A5020244795- Quantum Information and Cryptography
- Quantum Mechanics and Applications
- Statistical Mechanics and Entropy
- Quantum Computing Algorithms and Architecture
- Advanced Fluorescence Microscopy Techniques
- Computability, Logic, AI Algorithms
- Biofield Effects and Biophysics
- Orbital Angular Momentum in Optics
- Distributed systems and fault tolerance
- Mechanical and Optical Resonators
- Radiation Detection and Scintillator Technologies
- Constraint Satisfaction and Optimization
- Computational Physics and Python Applications
- Molecular spectroscopy and chirality
- Advanced Thermodynamics and Statistical Mechanics
- Cryptography and Data Security
- Advanced Statistical Methods and Models
- Spectroscopy and Quantum Chemical Studies
- History and advancements in chemistry
- Engineering Diagnostics and Reliability
- Philosophy and Theoretical Science
- Physical Unclonable Functions (PUFs) and Hardware Security
- Radioactive Decay and Measurement Techniques
- Photoacoustic and Ultrasonic Imaging
- Scientific Computing and Data Management
University of New Orleans
2018-2024
National Institute of Standards and Technology
2015-2020
Information Technology Laboratory
2016
Tulane University
2014-2015
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...
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...
The quantum statistical fluctuations of the electromagnetic field establish a limit, known as shot-noise on sensitivity optical measurements performed with classical technologies. However, technologies are not constrained by this limit. In regard, possibility using every photon produced sources light to estimate small physical parameters, beyond constitutes one main goals optics. Here we experimentally demonstrate scalable protocol for quantum-enhanced phase estimation across broad range...
Recent experiments have reached detection efficiencies sufficient to close the loophole, testing Clauser-Horne (CH) version of Bell's inequality. For a similar future experiment be completely loophole-free, it will important discrete experimental trials with randomized measurement settings for each trial, and statistical analysis should not overlook possibility local state varying over time possible dependence on earlier (the "memory loophole"). In this paper, mathematical model such CH is...
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...
We introduce probability estimation, a broadly applicable framework to certify randomness in finite sequence of measurements subject verifiable physical constraints and with respect classical side information. Examples include from single-photon device-independent Bell tests. Advantages estimation unproblematic early stopping when goals are achieved, optimal rates, applicability tests small violations, unsurpassed finite-data efficiency. greatly reduce latencies for producing random bits...
We report correlation measurements on two ^{9}Be^{+} ions that violate a chained Bell inequality obeyed by any local-realistic theory. The correlations can be modeled as derived from mixture of probabilistic distribution and violates the inequality. A statistical framework is formulated to quantify fraction allowable in observed without fair-sampling or independent-and-identical-distributions assumptions. exclude models our experiment whose above 0.327 at 95% confidence level. This bound...
In this work, we introduce multipartite intrinsic non-locality as a method for quantifying resources in the scenario of device-independent (DI) conference key agreement. We prove that is additive, convex, and monotone under class free operations called local common randomness. As one our technical contributions, establish chain rule two variants mutual information, which then use to additive. This may be independent interest other contexts. All these properties are helpful establishing main...
In the well-studied (2, 2, 2) Bell experiment consisting of two parties, measurement settings per party, and possible outcomes setting, it is known that if obeys no-signaling constraints, then set admissible experimental probability distributions fully characterized as convex hull 24 distributions: 8 Popescu-Rohrlich (PR) boxes 16 local deterministic distributions. Furthermore, turns out in case, any nonlocal nonsignaling distribution can always be uniquely expressed a combination exactly...
Many three-party correlations, including some that are commonly described as genuinely tripartite nonlocal, can be simulated by a network of underlying subsystems display only bipartite nonsignaling nonlocal behavior. Quantum mechanics predicts correlations admit no such simulation, suggesting there versions nonlocality in nature transcending the phenomenon nonlocality. This paper introduces rigorous framework for analyzing bipartite-only networks. We confirm expected properties so-obtained...
According to recent new definitions, a multi-party behavior is genuinely multipartite nonlocal (GMNL) if it cannot be modeled by measurements on an underlying network of bipartite-only resources, possibly supplemented with local (classical) resources shared all parties. The definitions differ whether allow entangled upon, and/or superquantum behaviors among, the bipartite resources. Here, we categorize full hierarchy these candidate GMNL in three-party quantum networks, highlighting intimate...
The authors use probability estimation in the general situation where randomness can be extracted from a sequence of private data determined an arbitrary way by settings-dependent measurement outcomes each trial.
Random numbers are an important resource for applications such as numerical simulation and secure communication. However, it is difficult to certify whether a physical random number generator truly unpredictable. Here, we exploit the phenomenon of quantum nonlocality in loophole-free photonic Bell test experiment generation randomness that cannot be predicted within any theory allows one make independent measurement choices prohibits superluminal signaling. To quantify randomness, describe...
We classify the extreme points of a polytope probability distributions in (2,2,2) CHSH-Bell setting that is induced by single Tsirelson bound. do same for class polytopes obtained from parametrized family multiple bounds interacting non-trivially. Such constructions can be applied to device-independent random number generation using method estimation factors [Phys. Rev. A, 98:040304(R), 2018]. demonstrate meaningful improvement certified randomness applying new characterized here.
We demonstrate the first protocol for quantum-enhanced phase estimation without pre- and post-selected measurements. Our experiment, with an overall efficiency of 82%, utilizes two-mode squeezed vacuum states photon-number-resolving detection to surpass standard quantum limit.
Recent experiments have reached detection efficiencies sufficient to close the loophole with photons. Both ran multiple successive trials in fixed measurement configurations, rather than randomly re-setting configurations before each trial. This opens a new potential for local hidden variable theory. The invalidates one proposed method of statistical analysis experimental results, as demonstrated this note. Therefore different will be necessary definitively assert that these are subject only...
The probability estimation framework involves direct of the occurrences outcomes conditioned on measurement settings and side information. It is a powerful tool for certifying randomness in quantum nonlocality experiments. In this paper, we present self-contained proof asymptotic optimality method. Our approach refines earlier results to allow better characterisation optimal adversarial attacks protocol. We apply these (2,2,2) Bell scenario, obtaining an analytic bound by no-signalling...
This paper examines networks of $n$ measuring parties sharing $m$ independent nonsignaling resources that can be locally wired together: is, each party follows a scheme to measure the in cascaded fashion with inputs later possibly depending on outputs earlier-measured ones. A specific framework is provided for studying probability distributions arising such networks, and this used directly prove some accepted, but often only implicitly invoked, facts: there uniquely determined well-defined...
Recent advancements in network nonlocality have led to the concept of local operations and shared randomness-based genuine multipartite (LOSR-GMNL). In this paper, we consider two recent experimental demonstrations LOSR-GMNL, focusing on a tripartite scenario where goal is exhibit correlations impossible each two-party subset shares bipartite resources every party has access unlimited randomness. Traditional statistical analyses measuring violations witnessing inequalities by number standard...
Abstract This paper examines networks of n measuring parties sharing m nonsignaling resources that can be locally wired together: is, each party follows a scheme to measure the in cascaded fashion with inputs later possibly depending on outputs earlier-measured ones. A specific framework is provided for studying probability distributions arising such networks, and this used directly prove some accepted, but often only implicitly invoked, facts: there uniquely determined well-defined joint...