Article
Optics
T. Tassis, F. L. Semiao
Summary: Trapped ions driven by electromagnetic radiation are highly developed quantum technologies, ranging from proof-of-principle experiments to on-chip integration for quantum information units. With novel trap and cavity designs, faster quantum gates and state transfers become possible. However, there is currently limited knowledge on models and applications that go beyond the weak-driving scenario.
Article
Physics, Multidisciplinary
Wentao Chen, Yao Lu, Shuaining Zhang, Kuan Zhang, Guanhao Huang, Mu Qiao, Xiaolu Su, Jialiang Zhang, Jing-Ning Zhang, Leonardo Banchi, M. S. Kim, Kihwan Kim
Summary: A minimal-loss programmable phononic network is demonstrated, which can deterministically prepare and detect any phononic state. The network can be extended to reveal quantum advantage and has high reconstruction fidelities for both single- and two-phonon states.
Article
Physics, Multidisciplinary
Yotam Shapira, Sapir Cohen, Nitzan Akerman, Ady Stern, Roee Ozeri
Summary: In this study, we enhance the fidelity and robustness of entangling gates in quantum computers by introducing spin-dependent squeezing.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Jacob Whitlow, Zhubing Jia, Ye Wang, Chao Fang, Jungsang Kim, Kenneth R. Brown
Summary: This article presents a quantum simulation of conical intersections using a trapped atomic ion system, and experimentally observes the manifestation of geometric phase, demonstrating the advantage of combining spin and motion for quantum simulation of chemical reactions.
Article
Multidisciplinary Sciences
O. P. de Sa Neto, H. A. S. Costa, G. A. Prataviera, M. C. de Oliveira
Summary: In this study, estimation theory is applied to a system consisting of two interacting trapped ions. A simple scheme is introduced using the Fisher matrix formalism to estimate the temperature of the longitudinal vibrational modes of the ions. The interaction between the ions is utilized to effectively infer the temperature of individual ions by optimizing the interaction time evolution and measuring only one of the ions. The effect of a non-thermal reservoir on the inference approach is also investigated.
SCIENTIFIC REPORTS
(2022)
Article
Optics
Andrea Rodriguez-Blanco, K. Birgitta Whaley, Alejandro Bermudez
Summary: The idea of using maximally entangled states as a resource is crucial for various quantum information processing modalities, but the quality of these states as a resource can degrade due to imperfections during their preparation. We propose a low-overhead protocol to reverse this degradation by filtering out a specific type of noise relevant to many quantum technologies. We present two trapped-ion schemes to implement a nonunitary probabilistic filter against amplitude damping noise, thereby protecting maximally entangled pairs from spontaneous photon scattering during or after the entangling gates.
Article
Physics, Multidisciplinary
Aleksandrina Kirkova, Weibin Li, Peter A. Ivanov
Summary: In this study, an adiabatic method using trapped ions for phonon temperature estimation beyond the Lamb-Dicke regime is proposed. The technique relies on time-dependent red-sideband transitions and collective spin-degree of freedom to transfer information on phonon thermal distributions for temperature estimation. The temperature uncertainty is characterized in terms of Fisher information, showing that state projection measurement saturates the fundamental quantum Cramer-Rao bound for a quantum oscillator at thermal equilibrium.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Quantum Science & Technology
W. Morong, K. S. Collins, A. De, E. Stavropoulos, T. You, C. Monroe
Summary: An external drive is used to enhance coherence in a quantum many-body system and explore models not accessible in the static limit. The potential of combining these tools has not been fully explored. We develop a pulse sequence that decouples a quantum many-body system from an external field without affecting the intended dynamics. Experimental demonstration on an iontrap platform shows significant improvement in real-world coherence applications. Additionally, we engineer an approximate quantum simulation of the Haldane-Shastry model, expanding and unifying the quantum simulation toolbox.
Article
Optics
J. D. Arias Espinoza, M. Mazzanti, K. Fouka, R. X. Schuessler, Z. Wu, P. Corboz, R. Gerritsma, A. Safavi-Naini
Summary: The proposed method uses optical tweezers to engineer the sound-wave spectrum of trapped ion crystals, allowing for tuning of interactions and connectivity beyond current setups. Demonstrated feasibility of generating target spin-spin interaction patterns in both one- and two-dimensional crystals using realistic tweezer settings and experimentally relevant trap parameters. This approach advances quantum simulation in trapped-ion platforms by enabling realization of a broader family of quantum spin Hamiltonians.
Article
Optics
B. P. Ruzic, T. A. Barrick, J. D. Hunker, R. J. Law, B. K. McFarland, H. J. McGuinness, L. P. Parazzoli, J. D. Sterk, J. W. Van der Wall, D. Stick
Summary: In this paper, the impact of coherent motional excitation on the entangling-gate error in trapped-ion quantum computers is analyzed. The results show that a small amount of coherent displacement can erode gate performance, but this error can be suppressed by adjusting the relative phase or using Walsh modulation. Experimental data from transported ions is also used to analyze the impact of coherent displacement on gate error under realistic conditions.
