S. C. Burd
National Institute of Standards and Technology
PhysicsSemiconductor laser theoryQuantum decoherenceLaser linewidthIonQuantum stateQuantum informationAtomic physicsField (physics)Materials scienceQubitSensitivity (control systems)Coupling (physics)MicrowaveOptoelectronicsLaserQuantum mechanicsGround stateClassical mechanicsQuantum
41Publications
9H-index
375Citations
Publications 35
Newest
#9Dietrich Leibfried (NIST: National Institute of Standards and Technology)H-Index: 63
Universal control of multiple qubits—the ability to entangle qubits and to perform arbitrary individual qubit operations1—is a fundamental resource for quantum computing2, simulation3 and networking4. Qubits realized in trapped atomic ions have shown the highest-fidelity two-qubit entangling operations5–7 and single-qubit rotations8 so far. Universal control of trapped ion qubits has been separately demonstrated using tightly focused laser beams9–12 or by moving ions with respect to laser beams1...
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#1R. T. Sutherland (UTSA: University of Texas at San Antonio)H-Index: 8
#2S. C. Burd (NIST: National Institute of Standards and Technology)H-Index: 9
Last. Dietrich Leibfried (NIST: National Institute of Standards and Technology)H-Index: 63
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Transport, separation, and merging of trapped ion crystals are essential operations for most large-scale quantum computing architectures. In this work, we develop a theoretical framework that describes the dynamics of ions in time-varying potentials with a motional squeeze operator, followed by a motional displacement operator. Using this framework, we develop a new, general protocol for trapped ion transport, separation, and merging. We show that motional squeezing can prepare an ion wave packe...
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#1S. C. Burd (NIST: National Institute of Standards and Technology)H-Index: 9
#2Raghavendra Srinivas (NIST: National Institute of Standards and Technology)H-Index: 8
Last. Daniel H. Slichter (NIST: National Institute of Standards and Technology)H-Index: 16
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Strong and precisely controlled interactions between quantum objects are essential for quantum information processing1,2, simulation3 and sensing4,5, and for the formation of exotic quantum matter6. A well-established paradigm for coupling otherwise weakly interacting quantum objects is to use auxiliary bosonic quantum excitations to mediate the interactions. Important examples include photon-mediated interactions between atoms7, superconducting qubits8, and colour centres in diamond9, and phono...
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#1H. M. KnaackH-Index: 4
#2S. C. BurdH-Index: 9
Last. John J. BollingerH-Index: 56
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#2S. C. BurdH-Index: 9
Last. Daniel H. SlichterH-Index: 16
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Universal control of multiple qubits -- the ability to entangle qubits and to perform arbitrary individual qubit operations -- is a fundamental resource for quantum computation, simulation, and networking. Here, we implement a new laser-free scheme for universal control of trapped ion qubits based on microwave magnetic fields and radiofrequency magnetic field gradients. We demonstrate high-fidelity entanglement and individual control by creating symmetric and antisymmetric two-qubit maximally en...
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#1R. T. Sutherland (LLNL: Lawrence Livermore National Laboratory)H-Index: 8
Last. Stephen B. Libby (LLNL: Lawrence Livermore National Laboratory)H-Index: 15
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The dominant error sources for state-of-the-art laser-free trapped-ion entangling gates are decoherence of the qubit state and motion. The effect of these decoherence mechanisms can be suppressed with additional control fields, or through other techniques that reduce gate speed. Here, we propose using a near-motional-frequency magnetic field gradient to make a laser-free gate that is simultaneously resilient to both types of decoherence, does not require additional control fields, and has a rela...
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#1S. C. BurdH-Index: 9
Last. Andrew C. WilsonH-Index: 24
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Two vertical-external-cavity surface-emitting laser (VECSEL) systems producing ultraviolet (UV) radiation at 235 nm and 313 nm are demonstrated. The systems are suitable for quantum information processing applications with trapped beryllium ions. Each system consists of a compact, single-frequency, continuous-wave VECSEL producing high-power near-infrared light, tunable over tens of nanometers. One system generates 2.4 W at 940 nm, using a gain mirror based on GaInAs/GaAs quantum wells, which is...
#1H. M. KnaackH-Index: 4
Last. Daniel H. SlichterH-Index: 16
view all 10 authors...
#1Katherine C. McCormick (CU: University of Colorado Boulder)H-Index: 5
#2J. Keller (NIST: National Institute of Standards and Technology)H-Index: 1
Last. Dietrich Leibfried (NIST: National Institute of Standards and Technology)H-Index: 63
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Special quantum states are used in metrology to achieve sensitivities below the limits established by classically behaving states1,2. In bosonic interferometers, squeezed states3, number states4,5 and ‘Schrodinger cat’ states5 have been implemented on various platforms and have demonstrated improved measurement precision over interferometers using coherent states6,7. Another metrologically useful state is an equal superposition of two eigenstates with maximally different energies; this state ide...
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