application of Liouvillian superoperator theory for the entire dot-impurity system. The steady state entanglement between ancillary qubits is tunable and can be controlled by the applied voltage and other parameters. In the end, we provide a postselection scheme to generate maximal entanglement states out of the non-maximally entangled steady states of the system.

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Bulletin of the American Physical Society

APS March Meeting 2022

Volume 67, Number 3

Monday–Friday, March 14–18, 2022; Chicago

Session W39: Spin Qubit Arrays I

Abstract: W39.00012 : Steady-State Tunable Entanglement Switch with Quantum Dots*

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