ConferenceProceedings IEEE Quantum Week 2025 Qce 2025 · January 1, 2025
Quantum devices require precisely calibrated analog signals, a process that is complex and time-consuming. Many calibration strategies exist, and all require careful analysis and tuning to optimize system availability. To enable rigorous statistical evalua ...
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ConferenceProceedings IEEE Quantum Week 2024 Qce 2024 · January 1, 2024
Accurate calibration of control parameters in quan-tum gates is crucial for high-fidelity operations, yet it represents a significant time and resource challenge, necessitating periods of downtime for quantum computers. Robust Phase Estimation (RPE) [8] ha ...
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Conference2023 Conference on Lasers and Electro Optics CLEO 2023 · January 1, 2023
We explore sympathetic cooling as a mechanism to cool the motion of an ion chain without disturbing their qubit states. A narrow linewidth transition in a different isotope is used to implement the cooling process. ...
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ConferenceProceedings 2023 IEEE International Conference on Quantum Computing and Engineering Qce 2023 · January 1, 2023
Here, we propose a modular framework for representing and generating voltage solutions for near-term ion trap devices. Voltage graphs are separated into individual segments interconnected by shuttling paths through junctions managed by a Finite State Machi ...
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ConferenceCLEO Fundamental Science CLEO Fs 2023 · January 1, 2023
We explore sympathetic cooling as a mechanism to cool the motion of an ion chain without disturbing their qubit states. A narrow linewidth transition in a different isotope is used to implement the cooling process. ...
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ConferenceProceedings 2022 IEEE International Conference on Quantum Computing and Engineering Qce 2022 · January 1, 2022
Real-time control software and hardware is essential for operating quantum computers. In particular, the software plays a crucial role in bridging the gap between quantum programs and the quantum system. Unfortunately, current control software is often opt ...
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ConferenceOptics Infobase Conference Papers · January 1, 2020
We realize and characterize high fidelity Mølmer-Sørensen gates in chains of up to four 171Yb+ ions using radial modes. The individual qubits are controlled by two addressing beams, which are steered using micro-fabricated tilting mir ...
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ConferenceOptics Infobase Conference Papers · January 1, 2020
We present the hardware design of a trapped-ion quantum computer for 32 fully-connected 171Yb+ hyperfine qubits. The system is engineered for optomechanical stability to ensure high performance quantum gates utilizing a low vibration ...
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ConferenceOptics Infobase Conference Papers · January 1, 2019
We model the turn-on dynamics of superconducting nanowire single-photon detectors (SNSPDs), predicting that the rising edge of the readout signal encodes photon number, nanowire length and detector bias current, and experimentally verify these predictions. ...
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Conference2018 Conference on Lasers and Electro Optics CLEO 2018 Proceedings · August 6, 2018
We present the first experimental evidence of photon number resolution in a conventional superconducting nanowire single-photon detector. The photon-number-dependent resistance reflected in the rise-time of output pulses is detected using a wideband, low-n ...
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Conference2018 Conference on Lasers and Electro Optics CLEO 2018 Proceedings · August 6, 2018
We demonstrate theoretically that a conventional single-pixel superconducting nanowire single-photon detector can resolve photon number by sensing changes in the rising edge of the electrical readout pulse. ...
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Conference2018 Conference on Lasers and Electro Optics CLEO 2018 Proceedings · August 6, 2018
We realize a time-bin qudit-based quantum key distribution system that uses two-photon interference for measuring the phase-basis states, allowing us to generate a secret key at a megabits-per-second rate. ...
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ConferenceOptics Infobase Conference Papers · January 1, 2018
We realize a time-bin qudit-based quantum key distribution system that uses two-photon interference for measuring the phase-basis states, allowing us to generate a secret key at a megabits-per-second rate. ...
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ConferenceOptics Infobase Conference Papers · January 1, 2018
We present the first experimental evidence of photon number resolution in a conventional superconducting nanowire single-photon detector. The photon-number-dependent resistance reflected in the rise-time of output pulses is detected using a wideband, low-n ...
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ConferenceOptics Infobase Conference Papers · January 1, 2018
We demonstrate theoretically that a conventional single-pixel superconducting nanowire single-photon detector can resolve photon number by sensing changes in the rising edge of the electrical readout pulse. ...
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Conference2017 IEEE International Conference on Rebooting Computing Icrc 2017 Proceedings · November 28, 2017
We present progress on the construction and operation of a room-temperature quantum computer built with trapped atomic ion qubits. Based on the technological underpinnings of atomic clocks that define time, atomic qubits are standards of quantum informatio ...
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ConferenceInternational Conference on Optical MEMS and Nanophotonics · September 26, 2017
Practical-scale quantum computing using trapped atomic ions requires non-conventional integration technologies in mechanical and optical domains. We present the design and operation of our system where MEMS technology provides critical enabling components. ...
