A5053910251- Quantum Information and Cryptography
- Photonic and Optical Devices
- Mechanical and Optical Resonators
- Quantum Mechanics and Applications
- Quantum optics and atomic interactions
- Advanced Fiber Laser Technologies
- Advanced Optical Sensing Technologies
- Atomic and Subatomic Physics Research
- Quantum Computing Algorithms and Architecture
- Advanced Fluorescence Microscopy Techniques
- Cold Atom Physics and Bose-Einstein Condensates
- Photorefractive and Nonlinear Optics
- Neural Networks and Reservoir Computing
- Laser-Matter Interactions and Applications
- Random lasers and scattering media
- Superconducting and THz Device Technology
- Advanced Thermodynamics and Statistical Mechanics
- Nonlinear Optical Materials Studies
- Spectroscopy and Laser Applications
- Ocular and Laser Science Research
- Advanced Semiconductor Detectors and Materials
- Semiconductor Lasers and Optical Devices
- Calibration and Measurement Techniques
- Orbital Angular Momentum in Optics
- Biofield Effects and Biophysics
National Institute of Standards and Technology
2015-2024
National Institute of Standards
2014-2024
Information Technology Laboratory
2021-2024
Carnegie Mellon University
2023
University of Maryland, College Park
2012-2022
Physical Measurement Laboratory
2016-2019
National University of Singapore
2018
Centre for Quantum Technologies
2018
University of Rochester
2016
Joint Quantum Institute
2012
Local realism is the worldview in which physical properties of objects exist independently measurement and where influences cannot travel faster than speed light. Bell's theorem states that this incompatible with predictions quantum mechanics, as expressed inequalities. Previous experiments convincingly supported predictions. Yet, every experiment requires assumptions provide loopholes for a local realist explanation. Here, we report Bell test closes most significant these simultaneously....
We present a loophole-free violation of local realism using entangled photon pairs. ensure that all relevant events in our Bell test are spacelike separated by placing the parties far enough apart and fast random number generators high-speed polarization measurements. A high-quality polarization-entangled source photons, combined with high-efficiency, low-noise, single-photon detectors, allows us to make measurements without requiring any fair-sampling assumptions. Using hypothesis test, we...
Abstract A quantum computer attains computational advantage when outperforming the best classical computers running best-known algorithms on well-defined tasks. No photonic machine offering programmability over all its gates has demonstrated advantage: previous machines 1,2 were largely restricted to static gate sequences. Earlier demonstrations also vulnerable spoofing 3 , in which heuristics produce samples, without direct simulation, lying closer ideal distribution than do samples from...
We present a source of entangled photons that violates Bell inequality free the "fair-sampling" assumption, by over 7 standard deviations. This violation is first reported experiment with to close detection loophole, and we demonstrate enough "efficiency" overhead eventually perform fully loophole-free test local realism. The entanglement quality verified maximally violating additional tests, testing upper limit quantum correlations. Finally, use generate "device-independent" private random...
Quantum steering allows two parties to verify shared entanglement even if one measurement device is untrusted. A conclusive demonstration of through the violation a inequality considerable fundamental interest and opens up applications in quantum communication. To date all experimental tests with single photon states have relied on post-selection, allowing untrusted devices cheat by hiding unfavourable events losses. Here we close this "detection loophole" combining highly efficient source...
Conventional quantum key distribution (QKD) typically uses binary encoding based on photon polarization or time-bin degrees of freedom and achieves a capacity at most one bit per photon. Under photon-starved conditions the rate detection events is much lower than generation rate, because losses in long distance propagation relatively recovery times available single-photon detectors. Multi-bit arrival can be beneficial such situations. Recent security proofs indicate high-dimensional robust...
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text L. K. Shalm, E. Meyer-Scott, B. G. Christensen, P. Bierhorst, M. A. Wayne, J. Stevens, T. Gerrits, S. Glancy, D. R. Hamel, Allman, Coakley, Dyer, C. Hodge, Lita, V. Verma, Lambrocco, Tortorici, Migdall, Y. Zhang, Kumor, W. H. Farr, F. Marsili, Shaw, Stern, Abellán, Amaya, Pruneri, Jennewein, Mitchell, Kwiat, Bienfang, Mirin, Knill, and Nam, "A strong loophole-free test...
