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Quantum information processing with trapped Rydberg ions

Grant number: 21/10224-0
Support Opportunities:Scholarships abroad - Research Internship - Post-doctor
Effective date (Start): February 15, 2022
Effective date (End): February 14, 2023
Field of knowledge:Physical Sciences and Mathematics - Physics - Atomic and Molecular Physics
Principal Investigator:Romain Pierre Marcel Bachelard
Grantee:Alan Costa dos Santos
Supervisor: Markus Thomas Hennrich
Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Research place: Stockholm University, Sweden  
Associated to the scholarship:19/22685-1 - Memory effect and the transition from weak to strong disorder, BP.PD


We aim at exploring the properties of trapped Rydberg ions to study its potential for quantum information processing tasks. More specifically in this project we will focus on realistic schemes for quantum operations and their experimental realizations in a system of Strontium ($^{88}$Sr$^{+}$) ions. To this end, one needs to take into account the properties of $^{88}$Sr$^{+}$ ions when excited to electronic Rydberg states. By coherently manipulating Rydberg transition of such ions, we are interested in describing the effective two-qubit interactions in the system. As a first theoretical limitation to be bypassed, we will study strategies to enhance the two-qubit gate fidelity (currently of order of $80\%$), in which fidelities of order of $99\%$ are highly desirable. The methods developed will be experimentally verified in order to validate the method before applying it for multi-qubit gates. A system with more than 10 atomic ions is available as the current state-of-art of the trapped Rydberg ion experiment. The results of this project meets potential applications in different branches of quantum information science, from the development of new quantum devices to the processing and storing of quantum information. (AU)

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Scientific publications (7)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
POULSEN, KASPER; SANTOS, ALAN C.; ZINNER, NIKOLAJ T.. Quantum Wheatstone Bridge. Physical Review Letters, v. 128, n. 24, p. 6-pg., . (21/10224-0, 19/22685-1)
SANTOS, ALAN C.; BACHELARD, R.. Generation of Maximally Entangled Long-Lived States with Giant Atoms in a Waveguide. Physical Review Letters, v. 130, n. 5, p. 6-pg., . (19/13143-0, 21/10224-0, 19/22685-1, 18/15554-5)
SANTOS, ALAN C.; CIDRIM, ANDRE; VILLAS-BOAS, CELSO JORGE; KAISER, ROBIN; BACHELARD, ROMAIN. Generating long-lived entangled states with free-space collective spontaneous emission. HYSICAL REVIEW, v. 105, n. 5, p. 6-pg., . (18/15554-5, 19/22685-1, 19/13143-0, 21/10224-0, 17/09390-7, 19/11999-5)
HU, CHANG-KANG; QIU, JIAWEI; SOUZA, PAULO J. P.; YUAN, JIAHAO; ZHOU, YUXUAN; ZHANG, LIBO; CHU, JI; PAN, XIANCHUANG; HU, LING; LI, JIAN; et al. Optimal charging of a superconducting quantum battery. QUANTUM SCIENCE AND TECHNOLOGY, v. 7, n. 4, p. 15-pg., . (18/15554-5, 21/10224-0, 19/13143-0, 19/22685-1, 19/11999-5)
ARJMANDI, MOHAMMAD B.; MOHAMMADI, HAMIDREZA; SANTOS, ALAN C.. Enhancing self-discharging process with disordered quantum batteries. PHYSICAL REVIEW E, v. 105, n. 5, p. 8-pg., . (21/10224-0, 19/22685-1)
POULSEN, KASPER; SANTOS, ALAN C.; KRISTENSEN, LASSE B.; ZINNER, NIKOLAJ T.. Entanglement-enhanced quantum rectification. HYSICAL REVIEW, v. 105, n. 5, p. 12-pg., . (21/10224-0, 19/22685-1)

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