Article
Quantum Science & Technology
Matthew L. Day, Kaushal Choonee, Zachary Chaboyer, Simon Gross, Michael J. Withford, Alastair G. Sinclair, Graham D. Marshall
Summary: The study combines arrays of fibers, 3D laser-written waveguides, and diffractive microlenses to demonstrate a micro-optic interconnect suitable for large-scale quantum information processors based on trapped ions. The module can guide ten independent laser beams to illuminate spatially separated target points, with low crosstalk intensities and average insertion loss.
QUANTUM SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Yu Dian Lim, Hong Yu Li, Peng Zhao, Jing Tao, Luca Guidoni, Chuan Seng Tan
Summary: Silicon photonics structures for optical addressing of trapped ions in quantum computing applications were developed in this study. Grating-waveguide-grating structures of various designs were fabricated, with gratings of 25 and 30 mu m radius of curvature showing lower power loss and better-focused beam profiles compared to those with 12 and 15 mu m radius of curvature. The beam width ranged between 17.31 to 41.54 mu m, allowing for optical addressing of 2 to 4 Sr+ ions trapped along the ground electrode of the ion trap.
IEEE PHOTONICS JOURNAL
(2021)
Article
Physics, Applied
W. J. Setzer, M. Ivory, O. Slobodyan, J. W. Van der Wall, L. P. Parazzoli, D. Stick, M. Gehl, M. G. Blain, R. R. Kay, H. J. McGuinness
Summary: This study demonstrates fluorescence detection from a trapped ion using SPADs integrated with a microfabricated surface ion trap. High fidelity detection of Yb-174(+) ions is achieved, with a low dark count rate of 1.2 kcps. The fidelity is limited by laser scatter, dark counts, and heating effects on the ion position.
APPLIED PHYSICS LETTERS
(2021)
Article
Multidisciplinary Sciences
M. Bohman, V. Grunhofer, C. Smorra, M. Wiesinger, C. Will, M. J. Borchert, J. A. Devlin, S. Erlewein, M. Fleck, S. Gavranovic, J. Harrington, B. Latacz, A. Mooser, D. Popper, E. Wursten, K. Blaum, Y. Matsuda, C. Ospelkaus, W. Quint, J. Walz, S. Ulmer
Summary: The article introduces a new method to cool a single proton efficiently by resonantly coupling laser-cooled Be+ ions through a superconducting LC circuit. The application of this technique also helps to improve the precision of matter-antimatter comparisons and drive the exploration of dark matter.
Article
Physics, Multidisciplinary
Markus Teller, Dario A. Fioretto, Philip C. Holz, Philipp Schindler, Viktor Messerer, Klemens Schueppert, Yueyang Zou, Rainer Blatt, John Chiaverini, Jeremy Sage, Tracy E. Northup
Summary: This study introduces a method to predict the impact of dielectric materials on the motion of trapped ions, and demonstrates quantitative agreement between a model without free parameters and measurements of trapped ions near dielectric mirrors. This approach is expected to optimize the design of ion-trap-based quantum computers and network nodes.
PHYSICAL REVIEW LETTERS
(2021)
Correction
Multidisciplinary Sciences
Karan K. Mehta, Chi Zhang, Maciej Malinowski, Thanh-Long Nguyen, Martin Stadler, Jonathan P. Home
Summary: A correction to the paper has been published and can be accessed at the provided link.
Article
Chemistry, Multidisciplinary
Quanbo Jiang, Prithu Roy, Jean-Benoit Claude, Jerome Wenger
Summary: In this research, plasmonic nanoantennas were used to trap single colloidal quantum dots and enhance their photoluminescence without the need for further processing, achieving precise positioning of the quantum emitter at the nanoantenna hotspot. The dedicated nanoantenna design exhibited high trap stiffness for quantum dot trapping and relatively low trapping power, resulting in significantly improved emission characteristics of the single quantum dot.
Article
Multidisciplinary Sciences
Pavel Hrmo, Benjamin Wilhelm, Lukas Gerster, Martin W. van Mourik, Marcus Huber, Rainer Blatt, Philipp Schindler, Thomas Monz, Martin Ringbauer
Summary: Quantum information carriers naturally occupy high-dimensional Hilbert spaces, and high-dimensional (qudit) quantum systems are becoming a powerful resource for quantum processors. Generating the desired interaction efficiently in these systems is crucial. In this study, the authors demonstrate the implementation of a native two-qudit entangling gate up to dimension 5 in a trapped-ion system. They use a light-shift gate mechanism to generate genuine qudit entanglement in a single application of the gate, which seamlessly adapts to the local dimension of the system with a calibration overhead independent of the dimension. Native entangling techniques for qudits are important for encoding quantum information.
NATURE COMMUNICATIONS
(2023)
Article
Instruments & Instrumentation
S. Doerscher, N. Huntemann, R. Schwarz, R. Lange, E. Benkler, B. Lipphardt, U. Sterr, E. Peik, C. Lisdat
Summary: The study reports direct measurements of the frequency ratio between different atomic species with unprecedented accuracy, but long-term variations remain unexplained. The fractional uncertainty in the frequency ratio has significantly improved, providing an important foundation for future experiments and research.
