A5086641609- Quantum Information and Cryptography
- Quantum optics and atomic interactions
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum and electron transport phenomena
- Photonic and Optical Devices
- Mechanical and Optical Resonators
- Quantum Computing Algorithms and Architecture
- Crystal Structures and Properties
- Diamond and Carbon-based Materials Research
- Advanced X-ray Imaging Techniques
- Advanced Electron Microscopy Techniques and Applications
- Photonic Crystals and Applications
- Inorganic Chemistry and Materials
- Strong Light-Matter Interactions
- Atomic and Subatomic Physics Research
- Advanced Frequency and Time Standards
- Quantum Mechanics and Applications
- Advanced Fiber Laser Technologies
- Orbital Angular Momentum in Optics
- Electronic and Structural Properties of Oxides
- Spectroscopy and Laser Applications
- Rare-earth and actinide compounds
- Multiferroics and related materials
- Mesoporous Materials and Catalysis
- Ion-surface interactions and analysis
Princeton University
2018-2025
Yale University
2008-2022
Harvard University
2009-2017
Massachusetts Institute of Technology
2016
Johannes Gutenberg University Mainz
2009
Quantum Design (Germany)
2008
Hybrid quantum devices, in which dissimilar systems are combined order to attain qualities not available with either system alone, may enable far-reaching control measurement, sensing, and information processing. A paradigmatic example is trapped ultracold atoms, offer excellent coherent properties, coupled nanoscale solid-state systems, allow for strong interactions. We demonstrate a deterministic interface between single rubidium atom photonic crystal cavity. Precise over the atom's...
The ability to distribute quantum entanglement over long distances is a vital ingredient for technologies. Single atoms and atom-like defects in solids are ideal light sources memories store entanglement. However, major obstacle developing long-range networks the mismatch between typical atomic transition energies ultraviolet visible spectrum, low-loss propagation band of optical fibers infrared, around 1.5 $\mu$m. A notable exception Er$^{3+}$ ion, whose $\mu$m exploited fiber amplifiers...
The great promise of quantum computers comes with the dual challenges building them and finding their useful applications. We argue that these two should be considered together, by codesigning full-stack computer systems along applications in order to hasten development potential for scientific discovery. In this context, we identify community needs, opportunities, a sampling few use case studies, significant science over next 2–10 years. This document is written university, national...
We investigate quantum control of a single atom in tightly focused optical tweezer trap. show that inevitable spatially varying polarization gives rise to significant internal-state decoherence but this effect can be mitigated by an appropriately chosen magnetic bias field. This enables Raman sideband cooling close its three-dimensional ground state (vibrational numbers ${\overline{n}}_{x}={\overline{n}}_{y}=0.01$, ${\overline{n}}_{z}=8$) even for trap beam waist as small $w=900\text{...
Abstract Optically-interfaced spins in the solid state are a promising platform for quantum technologies. A crucial component of these systems is high-fidelity, projective measurement spin state. Here, we demonstrate single-shot readout single rare earth ion qubit, Er 3+ , which attractive its telecom-wavelength optical transition and compatibility with silicon nanophotonic circuits. In previous work laser-cooled atoms ions, solid-state defects, accomplished using fluorescence on an cycling...
Executing quantum algorithms on error-corrected logical qubits is a critical step for scalable computing, but the requisite numbers of and physical error rates are demanding current experimental hardware. Recently, development correcting codes tailored to particular noise models has helped relax these requirements. In this work, we propose qubit encoding gate protocol 171Yb neutral atom that converts dominant errors into erasures, is, in known locations. The key idea encode metastable...
Neutral atom qubits with Rydberg-mediated interactions are a leading platform for developing large-scale coherent quantum systems. In the majority of experiments to date, Rydberg states not trapped by same potential that confines ground state atoms, resulting in loss and constraints on achievable interaction time. this Letter, we demonstrate an alkaline earth atom, ytterbium, can be stably red-detuned optical tweezer also state, leveraging polarizability Yb^{+} ion core. Using previously...
Neutral atom arrays are a rapidly developing platform for quantum science. In this work, we demonstrate universal set of gate operations on new type neutral qubit: nuclear spin in an alkaline earth-like (AEA), $^{171}$Yb. We present techniques cooling, trapping and imaging using newly discovered magic wavelength at $\lambda = 486.78$ nm. implement qubit initialization, readout, single-qubit gates, observe long lifetimes, $T_1 \approx 20$ s $T^*_2 1.24(5)$ s, operation fidelity...