Article
Optics
A. J. Rasmusson, Marissa D'Onofrio, Yuanheng Xie, Jiafeng Cui, Philip Richerme
Summary: A framework for calculating the fastest possible pulsed sideband cooling sequence was introduced and its improvement compared to traditional methods was verified. The ion's motional distribution was found to be distinctly nonthermal after cooling, making standard thermometry techniques unusable.
Article
Physics, Fluids & Plasmas
Sheng-Chen Liu, Lin Cheng, Gui-Zhong Yao, Ying-Xiang Wang, Liang-You Peng
Summary: Almost every quantum circuit in current stage relies on two-qubit gates, which are crucial for quantum computing in any platform. In trapped-ion systems, entangling gates based on Molmer-Sorensen schemes are widely used, utilizing the collective motional modes of ions and laser-controlled internal states as qubits. The key to achieving high-fidelity and robust gates is minimizing entanglement between qubits and motional modes under various sources of errors. In this work, an efficient numerical method is proposed to search for high-quality solutions for phase-modulated pulses, which solves the problem through a combination of linear algebra and quadratic equations. The method demonstrates effectiveness up to 60 ions and overcomes convergence issues, meeting the gate design needs in current trapped-ion experiments.
Article
Physics, Multidisciplinary
Yang Liu, Zhi-Cheng Shi, Jie Song, Yan Xia
Summary: The proposed scheme utilizes transitionless quantum driving (TQD) with trapped ions to efficiently generate multiparticle W states. By leveraging quantum Zeno dynamics and a large off-resonance condition, the scheme achieves high fidelity in state generation. Numerical simulations demonstrate the scheme's speed compared to other methods and its robustness against decoherence and operational imperfections.
ANNALEN DER PHYSIK
(2021)
Review
Physics, Multidisciplinary
C. Monroe, W. C. Campbell, L-M Duan, Z-X Gong, A. Gorshkov, P. W. Hess, R. Islam, K. Kim, N. M. Linke, G. Pagano, P. Richerme, C. Senko, N. Y. Yao
Summary: Laser-cooled and trapped atomic ions provide an ideal platform for simulating interacting quantum spin models. By using optical fields to modulate the ions' Coulomb interaction, long-range and tunable spin-spin interactions can be produced. This quantum simulator allows for the study of complex equilibrium states and dynamical processes in many-body interacting quantum systems.
REVIEWS OF MODERN PHYSICS
(2021)
Article
Quantum Science & Technology
Aleksandr Shlykov, Mikolaj Roguski, Stefan Willitsch
Summary: This study examines optimized strategies for the preparation of single molecular ions in well-defined rotational quantum states in an ion trap with the example of the molecular nitrogen ion N2+$_2<^>+$. It proposes a two-step approach of threshold-photoionization and measurement-based state purification to produce ground-state N2+$_2<^>+$ ions. By discarding ions not in the target state, state-pure samples of single N2+$_2<^>+$ ions can be generated for further experiments.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Polymer Science
Guillermo Reyes, Maria Graciela Aguayo, Arturo Fernandez Perez, Timo Paeaekkoenen, William Gacitua, Orlando J. Rojas
Article
Chemistry, Physical
Judith Vergara-Figueroa, Serguei Alejandro-Martin, Hector Pesenti, Fabiola Cerda, Arturo Fernandez-Perez, William Gacitua
Article
Materials Science, Multidisciplinary
G. Cabello-Guzman, C. Caro-Diaz, A. Fernandez-Perez, G. E. Buono-Core, B. Chornik
Article
Biochemistry & Molecular Biology
Juliana Gonzalez-Sanmiguel, Carlos F. Burgos, Denisse Bascunan, Eduardo J. Fernandez-Perez, Nicolas Riffo-Lepe, Subramanian Boopathi, Arturo Fernandez-Perez, Catalina Bobadilla-Azocar, Wendy Gonzalez, Maximiliano Figueroa, Benjamin Vicente, Luis G. Aguayo
ACS CHEMICAL NEUROSCIENCE
(2020)
Article
Chemistry, Multidisciplinary
Maria Graciela Aguayo, Arturo Fernandez-Perez, Claudia Oviedo, Guillermo Reyes, Pablo Reyes-Contreras
Article
Materials Science, Multidisciplinary
A. Fernandez-Perez, C. Navarrete, R. Munoz, E. Baradit, M. Saavedra, G. Cabello-Guzman, W. Gacitua
Summary: The study investigates the impact of Al doping on the junction parameters of Ag/CdS:Al thin-film Schottky diodes, finding that Al content affects the crystal structure, optical properties, and electrical characteristics of CdS:Al films. Additionally, the study discusses the influence of Al doping on the junction parameters and performance of the diodes.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Multidisciplinary Sciences
J. Tapia, N. Vera, Joao Aguilar, M. Gonzalez, S. A. Sanchez, P. Coelho, C. Saavedra, J. Staforelli
Summary: Using dual time resolved membrane fluctuation spectroscopy, it was found that human red blood cell membrane fluctuation is dependent on d-glucose concentration, with mechanical parameters changing accordingly. Under different d-glucose concentrations, an increase in the fluctuation amplitude of the lipid bilayer was observed, along with a decrease in tension value, bending modulus, and fluidity.