We have created heralded coherent state superpositions (CSS), by subtracting up to three photons from a pulse of squeezed vacuum light. To produce such CSSs at sufficient rate, we used our high-efficiency photon-number-resolving transition edge sensor detect the subtracted photons. This is first experiment enabled and utilizing full capabilities this detector. The CSS produced three-photon subtraction had mean photon number 2.75 -0.24/+0.06 fidelity 0.59 -0.14/+0.04 with an ideal CSS....
We generate pulsed, two mode squeezed states in a single spatio-temporal with mean photon numbers up to 20. directly measure photon-number-correlations between the modes transition edge sensors 80 photons per mode. This corresponds roughly state-dimensionality of 6400. achieve detection efficiencies 64% technologically crucial telecom regime and demonstrate high quality our measurements by heralded nonclassical distributions 50 pulse calculated correlation functions 40th order.
Nanophotonic resonators can generate broadband quadrature squeezing and single temporal mode photon number difference squeezing.
Excitation with entangled photon pairs may lead to an increase in the efficiency of two-photon absorption at low flux. The corresponding process, (E2PA), has been investigated numerous theoretical and experimental studies. However, significant ambiguity inconsistency remain literature about absolute values E2PA cross sections. Here, we use a fluorescence-based registration scheme experimentally determine upper bounds on sections for six fluorophores. These are up 4 orders magnitude lower...
Abstract Entanglement plays a vital role in quantum information processing. Owing to its unique material properties, silicon carbide recently emerged as promising candidate for the scalable implementation of advanced processing capabilities. To date, however, only entanglement nuclear spins has been reported carbide, while an entangled photon source, whether it is based on bulk or chip-scale technologies, remained elusive. Here, we report demonstration source integrated platform first time....
Superconducting transition-edge sensors (TES) are extremely sensitive microcalorimeters used as photon detectors with unparalleled energy resolution. They have found application from measuring astronomical spectra through to determining the quantum property of photon-number, <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow class="MJX-TeXAtom-ORD"><mml:mover><mml:mi>n</mml:mi><mml:mo stretchy="false">&#x005E;</mml:mo></mml:mover></mml:mrow><mml:mrow...
Integration is currently the only feasible route toward scalable photonic quantum processing devices that are sufficiently complex to be genuinely useful in computing, metrology, and simulation. Embedded on-chip detection will critical such devices. We demonstrate an integrated photon-number-resolving detector, operating telecom band at 1550 nm, employing evanescently coupled design allows it placed arbitrary locations within a planar circuit. Up five photons resolved guided optical mode via...
We demonstrate a 64-pixel free-space-coupled array of superconducting nanowire single photon detectors optimized for high detection efficiency in the near-infrared range. An integrated, readily scalable, multiplexed readout scheme is employed to reduce number lines 16. The cryogenic, optical, and electronic packaging read out as well characterization measurements are discussed.
We characterize a periodically poled KTP crystal that produces an entangled, two-mode, squeezed state with orthogonal polarizations, nearly identical, factorizable frequency modes, and few photons in unwanted modes. focus the pump beam to create circular joint spectral probability distribution between two After disentangling we observe Hong-Ou-Mandel interference raw (background corrected) visibility of 86 % (95 %) when 8.6 nm bandwidth filter is applied. measure second order photon...
Single photons are an important prerequisite for a broad spectrum of quantum optical applications. We experimentally demonstrate heralded single-photon source based on spontaneous parametric down-conversion in collinear bulk optics, and fiber-coupled bolometric transition-edge sensors. Without correcting background, losses, or detection inefficiencies, we measure overall heralding efficiency 83 %. By violating Bell inequality, confirm the character high-quality entanglement our single which,...
The integrated optical circuit is a promising architecture for the realization of complex quantum states and information networks.One element that required many these applications highefficiency photon detector capable photon-number discrimination.We present an photonic system in telecom band at 1550 nm based on UV-written silica-on-silicon waveguides modified transition-edge sensors number resolution over 40 % efficiency.Exploiting mode transmission failure devices, we multiplex three...