# Two-Qubit Entanglement Generation through Non-Hermitian Hamiltonians Induced by Repeated Measurements on an Ancilla

@article{Grimaudo2020TwoQubitEG, title={Two-Qubit Entanglement Generation through Non-Hermitian Hamiltonians Induced by Repeated Measurements on an Ancilla}, author={Roberto Grimaudo and Antonino Messina and Alessandro Sergi and N V Vitanov and Sergey N. Filippov}, journal={Entropy}, year={2020}, volume={22} }

In contrast to classical systems, actual implementation of non-Hermitian Hamiltonian dynamics for quantum systems is a challenge because the processes of energy gain and dissipation are based on the underlying Hermitian system–environment dynamics, which are trace preserving. Recently, a scheme for engineering non-Hermitian Hamiltonians as a result of repetitive measurements on an ancillary qubit has been proposed. The induced conditional dynamics of the main system is described by the…

## 9 Citations

Multipartite Correlations in Quantum Collision Models

- PhysicsEntropy
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Quantum collision models have proved to be useful for a clear and concise description of many physical phenomena in the field of open quantum systems: thermalization, decoherence, homogenization,…

Spin‐Chain‐Star Systems: Entangling Multiple Chains of Spin Qubits

- PhysicsFortschritte der Physik
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We consider spin‐chain‐star systems characterized by N‐wise many‐body interactions between the spins in each chain and the central one. We show that such systems can be exactly mapped into standard…

Greenberger‐Horne‐Zeilinger‐state Generation in Qubit‐Chains via a Single Landau‐Majorana‐Stückelberg‐Zener π/2‐pulse

- PhysicsFortschritte der Physik
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A protocol for generating Greenberger‐Horne‐Zeilinger states in a system of N$N$ coupled qubits is proposed. The Hamiltonian model assumes N$N$ ‐wise interactions between the N$N$ qubits and the…

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- PhysicsEntropy
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The results reveal that the model parameters cause significant variations in the predicted QMA-EUR, and the entropy mixedness can be a proper indicator of the nature of the entropic uncertainty.

Entanglement Robustness in Trace Decreasing Quantum Dynamics

- PhysicsQuanta
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Trace decreasing dynamical maps are as physical as trace preserving ones; however, they are much less studied. Here we overview how the quantum Sinkhorn theorem can be successfully applied to find a…

Trace decreasing quantum dynamical maps: Divisibility and entanglement dynamics

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- 2021

Trace decreasing quantum operations naturally emerge in experiments involving postselection. However, the experiments usually focus on dynamics of the conditional output states as if the dynamics…

Effective protection of quantum coherence by a non-Hermitian driving potential

- Materials Science, EducationPhysical Review A
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Kai-Qian Huang, 2 Wen-Lei Zhao, ∗ and Zhi Li † 1 School of Science, Jiangxi University of Science and Technology, Ganzhou 341000, China 2 Guangdong Provincial Key Laboratory of Quantum Engineering…

Evolution of a Non-Hermitian Quantum Single-Molecule Junction at Constant Temperature

- PhysicsEntropy
- 2021

A model for a non-Hermitian quantum single-molecule junction (nHQSMJ) is introduced and it is found that the combined action of probability losses and thermal fluctuations assists quantum transport through the molecular junction.

Quantized-Energy Equation for N-Level Atom in the Probability Representation of Quantum Mechanics

- Physics
- 2020

For Hermitian and non-Hermitian Hamiltonian matrices H, we present the Schr¨odinger equation for qudit (spin-j system, N-level atom) with the state vector |ψ〉 in a new form of the linear eigenvalue…

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