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ConferenceSummer Topicals Meeting Series Sum 2017 · August 17, 2017
Efficient long distance quantum communication with quantum repeaters is discussed. We show that quantum repeater protocols can be classified into three generations, each performs optimally in different parameter regimes. The application of cat codes as a s ...
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Conference2016 Conference on Lasers and Electro Optics CLEO 2016 · December 16, 2016
We demonstrate a setup for realizing a four-dimensional time-frequency quantum key distribution protocol, where discrete temporal states are secured using discrete frequency states. The high-dimensional frequency states are detected using a tree of passive ...
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Conference2016 Conference on Lasers and Electro Optics CLEO 2016 · December 16, 2016
We study an electrical readout scheme for superconducting nanowire single photon detectors using commercial off-the-shelf amplifiers operating at cryogenic temperatures. Low power consumption and improved noise performance enable multichannel readout circu ...
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ConferenceProceedings of SPIE the International Society for Optical Engineering · January 1, 2016
High-dimensional (dimension d > 2) quantum key distribution (QKD) protocols that encode information in the temporal degree of freedom promise to overcome some of the challenges of qubit-based (d = 2) QKD systems. In particular, the long recovery time of si ...
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ConferenceOptics Infobase Conference Papers · January 1, 2016
We demonstrate a setup for realizing a four-dimensional time-frequency quantum key distribution protocol, where discrete temporal states are secured using discrete frequency states. The high-dimensional frequency states are detected using a tree of passive ...
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ConferenceOptics Infobase Conference Papers · January 1, 2016
We study an electrical readout scheme for superconducting nanowire single photon detectors using commercial off-the-shelf amplifiers operating at cryogenic temperatures. Low power consumption and improved noise performance enable multichannel readout circu ...
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ConferenceInternational Conference on Optical MEMS and Nanophotonics · October 2, 2015
Scalability is one of the main challenges of trapped ion based quantum computation, partly limited by the ability to manipulate the increasing number of quantum bits (qubits). For individual addressing of qubits, microelectromechanical systems (MEMS) techn ...
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ConferenceProceedings Design Automation and Test in Europe Date · April 22, 2015
The hardware technology characterized by the device parameters (DPs) often drives the architectural optimization in a novel computer design such as the quantum computer. We highlight the role of DPs by quantifying the performance of a fully error-corrected ...
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ConferenceOptics Infobase Conference Papers · January 1, 2014
We present a scalable approach to quantum information processing utilizing trapped ions and photons. Ions trapped in microfabricated surface traps provide a practical platform for realizing quantum networks of distributed computing nodes and quantum repeat ...
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ConferenceOptics Infobase Conference Papers · January 1, 2014
We propose a novel qubit state measurement method for photonic frequency qubits using a Mach-Zehnder interferometer with unequal path lengths. A practical implementation for photons generated by 171Yb+ ions in a surface trap is descri ...
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ConferenceASEE Annual Conference and Exposition Conference Proceedings · January 1, 2007
A new introductory course, Fundamentals of Electrical and Computer Engineering (ECE), has been designed to provide a rigorous, integrated introduction to the ECE field. The course laboratory, described in this paper, both promotes concept integration and p ...
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ConferenceASEE Annual Conference and Exposition, Conference Proceedings · 2007
A new introductory course, Fundamentals of Electrical and Computer Engineering (ECE), has been designed to provide a rigorous, integrated introduction to the ECE field. The course laboratory, described in this paper, both promotes concept integration and p ...
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ConferenceASEE Annual Conference and Exposition Conference Proceedings · January 1, 2006
The Electrical and Computer Engineering (ECE) department at Duke University is undergoing extensive curriculum revisions incorporating both new content and organization and innovative teaching methods. The cornerstone of the new curriculum is a theme-based ...
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ConferenceOptics Infobase Conference Papers · January 1, 2006
Realizing ion trap based large-scale quantum information processor requires integrated optics technologies. We design and characterize basic optical beam steering system using micromirrors as a first step towards constructing high-quality functional integr ...
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ConferenceASEE Annual Conference and Exposition, Conference Proceedings · 2005
Undergraduates in Electrical and Computer Engineering (ECE) at Duke University have benefited from the combination of curricular flexibility and rigorous coursework. The current curriculum is further limited in that the core courses do not offer a vertical ...
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ConferenceConference on Optical Fiber Communication Technical Digest Series · January 1, 2003
We report drift-free two-axis tilting MEMS mirrors fabricated from single crystal silicon. These micromirrors survive 1000 G mechanical shocks and exhibit angular stability better than 4 millidegrees under simulated office vibrations. Two hermetically seal ...
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ConferenceOptics Infobase Conference Papers · January 1, 2001
A 1296-port MEMS transparent optical crossconnect with 5.1dB+/-1.1dB insertion loss at 1550nm is reported. Measured worst-case optical crosstalk in a fabric was h38dB and nominal switching rise/fall times were 5msec. A 2.07Petabit/s switch capacity was ver ...
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