Article
Multidisciplinary Sciences
J. M. Pino, J. M. Dreiling, C. Figgatt, J. P. Gaebler, S. A. Moses, M. S. Allman, C. H. Baldwin, M. Foss-Feig, D. Hayes, K. Mayer, C. Ryan-Anderson, B. Neyenhuis
Summary: The QCCD proposal outlines a blueprint for a universal quantum computer using mobile ions as qubits, limiting quantum interactions to small ion crystals to maintain low error rates demonstrated in small experiments. The integration of necessary elements into a programmable trapped-ion quantum computer has led to the realization of a teleported CNOT gate with negligible crosstalk error and high quantum volume, showing the potential for high-performance quantum computers.
Article
Optics
R. T. Sutherland, R. Srinivas, D. T. C. Allcock
Summary: We propose a scheme for individual addressing of trapped ion qubits based on their motional frequency. We demonstrate that geometric phase gates can be achieved by the coherent interference of spin-independent and (global) spin-dependent forces. We show analytically and numerically that the use of spin-independent forces generated by localized electric fields can increase gate speed and reduce sensitivity to motional decoherence. Numerical simulations of a laser-free implementation show cross-talk errors below 10-6 for reasonable parameters.
Article
Engineering, Electrical & Electronic
David Benedicto, Antonio Dias, Juan Carlos Martin, Juan-Antonio Valles, Javier Solis
Summary: A new methodology for characterizing active multicore waveguides is proposed, suitable for various types of structures. Characterization of two-core and single-core waveguides allows for determination of material properties and refractive index variations. The validity of the characterization method is supported by experimental and simulation results.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Physics, Multidisciplinary
D. Pijn, O. Onishchenko, J. Hilder, U. G. Poschinger, F. Schmidt-Kaler, R. Uzdin
Summary: The utility of global passivity and passivity deformation frameworks for detecting coupling to a hidden environment has been experimentally demonstrated. Global passivity can verify the presence of a heat leak, not detectable by a microscopic equivalent of the second law of thermodynamics, while passivity deformation allows for even more sensitive detection of heat leaks, detecting a heat leak with an error margin of 5.3 standard deviations in a scenario where other tests fail.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Eli Chertkov, Justin Bohnet, David Francois, John Gaebler, Dan Gresh, Aaron Hankin, Kenny Lee, David Hayes, Brian Neyenhuis, Russell Stutz, Andrew C. Potter, Michael Foss-Feig
Summary: An experiment with a trapped-ion quantum processor demonstrates the efficient simulation of the evolution of infinite entangled states using holographic technique and quantum tensor-network methods. The results show excellent quantitative agreement with theoretical predictions, indicating the potential of practical quantum computational advantage in science and technology.
Article
Optics
Qian Yu, Alberto M. Alonso, Jackie Caminiti, Kristin M. Beck, R. Tyler Sutherland, Dietrich Leibfried, Kayla J. Rodriguez, Madhav Dhital, Boerge Hemmerling, Hartmut Haffner
Summary: We investigate the feasibility of using electrons in a linear Paul trap as qubits in a future quantum computer. Through a concrete design proposal, we discuss the necessary experimental steps and conduct numerical simulations to evaluate the performance of such a device.
Article
Quantum Science & Technology
M. G. Blain, R. Haltli, P. Maunz, C. D. Nordquist, M. Revelle, D. Stick
Summary: The growing interest in engineering quantum computers has driven significant research on the technologies needed for manufacturability and scalability. In the ion trap realm, there is a transition to chip-based traps, with increasing demand for ions and advancements in integrated components. Further research is needed to overcome limitations and accommodate the demands of NISQ scale ion traps integrated with additional technologies.
QUANTUM SCIENCE AND TECHNOLOGY
(2021)
Article
Optics
Galan Moody, Volker J. Sorger, Daniel J. Blumenthal, Paul W. Juodawlkis, William Loh, Cheryl Sorace-Agaskar, Alex E. Jones, Krishna C. Balram, Jonathan C. F. Matthews, Anthony Laing, Marcelo Davanco, Lin Chang, John E. Bowers, Niels Quack, Christophe Galland, Igor Aharonovich, Martin A. Wolff, Carsten Schuck, Neil Sinclair, Marko Loncar, Tin Komljenovic, David Weld, Shayan Mookherjea, Sonia Buckley, Marina Radulaski, Stephan Reitzenstein, Benjamin Pingault, Bartholomeus Machielse, Debsuvra Mukhopadhyay, Alexey Akimov, Aleksei Zheltikov, Girish S. Agarwal, Kartik Srinivasan, Juanjuan Lu, Hong X. Tang, Wentao Jiang, Timothy P. McKenna, Amir H. Safavi-Naeini, Stephan Steinhauer, Ali W. Elshaari, Val Zwiller, Paul S. Davids, Nicholas Martinez, Michael Gehl, John Chiaverini, Karan K. Mehta, Jacquiline Romero, Navin B. Lingaraju, Andrew M. Weiner, Daniel Peace, Robert Cernansky, Mirko Lobino, Eleni Diamanti, Luis Trigo Vidarte, Ryan M. Camacho
Summary: Integrated photonics is crucial for the large-scale integration of quantum systems, enabling programmable quantum information processing, chip-to-chip networking, hybrid quantum system integration, and high-speed communications.