Highly excited Rydberg states and their interactions play an important role in quantum computing simulation. These properties can be predicted accurately for alkali atoms with simple level structures. However, extension of these methods to more complex such as alkaline-earth has not been demonstrated or experimentally validated. Here, we present multichannel defect models highly <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"...
We present the results of theoretical and experimental studies dispersively coupled (or 'membrane in middle') optomechanical systems. calculate linear optical properties a high finesse cavity containing thin dielectric membrane. focus on cavity's transmission, reflection as function membrane's position along axis its loss. compare these calculations with measurements find excellent agreement cavities empty-cavity finesses range 104–105. The imaginary part index refraction is found to be...
We have measured the optical and mechanical loss of commercial silicon nitride membranes. find that 50nm thick, 1mm2 membranes Q&gt;106 at 293K, Q&gt;107 300mK, well above what has been observed in devices with comparable dimensions. The near-IR 293K is less than 2×10−4. This combination properties make these attractive candidates for studying quantum effects optomechanical systems.
We experimentally demonstrate electromagnetically induced transparency and light storage with ultracold 87Rb atoms in a Mott insulating state three-dimensional optical lattice. have observed times of approximately 240 ms, to our knowledge the longest ever achieved atomic samples. Using differential shift caused by spatially inhomogeneous far detuned field we imprint "phase gradient" across sample, resulting controlled angular redirection retrieved pulse.
We demonstrate a method for efficient coupling of guided light from single mode optical fiber to nanophotonic devices.Our approach makes use single-sided conical tapered fibers that are evanescently coupled over the last ∼ 10 µm waveguide.By means adiabatic transfer using properly chosen taper, single-mode fiber-waveguide efficiencies as high 97(1)% achieved.Efficient is obtained wide range device geometries which either singly-clamped on chip or attached fiber, demonstrating promising...
Engineering controllable, strongly interacting many-body quantum systems is at the frontier of simulation and information processing. Arrays laser-cooled neutral atoms in optical tweezers have emerged as a promising platform because their flexibility potential for strong interactions via Rydberg states. Existing atom array experiments utilize alkali atoms, but alkaline-earth offer many advantages terms coherence control, also open door to new applications precision measurement time keeping....
We propose to use subwavelength confinement of light associated with the near field plasmonic systems create nanoscale optical lattices for ultracold atoms. Our approach combines unique coherence properties isolated atoms manipulation and strong light-matter interaction nanoplasmonic systems. It allows one considerably increase energy scales in realization Hubbard models engineer effective long-range interactions coherent dissipative many-body dynamics. Realistic imperfections potential...
Bound states of massive particles, such as nuclei, atoms, or molecules, constitute the bulk visible world around us. By contrast, photons typically only interact weakly. We report observation traveling three-photon bound in a quantum nonlinear medium where interactions between are mediated by atomic Rydberg states. Photon correlation and conditional phase measurements reveal distinct bunching features associated with two-photon Such photonic trimers dimers possess shape-preserving wave...
Solid-state spin defects are a promising platform for quantum science and technology, having realized demonstrations of variety key components information processing, particularly in the area networks. An outstanding challenge building larger-scale systems with solid-state is realizing high-fidelity control over multiple nanoscale separations, which required to realize strong spin-spin interactions multi-qubit logic creation entangled states. In this work, we experimentally demonstrate an...
A proposal for preparing Rydberg arrays containing hundreds of circular atoms and comparatively small two-qubit gate errors is presented, enabling significant improvement to quantum computing simulation with neutral atoms.
Erbium-doped materials can serve as spin-photon interfaces with optical transitions in the telecom $C$ band, making them an exciting class of for long-distance quantum communication. However, spin and coherence times ${\mathrm{Er}}^{3+}$ ions are limited by currently available host materials, motivating development new ${\mathrm{Er}}^{3+}$-containing materials. Here we demonstrate use ion implantation to efficiently screen prospective candidates, show that disorder introduced be mitigated...
Robust gate sequences are widely used to reduce the sensitivity of operations experimental imperfections. Typically, optimization minimizes average error, however, recent work in quantum error correction has demonstrated that performance encoded logical qubits is sensitive not only rate, but also type errors occur. Here, we present a family Rydberg blockade gates for neutral atom robust against two common, major imperfections: intensity inhomogeneity and Doppler shifts. These outperform...
The requirements for fault-tolerant quantum error correction can be simplified by leveraging structure in the noise of underlying hardware. In this work, we identify a new type structured motivated neutral-atom qubits, biased erasure errors, which arises when qubit errors are dominated detectable leakage from only one computational states qubit. We study performance model using gate-level simulations XZZX surface code. Using predicted fraction and bias metastable Yb171 find threshold 8.2%...