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View article: Modeling Short-Range Microwave Networks to Scale Superconducting Quantum Computation
Modeling Short-Range Microwave Networks to Scale Superconducting Quantum Computation Open
A core challenge for superconducting quantum computers is to scale up the number of qubits in each processor without increasing noise or cross-talk. Distributed quantum computing across small qubit arrays, known as chiplets, can address th…
View article: Coherent dynamics in an optical quantum dot with phonons and photons
Coherent dynamics in an optical quantum dot with phonons and photons Open
Genuine quantum-mechanical effects are readily observable in modern optomechanical systems comprising “classical” (bosonic) optical resonators. Unique features and advantages of optical two-level systems (qubits) for optomechanics, however…
View article: Gated InAs quantum dots embedded in surface acoustic wave cavities for low-noise optomechanics
Gated InAs quantum dots embedded in surface acoustic wave cavities for low-noise optomechanics Open
Self-assembled InAs quantum dots (QDs) are promising optomechanical elements due to their excellent photonic properties and sensitivity to local strain fields. Microwave-frequency modulation of photons scattered from these efficient quantu…
View article: Coherent Control of an Optical Quantum Dot Using Phonons and Photons
Coherent Control of an Optical Quantum Dot Using Phonons and Photons Open
Genuine quantum-mechanical effects are readily observable in modern optomechanical systems comprising bosonic ("classical") optical resonators. Here we describe unique features and advantages of optical two-level systems, or qubits, for op…
View article: Gated InAs quantum dots embedded in surface acoustic wave cavities for low-noise optomechanics
Gated InAs quantum dots embedded in surface acoustic wave cavities for low-noise optomechanics Open
Self-assembled InAs quantum dots (QDs) are promising optomechanical elements due to their excellent photonic properties and sensitivity to local strain fields. Microwave-frequency modulation of photons scattered from these efficient quantu…
View article: Monolithic polarizing circular dielectric gratings on bulk substrates for improved photon collection from <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><mml:mrow><mml:mi>In</mml:mi><mml:mi>As</mml:mi></mml:mrow></mml:math> quantum dots
Monolithic polarizing circular dielectric gratings on bulk substrates for improved photon collection from quantum dots Open
III-V semiconductor quantum dots (QDs) are near-ideal and versatile single-photon sources. Because of the capacity for monolithic integration with photonic structures as well as optoelectronic and optomechanical systems, they are proving u…
View article: Monolithic Polarizing Circular Dielectric Gratings on Bulk Substrates for Improved Photon Collection from InAs Quantum Dots
Monolithic Polarizing Circular Dielectric Gratings on Bulk Substrates for Improved Photon Collection from InAs Quantum Dots Open
III-V semiconductor quantum dots (QDs) are near-ideal and versatile single-photon sources. Because of the capacity for monolithic integration with photonic structures as well as optoelectronic and optomechanical systems, they are proving u…
View article: Nonlocal subpicosecond delay metrology using spectral quantum interference
Nonlocal subpicosecond delay metrology using spectral quantum interference Open
Precise knowledge of position and timing information is critical to support elementary protocols such as entanglement swapping on quantum networks. While approaches have been devised to use quantum light for such metrology, they largely re…
View article: Large Single-Phonon Optomechanical Coupling between Quantum Dots and Tightly Confined Surface Acoustic Waves in the Quantum Regime
Large Single-Phonon Optomechanical Coupling between Quantum Dots and Tightly Confined Surface Acoustic Waves in the Quantum Regime Open
Surface acoustic waves (SAWs) coupled to quantum dots (QDs), trapped atoms and ions, and point defects have been proposed as quantum transduction platforms, yet the requisite coupling rates and cavity lifetimes have not been experimentally…
View article: Quantum phase modulation with acoustic cavities and quantum dots
Quantum phase modulation with acoustic cavities and quantum dots Open
Fast, efficient, and low-power modulation of light at microwave frequencies is crucial for chip-scale classical and quantum processing as well as for long-range networks of superconducting quantum processors. A successful approach to bridg…
View article: Nonlocal subpicosecond delay metrology using spectral quantum interference
Nonlocal subpicosecond delay metrology using spectral quantum interference Open
Timing and positioning measurements are key requisites for essential quantum network operations such as Bell state measurement. Conventional time-of-flight measurements using single-photon detectors are often limited by detection timing ji…
View article: Modeling Short-Range Microwave Networks to Scale Superconducting Quantum Computation
Modeling Short-Range Microwave Networks to Scale Superconducting Quantum Computation Open
A core challenge for superconducting quantum computers is to scale up the number of qubits in each processor without increasing noise or cross-talk. Distributed quantum computing across small qubit arrays, known as chiplets, can address th…
View article: Quantum phase modulation with acoustic cavities and quantum dots
Quantum phase modulation with acoustic cavities and quantum dots Open
Fast, efficient, and low power modulation of light at microwave frequencies is crucial for chip-scale classical and quantum processing as well as for long-range networks of superconducting quantum processors. A successful approach to bridg…
View article: Quantum Information Processing in the Frequency Domain
Quantum Information Processing in the Frequency Domain Open
Quantum technologies promise to revolutionize information processing through dramatic computational speed-ups and ultimate security compared with classical counterparts. As matter-based qubit systems increase in size, however, counteractin…
View article: Probing quantum walks through coherent control of high-dimensionally entangled photons
Probing quantum walks through coherent control of high-dimensionally entangled photons Open
Demonstrating continuously tunable photonic quantum walks in the frequency domain with high-dimensionally entangled photon pairs.
