Abram L. Falk
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View article: Distilled remote entanglement between superconducting qubits across optical channels
Distilled remote entanglement between superconducting qubits across optical channels Open
A promising quantum computing architecture comprises modules of superconducting quantum processors linked via optical channels using quantum transducers. As quantum transducer hardware improves, a need has arisen to understand the quantita…
View article: Monte Carlo model of distilled remote entanglement between superconducting qubits across optical channels
Monte Carlo model of distilled remote entanglement between superconducting qubits across optical channels Open
A promising quantum computing architecture comprises modules of superconducting quantum processors linked by optical channels via quantum transducers. To map transducer device performance to system-level channel performance, our model uses…
View article: Silicon‐On‐Silicon Carbide Platform for Integrated Photonics
Silicon‐On‐Silicon Carbide Platform for Integrated Photonics Open
Silicon carbide (SiC)'s nonlinear optical properties and applications to quantum information have recently brought attention to its potential as an integrated photonics platform. However, despite its many excellent material properties, suc…
View article: Ultrafast infrared plasmon switching in aligned carbon-nanotube optical resonators
Ultrafast infrared plasmon switching in aligned carbon-nanotube optical resonators Open
Reconfigurable plasmonic materials are crucial components in active photonic devices for optical communication, signal processing, and sensing applications. Certain candidates including transparent conducting oxides, small-bandgap semicond…
View article: Ultrahigh-Q on-chip silicon–germanium microresonators
Ultrahigh-Q on-chip silicon–germanium microresonators Open
To date, integrated waveguides with the lowest losses have all relied at least in part on amorphous materials. In this work, we demonstrate fully crystalline, single-mode integrated microresonators comprising epitaxially grown …
View article: Multiple Tunable Hyperbolic Resonances in Broadband Infrared Carbon-Nanotube Metamaterials
Multiple Tunable Hyperbolic Resonances in Broadband Infrared Carbon-Nanotube Metamaterials Open
Aligned densely packed carbon-nanotube metamaterials prepared using vacuum filtration are an emerging infrared nanophotonic material. We report multiple hyperbolic plasmon resonances, together spanning the mid-infrared, in individual reson…
View article: Stabilization of point-defect spin qubits by quantum wells
Stabilization of point-defect spin qubits by quantum wells Open
Defect-based quantum systems in wide bandgap semiconductors are strong candidates for scalable quantum-information technologies. However, these systems are often complicated by charge-state instabilities and interference by phonons, which …
View article: Quantum well stabilized point defect spin qubits
Quantum well stabilized point defect spin qubits Open
Defect-based quantum systems in in wide bandgap semiconductors are strong candidates for scalable quantum-information technologies. However, these systems are often complicated by charge-state instabilities and interference by phonons, whi…
View article: Enhanced stability of defect-based qubits in quantum wells
Enhanced stability of defect-based qubits in quantum wells Open
Optically addressable paramagnetic point defects in semiconductors are among the most promising systems for quantum-information technologies. However, the fidelities of spin initialization and readout rely on optical cycling, and charge-st…
View article: Tunable Hyperbolic Metamaterials Based on Self-Assembled\nCarbon Nanotubes
Tunable Hyperbolic Metamaterials Based on Self-Assembled\nCarbon Nanotubes Open
We show that packed, horizontally\naligned films of single-walled\ncarbon nanotubes are hyperbolic metamaterials with ultrasubwavelength\nunit cells and dynamic tunability. Using Mueller matrix ellipsometry,\nwe characterize the films’ opt…
View article: Tunable Hyperbolic Metamaterials Based on Self-Assembled Carbon Nanotubes
Tunable Hyperbolic Metamaterials Based on Self-Assembled Carbon Nanotubes Open
We show that packed, horizontally aligned films of single-walled carbon nanotubes are hyperbolic metamaterials with ultra-subwavelength unit cells and dynamic tunability. Using Mueller-matrix ellipsometry, we characterize the films' doping…
View article: Intrinsically ultrastrong plasmon–exciton interactions in crystallized films of carbon nanotubes
Intrinsically ultrastrong plasmon–exciton interactions in crystallized films of carbon nanotubes Open
Significance Carbon nanotubes, each a cylindrical nanocrystal of carbon atoms, can be crystallized into monolithic, two-dimensionally ordered films through a simple vacuum filtration technique. A particularly fascinating property of these …
View article: Intrinsically ultrastrong light-matter interactions in crystalline films of carbon nanotubes
Intrinsically ultrastrong light-matter interactions in crystalline films of carbon nanotubes Open
When optical emitters are strongly coupled to optical cavities, light and matter mix and lose their distinct characteristics. To date, strong light-matter coupling has only been observed in hybrid systems, where cavities and emitters are s…
View article: Strong and Broadly Tunable Plasmon Resonances in Thick Films of Aligned Carbon Nanotubes
Strong and Broadly Tunable Plasmon Resonances in Thick Films of Aligned Carbon Nanotubes Open
Low-dimensional plasmonic materials can function as high quality terahertz and infrared antennas at deep subwavelength scales. Despite these antennas' strong coupling to electromagnetic fields, there is a pressing need to further strengthe…
View article: Coherent Plasmon and Phonon-Plasmon Resonances in Carbon Nanotubes
Coherent Plasmon and Phonon-Plasmon Resonances in Carbon Nanotubes Open
Carbon nanotubes provide a rare access point into the plasmon physics of one-dimensional electronic systems. By assembling purified nanotubes into uniformly sized arrays, we show that they support coherent plasmon resonances, that these pl…
View article: High-Fidelity Bidirectional Nuclear Qubit Initialization in SiC
High-Fidelity Bidirectional Nuclear Qubit Initialization in SiC Open
Dynamic nuclear polarization (DNP) is an attractive method for initializing nuclear spins that are strongly coupled to optically active electron spins because it functions at room temperature and does not require strong magnetic fields. In…
View article: Quantum decoherence dynamics of divacancy spins in silicon carbide
Quantum decoherence dynamics of divacancy spins in silicon carbide Open
View article: Quantum entanglement at ambient conditions in a macroscopic solid-state spin ensemble
Quantum entanglement at ambient conditions in a macroscopic solid-state spin ensemble Open
On-demand generation of many maximally entangled Bell states in a room-temperature semiconductor at low magnetic field.
View article: Theoretical model of dynamic spin polarization of nuclei coupled to paramagnetic point defects in diamond and silicon carbide
Theoretical model of dynamic spin polarization of nuclei coupled to paramagnetic point defects in diamond and silicon carbide Open
Dynamic nuclear spin polarization (DNP) mediated by paramagnetic point\ndefects in semiconductors is a key resource for both initializing nuclear\nquantum memories and producing nuclear hyperpolarization. DNP is therefore an\nimportant pro…
View article: Optical Polarization of Nuclear Spins in Silicon Carbide
Optical Polarization of Nuclear Spins in Silicon Carbide Open
We demonstrate optically pumped dynamic nuclear polarization of (29)Si nuclear spins that are strongly coupled to paramagnetic color centers in 4H- and 6H-SiC. The 99%±1% degree of polarization that we observe at room temperature correspon…