{"title":"Generation of Nonmaximally Entangled States between BECs with Quantum Optimal Control Methods","authors":"I. D. Lazarev, A. N. Pyrkov","doi":"10.1134/s1063739723600553","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In the last decade, different theoretical methods for entanglement generation between distant BEC qubits (macroscopic cold atomic ensembles) were proposed. However, experimental realization of such states is still challenging beside some special cases. The most theoretically investigated entangled states between macroscopic BECs are nonmaximally entangled states obtained with <span>\\(SzSz\\)</span> entangling Hamiltonian. With the use of such states, the protocols for quantum teleportation, remote state preporation and many others were developed for macroscopic qubits on the basis of BECs. Here we show that it is possible to obtain such states with the use of the bosonic analog of <span>\\(XY\\)</span> Hamiltonian and the methods of quantum optimal control. We compare performance of this scheme in the meaning of fidelity and entanglement for different drift and control Hamiltonians. We use the well-established QuTip open python library for all calculations.</p>","PeriodicalId":21534,"journal":{"name":"Russian Microelectronics","volume":"14 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Microelectronics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1134/s1063739723600553","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Engineering","Score":null,"Total":0}
引用次数: 0
Abstract
In the last decade, different theoretical methods for entanglement generation between distant BEC qubits (macroscopic cold atomic ensembles) were proposed. However, experimental realization of such states is still challenging beside some special cases. The most theoretically investigated entangled states between macroscopic BECs are nonmaximally entangled states obtained with \(SzSz\) entangling Hamiltonian. With the use of such states, the protocols for quantum teleportation, remote state preporation and many others were developed for macroscopic qubits on the basis of BECs. Here we show that it is possible to obtain such states with the use of the bosonic analog of \(XY\) Hamiltonian and the methods of quantum optimal control. We compare performance of this scheme in the meaning of fidelity and entanglement for different drift and control Hamiltonians. We use the well-established QuTip open python library for all calculations.
期刊介绍：
Russian Microelectronics covers physical, technological, and some VLSI and ULSI circuit-technical aspects of microelectronics and nanoelectronics; it informs the reader of new trends in submicron optical, x-ray, electron, and ion-beam lithography technology; dry processing techniques, etching, doping; and deposition and planarization technology. Significant space is devoted to problems arising in the application of proton, electron, and ion beams, plasma, etc. Consideration is given to new equipment, including cluster tools and control in situ and submicron CMOS, bipolar, and BICMOS technologies. The journal publishes papers addressing problems of molecular beam epitaxy and related processes; heterojunction devices and integrated circuits; the technology and devices of nanoelectronics; and the fabrication of nanometer scale devices, including new device structures, quantum-effect devices, and superconducting devices. The reader will find papers containing news of the diagnostics of surfaces and microelectronic structures, the modeling of technological processes and devices in micro- and nanoelectronics, including nanotransistors, and solid state qubits.
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