JOURNAL OF PHYSICS-PHOTONICS
(2022)
Article
Physics, Applied
W. J. Setzer, M. Ivory, O. Slobodyan, J. W. Van der Wall, L. P. Parazzoli, D. Stick, M. Gehl, M. G. Blain, R. R. Kay, H. J. McGuinness
Summary: This study demonstrates fluorescence detection from a trapped ion using SPADs integrated with a microfabricated surface ion trap. High fidelity detection of Yb-174(+) ions is achieved, with a low dark count rate of 1.2 kcps. The fidelity is limited by laser scatter, dark counts, and heating effects on the ion position.
APPLIED PHYSICS LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Sylvain D. Gennaro, Chloe F. Doiron, Nicholas Karl, Prasad P. Iyer, Darwin K. Serkland, Michael B. Sinclair, Igal Brener
Summary: In this study, we demonstrate the existence of cascaded second-order optical nonlinearities by analyzing second- and third-wave mixing from a highly nonlinear metasurface. We find that the third-wave mixing signal from the cascaded process can be comparable in strength to that from conventional third-harmonic generation, and surface nonlinearities are the dominant mechanism contributing to cascaded second-order nonlinearities in our metasurface.
Article
Multidisciplinary Sciences
Shai Gertler, Nils T. Otterstrom, Michael Gehl, Andrew L. Starbuck, Christina M. Dallo, Andrew T. Pomerene, Douglas C. Trotter, Anthony L. Lentine, Peter T. Rakich
Summary: The growing demand for bandwidth has made photonic systems a leading candidate for future telecommunication and radar technologies. However, it remains challenging to realize narrowband filters needed for high-performance communications systems using integrated photonics. In this study, the authors demonstrate all-silicon microwave-photonic notch filters with significantly higher spectral resolution by utilizing optomechanical interactions to access long-lived phonons in silicon.
NATURE COMMUNICATIONS
(2022)
Article
Quantum Science & Technology
Jonathan D. Sterk, Henry Coakley, Joshua Goldberg, Vincent Hietala, Jason Lechtenberg, Hayden McGuinness, Daniel McMurtrey, L. Paul Parazzoli, Jay Van der Wall, Daniel Stick
Summary: Fast and low-motional-excitation ion shuttling is crucial for achieving fast and high-fidelity algorithms in trapped-ion-based quantum computing architectures. In this study, closed-loop optimization of voltage waveforms is implemented to control the trajectory and frequency of an ion during transport, resulting in fast round-trip ion transport with minimum motional excitation.
NPJ QUANTUM INFORMATION
(2022)
Article
Multidisciplinary Sciences
Jongmin Lee, Roger Ding, Justin Christensen, Randy R. Rosenthal, Aaron Ison, Daniel P. Gillund, David Bossert, Kyle H. Fuerschbach, William Kindel, Patrick S. Finnegan, Joel R. Wendt, Michael Gehl, Ashok Kodigala, Hayden McGuinness, Charles A. Walker, Shanalyn A. Kemme, Anthony Lentine, Grant Biedermann, Peter D. D. Schwindt
Summary: The extreme miniaturization of a cold-atom interferometer accelerometer requires the development of novel technologies and architectures. Researchers have successfully demonstrated a compact cold-atom interferometer using microfabricated gratings and discussed the possible use of photonic integrated circuits.
NATURE COMMUNICATIONS
(2022)
Article
Engineering, Manufacturing
Nicholas A. Boynton, Forrest G. Valdez, Thomas A. Friedmann, Shawn C. Arterburn, Christina M. Dallo, Andrew T. Pomerene, Andrew L. Starbuck, Douglas C. Trotter, Michael R. Gehl, Christopher T. DeRose, Shayan Mookherjea, Anthony L. Lentine
Summary: This article discusses and demonstrates a method of patterning the ground planes of RF waveguides to achieve a more uniform distribution of embedded metal density, thereby providing a more uniform planarization process. This is crucial for high-volume manufacturing of these technologies.
IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY
(2022)
Article
Quantum Science & Technology
C. W. Hogle, D. Dominguez, M. Dong, A. Leenheer, H. J. McGuinness, B. P. Ruzic, M. Eichenfield, D. Stick
Summary: Optical modulators are commonly used in experiments with trapped ions and neutral atoms to control light properties. However, these elements are expensive, bulky, and energy-consuming, which poses challenges for scalability. To overcome these issues, the integration of optical modulators with ion traps is necessary. In this study, we design, fabricate, and test an optical modulator that can be monolithically integrated with a surface-electrode ion trap. By using quantum tomography and multi-gate sequences, we enhance the sensitivity of fidelity measurement and achieve single qubit gate fidelities exceeding 99.7%.
NPJ QUANTUM INFORMATION
(2023)
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.