View article: Quantum frequency combs and Hong–Ou–Mandel interferometry: the role of spectral phase coherence
Quantum frequency combs and Hong–Ou–Mandel interferometry: the role of spectral phase coherence Open
The Hong-Ou-Mandel interferometer is a versatile tool for analyzing the joint properties of photon pairs, relying on a truly quantum interference effect between two-photon probability amplitudes. While the theory behind this form of two-ph…
View article: Probing quantum walks through coherent control of high-dimensionally\n entangled photons
Probing quantum walks through coherent control of high-dimensionally\n entangled photons Open
Quantum walks in atomic systems, owing to their continuous nature, are\nespecially well-suited for the simulation of many-body physics and can\npotentially offer an exponential speedup in solving certain black box problems.\nPhotonics offe…
View article: Quantum Phase Estimation with Time‐Frequency Qudits in a Single Photon
Quantum Phase Estimation with Time‐Frequency Qudits in a Single Photon Open
The Phase Estimation Algorithm (PEA) is an important quantum algorithm used independently or as a key subroutine in other quantum algorithms. Currently most implementations of the PEA are based on qubits, where the computational units in t…
View article: Generation of a non-separable two-qudit state using a time-frequency SUM operation
Generation of a non-separable two-qudit state using a time-frequency SUM operation Open
We demonstrate a deterministic two-qudit SUM gate with up to 16-dimensional qudits encoded in the time and frequency degrees of freedom of a single photon. Using this SUM gate, we generate non-separable time-frequency qudit states.
View article: Quantum Phase Estimation with Time-Frequency Qudits in a Single Photon
Quantum Phase Estimation with Time-Frequency Qudits in a Single Photon Open
The Phase Estimation Algorithm (PEA) is an important quantum algorithm used independently or as a key subroutine in other quantum algorithms. Currently most implementations of the PEA are based on qubits, where the computational units in t…
View article: Polarization diversity phase modulator for measuring frequency-bin entanglement of a biphoton frequency comb in a depolarized channel
Polarization diversity phase modulator for measuring frequency-bin entanglement of a biphoton frequency comb in a depolarized channel Open
Phase modulation has emerged as a technique to create and manipulate high-dimensional frequency-bin entanglement. A necessary step to extending this technique to depolarized channels, such as those in a quantum networking environment, is t…
View article: Demonstration of four-party 32-dimensional Greenberger-Horne-Zeilinger entangled state
Demonstration of four-party 32-dimensional Greenberger-Horne-Zeilinger entangled state Open
By utilizing two-qudit SUM gates between time and frequency degrees of freedom in photons, we demonstrate a high-dimensional non-separable state between two degrees of freedom of photonic states, and realize a four-party 32-dimensional GHZ…
View article: Spectral phase coherence in HOM interferometry
Spectral phase coherence in HOM interferometry Open
We examine the role of spectral phase in Hong-Ou-Mandel interference by comparing interferograms for pure and mixed states. We find that HOM interference cannot be taken as a signature of coherent frequency superpositions.
View article: Bayesian machine learning of frequency-bin CNOT
Bayesian machine learning of frequency-bin CNOT Open
We analyze the first experimental two-photon frequency-bin gate: a coincidence-basis CNOT. A novel characterization approach based on Bayesian machine learning is developed to estimate the gate performance with measurements in the logical …
View article: A two-qudit operation on a 256-dimensional Hilbert space
A two-qudit operation on a 256-dimensional Hilbert space Open
By encoding two 16-dimensional qudits in the time and frequency degrees of freedom of a heralded single photon, we realize a deterministic photonic two-qudit SUM gate operating on a 256-dimensional Hilbert space.
View article: Characterization of coherent quantum frequency combs using electro-optic phase modulation
Characterization of coherent quantum frequency combs using electro-optic phase modulation Open
We demonstrate a two-photon interference experiment for phase coherent\nbiphoton frequency combs (BFCs), created through spectral amplitude filtering\nof biphotons with a continuous broadband spectrum. By using an electro-optic\nphase modu…
View article: Experimental demonstration of CNOT gate for frequency-encoded qubits
Experimental demonstration of CNOT gate for frequency-encoded qubits Open
We demonstrate the first two-photon gate for frequency-bin qubits, using optical pulse shaping and electro-optic phase modulation. Our coincidence-basis CNOT has a fidelity of 0.9947 ± 0.0008 and shows controlled qubit flips in the computa…
View article: Two-qudit deterministic optical quantum logic in a single photon
Two-qudit deterministic optical quantum logic in a single photon Open
We demonstrate deterministic two-qudit gates using the time and frequency degrees of freedom of a single photon, showing the potential of our scheme for deterministic quantum computing in high-dimensional Hilbert spaces.
View article: Persistent energy–time entanglement covering multiple resonances of an on-chip biphoton frequency comb
Persistent energy–time entanglement covering multiple resonances of an on-chip biphoton frequency comb Open
We investigate the time-frequency signatures of an on-chip biphoton frequency comb (BFC) generated from a silicon nitride microring resonator. Using a Franson interferometer, we examine the multifrequency nature of the photon pair source i…