SCIENTIFIC REPORTS
(2021)
Article
Physics, Multidisciplinary
Giovani E. Morales-Hernandez, Juan C. Castellanos, Jose L. Romero, Andrei B. Klimov
Summary: In this study, the semi-classical limit of the generalized SO(3) map is applied to represent variable-spin systems in a four-dimensional symplectic manifold, and the evolution terms of effective classical dynamics are approximated on T*S-2. By quantizing one of the classical variables using the asymptotic form of the star-product, a discretized version of the Truncated Wigner Approximation (TWA) is introduced. The analysis of two emblematic examples of quantum dynamics (rotor in an external field and two coupled spins) compares the results of exact, continuous, and discretized versions of TWA.
Article
Materials Science, Multidisciplinary
D. Herrera-Molina, J. E. Diosa, A. Fernandez-Perez, E. Mosquera-Vargas
Summary: Thin films of CdS and Al-doped CdS were deposited on glass substrates using a CBD technique, with structural analysis confirming hexagonal CdS structure and changes in crystallite size and morphology with Al content. Optical properties such as energy band gap and photoluminescence were altered by Al doping, leading to shifts in peak wavelengths.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Claudia Marcela Pacheco, Bustos A. Cecilia, Guillermo Reyes, Claudia Oviedo, A. Fernandez-Perez, Mhartyn Elso, Orlando J. Rojas
Summary: Waterborne coatings are environmentally friendly due to their ability to reduce the emission of volatile organic compounds, but they may have lower durability and protection compared to conventional coatings. Incorporating nanocellulose, titanium dioxide, and silica dioxide nanoparticles into waterborne varnishes can enhance the mechanical performance and stability of wooden surfaces.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Environmental Sciences
Mathias Seguel, Gonzalo Buono-Core, Arturo Fernandez-Perez, Luis Fernandez, Gerardo Cabello-Guzman
Summary: In this study, a novel method of photochemical deposition for synthesizing metal oxides was proposed. The results showed that the optical band gap and luminescent emissions of the photo-deposits decreased gradually with increasing CuO doping, indicating enhanced absorption towards visible light and reduced recombination of charge carriers. Furthermore, the insertion of CuO significantly improved the photocatalytic activity, leading to higher photodegradation efficiency of various dyes.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Judith Vergara-Figueroa, Oswaldo Erazo, Hector Pesenti, Paulina Valenzuela, Arturo Fernandez-Perez, William Gacitua
Summary: The study aimed to produce cellulose nanofibers (TMP-NF) from the thermomechanical pulp (TMP) of Radiata Pine using a one-step micro-grinding process. Comparison between TMP-NF and cellulose nanofibers (CNF) was conducted through morphological analysis, X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy with attenuated total reflection (FTIR-ATR). Films were developed from both TMP-NF and CNF, and their physical, surface, and mechanical properties were characterized. The results showed that TMP-NF had improved surface characteristics, while CNF exhibited higher mechanical properties. TMP-NF can be a promising material for biologically based nanocomposites due to its easy and rapid obtainment.
Article
Biochemistry & Molecular Biology
Raju Prasanna-Kumari, Daniela Herrera-Molina, Arturo Fernandez-Perez, Jesus E. Diosa, Edgar Mosquera-Vargas
Summary: CdS:Al thin films were prepared on a glass substrate by the CBD method and characterized by XRD, Raman spectroscopy, AFM, SEM, UV-vis and PL spectroscopies. XRD analysis confirmed a hexagonal structure with preferred (002) orientation in all samples. The crystallite size and surface morphology varied with aluminum content. Raman spectra showed LO vibrational modes and their overtones. The optical properties of CdS thin films were found to be influenced by the incorporation of aluminum.
Article
Materials Science, Multidisciplinary
A. Fernandez-Perez, R. Munoz, F. Vargas, C. Oviedo, G. Cabello, R. A. Zarate
Summary: CdS/PbS solar cells were synthesized using ammonia-free chemical bath deposition, with varying Al content and absorber layer thickness. It was found that Al doping decreases the conversion efficiency of the solar cells.
CHALCOGENIDE LETTERS
(2021)
Article
Engineering, Multidisciplinary
Edgar Mosquera, Jesus Diosa, Arturo Fernandez-Perez
INGENIERIA Y COMPETITIVIDAD
(2020)
