Jeremy O'Brien

“Quantum metrology with squeezed states exceeds shot-noise limit phase estimation precision.”

“Extinction ratio exceeds 60 dB in the silicon photonic device”

“Client tasks in the protocol are realized as linear combinations of operations implemented by the server, with linear coefficients hidden from the server.”

“Perfectly overlapped modes are not required for quantum-enhanced measurement in quantum metrology”

“Non-classical techniques provide less than 20% reduction in RMSE compared to ideal classical techniques in multi-pass optical setups, for a given number of incident photons.”

“Explicit efficient quantum circuits exist for implementing continuous-time quantum walks on circulant graphs.”

“InP transmitter and SiOxNy receiver chips achieve low error rate QKD at GHz clock rates”

“Narrow linewidth photons are produced under nearly perfect quantum control from a single 87Rb atom strongly coupled to a high-finesse cavity.”

“High-fidelity entanglement distribution and manipulation is achieved between two separate silicon photonic chips.”

“Precision in state-of-the-art absorption spectroscopy is theoretically limited by shot-noise from the Poisson distribution of photons in laser radiation.”

“Haar random unitary matrices can be directly implemented in optical circuits without prior or explicit matrix calculations.”

“CV entanglement in EPR states is generated and characterized on a photonic chip.”

“The system consists of a six-mode universal linear optical circuit with 15 Mach-Zehnder interferometers and 30 thermo-optic phase shifters on a single photonic chip.”

“Active temporal multiplexing overcomes non-deterministic photon generation in photonic quantum systems.”

“Experiments with single photons have historically led tests of fundamental quantum theory.”

“The silicon photonic chip generates a path-entangled two-qubit state, the smallest non-trivial cluster state.”

“Photon loss in optical components and non-unit heralding detector efficiency degrade multiplexed single-photon source performance by reducing single-photon emission probability and increasing multi-photon contamination.”

“The protocol enables fair gambling between two spatially separated parties without a trusted third party.”

“Two-photon quantum interference visibility of 94.9 ± 1.3% achieved in GaAs directional couplers.”

“Precision of QPT is limited by unavoidable shot noise in single-photon and laser probes.”

“1-designs are indistinguishable from true random operations for 1-photon quantum interference”

“Detection of photons through linear optical circuits samples from a classically intractable probability distribution”

“Quantum walks of correlated photon pairs were demonstrated in a 2D 'swiss cross' waveguide array.”

“The scheme harnesses all multi-photon components in spontaneous parametric downconversion for quantum metrology”

“The variational method reduces coherence time requirements compared to quantum phase estimation for finding eigenvalues.”

“The device combines two four-wave mixing photon sources in a waveguide interferometer with a reconfigurable phase shifter.”

“Coherent evolution of two-photon quantum walks was achieved using planar arrays of 21 evanescently coupled waveguides in silicon oxynitride.”

“The scheme retrieves the unitary matrix using data from one-photon and two-photon ensembles.”

“Quantum controlled beam-splitter enables simultaneous investigation of both particle and wave behaviors in a delayed-choice setup.”

“Multi-photon quantum interference models provide exponential speedup over classical computers for certain problems”

“Maximum coincidence-to-accidental ratio (CAR) of 602 ± 37 in silicon micro-ring photon pair generation”

“GaN directional couplers fabricated with ICP etching show high-quality facets and well-defined gaps”

“Quantum interference and manipulation of quantum states of light are demonstrated in silicon-on-insulator waveguide circuits.”

“Qubit recycling replaces the n-qubit control register with a single qubit recycled n times, reducing total qubits to one third of the standard Shor's protocol.”

“Bell inequalities can be violated with near certainty using unaligned but calibrated measurement devices.”

“All prior quantum algorithm demonstrations required knowing the answer beforehand to construct the algorithm.”

“Entangled states of light enable the same precision in optical interferometry as higher light intensity with less sample exposure.”

“Fast polarization and path control of 1550 nm photons is achieved in lithium niobate waveguide devices using the electro-optic effect.”

“Entangled photons can simulate quantum interference of fermions, bosons, and anyons”

“Technique achieves positional accuracy of hundreds of nanometers for structures relative to fluorescent defects in diamond.”

“This is the first demonstration of a 1550 nm correlated photon-pair source in an integrated chalcogenide As2S3 waveguide.”

“Single NE8 color center in diamond nanocrystal exhibits single photon coherence time of 0.21 ps at room temperature.”

“This work is the first demonstration of quantum interference in multimode interference (MMI) devices.”

“Quantum walks of two identical photons were performed in an array of 21 continuously evanescently-coupled waveguides in a SiOxNy chip.”

“Knill, Laflamme, and Milburn proposed a heralded CNOT gate using linear optical elements, auxiliary photons, and measurement to achieve efficient optical nonlinearity at the single-photon level.”

“The technique allows adding control qubits to arbitrary unknown quantum operations”

“Integrated SILs etched into diamond increase saturated count-rate from a single NV- center by a factor of 10 compared to planar surfaces.”

“Projective measurement of auxiliary photons heralds two- and four-photon path-entangled NOON states in an integrated waveguide device.”

“Photonic quantum circuits fabricated from silica-on-silicon waveguides operate at levels required for quantum information science.”

“SSPDs achieve 92.3±1.0% two-photon interference visibility in a silica-on-silicon waveguide directional coupler at λ=804 nm”