Prof. Dr. Fabio Postiglione

University of Salerno, Fisciano, Italy

Prof. Dr. Fabio Postiglione

University of Salerno, Fisciano, Italy

Co-authors

Following

Followers

Research Focus & Metrics

Explore full metrics on Scilit

Academic Career Length

27Years (2000-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications

21 July 2013 in Nature Photonics

Journal Article

Enhanced sensitivity of the LIGO gravitational wave detector by using squeezed states of light

J. Aasi

J. Abadie

B. P. Abbott

R. Abbott

T. D. Abbott

J. Zweizig

+653

Nearly a century after Einstein first predicted the existence of gravitational waves, a global network of Earth-based gravitational wave observatories^1,2,3,4 is seeking to directly detect this faint radiation using precision laser interferometry. Photon shot noise, due to the quantum nature of light, imposes a fundamental limit on the attometre-level sensitivity of the kilometre-scale Michelson interferometers deployed for this task. Here, we inject squeezed states to improve the performance of one of the detectors of the Laser Interferometer Gravitational-Wave Observatory (LIGO) beyond the quantum noise limit, most notably in the frequency region down to 150 Hz, critically important for several astrophysical sources, with no deterioration of performance observed at any frequency. With the injection of squeezed states, this LIGO detector demonstrated the best broadband sensitivity to gravitational waves ever achieved, with important implications for observing the gravitational-wave Universe with unprecedented sensitivity.

30 June 2009 in Reports on Progress in Physics

Journal Article

LIGO: the Laser Interferometer Gravitational-Wave Observatory

B P Abbott

R Abbott

R Adhikari

P Ajith

B Allen

J Zweizig

+495

16 July 2010 in Classical and Quantum Gravity

Journal Article

Predictions for the rates of compact binary coalescences observable by ground-based gravitational-wave detectors

J Abadie

B P Abbott

R Abbott

M Abernathy

T Accadia

K Belczynski

+705

11 September 2011 in Nature Physics

Journal Article

A gravitational wave observatory operating beyond the quantum shot-noise limit

The LIGO Scientific Collaboration

J. Abadie

B. P. Abbott

R. Abbott

T. D. Abbott

J. Zweizig

+609

Around the globe several observatories are seeking the first direct detection of gravitational waves (GWs). These waves are predicted by Einstein’s general theory of relativity¹ and are generated, for example, by black-hole binary systems². Present GW detectors are Michelson-type kilometre-scale laser interferometers measuring the distance changes between mirrors suspended in vacuum. The sensitivity of these detectors at frequencies above several hundred hertz is limited by the vacuum (zero-point) fluctuations of the electromagnetic field. A quantum technology—the injection of squeezed light³—offers a solution to this problem. Here we demonstrate the squeezed-light enhancement of GEO 600, which will be the GW observatory operated by the LIGO Scientific Collaboration in its search for GWs for the next 3–4 years. GEO 600 now operates with its best ever sensitivity, which proves the usefulness of quantum entanglement and the qualification of squeezed light as a key technology for future GW astronomy⁴.

19 April 2012 in Physical Review D

Journal Article

Search for gravitational waves from low mass compact binary coalescence in LIGO’s sixth science run and Virgo’s science runs 2 and 3

J. Abadie

B. P. Abbott

R. Abbott

T. D. Abbott

M. Abernathy

J. Zweizig

+790

We report on a search for gravitational waves from coalescing compact binaries using LIGO and Virgo observations between July 7, 2009, and October 20, 2010. We searched for signals from binaries with total mass between 2 and

25 M_{⊙}

; this includes binary neutron stars, binary black holes, and binaries consisting of a black hole and neutron star. The detectors were sensitive to systems up to 40 Mpc distant for binary neutron stars, and further for higher mass systems. No gravitational-wave signals were detected. We report upper limits on the rate of compact binary coalescence as a function of total mass, including the results from previous LIGO and Virgo observations. The cumulative 90% confidence rate upper limits of the binary coalescence of binary neutron star, neutron star-black hole, and binary black hole systems are

1.3 \times 10^{- 4}

3.1 \times 10^{- 5}

, and

6.4 \times 10^{- 6} {Mpc}^{- 3} {yr}^{- 1}

, respectively. These upper limits are up to a factor 1.4 lower than previously derived limits. We also report on results from a blind injection challenge.

4 September 2013 in Physical Review D

Journal Article

Parameter estimation for compact binary coalescence signals with the first generation gravitational-wave detector network

J. Aasi

J. Abadie

B. P. Abbott

R. Abbott

T. D. Abbott

J. Zweizig

+795

Compact binary systems with neutron stars or black holes are one of the most promising sources for ground-based gravitational-wave detectors. Gravitational radiation encodes rich information about source physics; thus parameter estimation and model selection are crucial analysis steps for any detection candidate events. Detailed models of the anticipated waveforms enable inference on several parameters, such as component masses, spins, sky location and distance, that are essential for new astrophysical studies of these sources. However, accurate measurements of these parameters and discrimination of models describing the underlying physics are complicated by artifacts in the data, uncertainties in the waveform models and in the calibration of the detectors. Here we report such measurements on a selection of simulated signals added either in hardware or software to the data collected by the two LIGO instruments and the Virgo detector during their most recent joint science run, including a “blind injection” where the signal was not initially revealed to the collaboration. We exemplify the ability to extract information about the source physics on signals that cover the neutron-star and black-hole binary parameter space over the component mass range

1 M_{⊙} - 25 M_{⊙}

and the full range of spin parameters. The cases reported in this study provide a snapshot of the status of parameter estimation in preparation for the operation of advanced detectors.

About Me

Fabio Postiglione is an Associate Professor of Statistics (SECS-S/02), Dept. of Information and Electrical Engineering and Applied Mathematics (DIEM), University of Salerno. He holds a course of Statistical Data Analysis and a course of Applied Statistics, and in the past also courses of Design of Experiments and Data Analysis and Signal Processing. In the past, from 1999 to July 2000, he held a Research Fellowship at University of Sannio; from July 2000 to April 2002, he worked as a research engineer at Tin.it R&D Dept. (Telecom Italia Group). His main research interests include reliability theory, Bayesian statistics, availability of technological systems, stochastic processes, statistical learning, data science. He is/has been involved in many European (FP7, H2020) and Italian research projects. Prof. Postiglione is member of the Editorial Board of "Electronics" and "Analytics" (MDPI), and he was also involved in the Technical Program Committees of many international symposia. He serves as referee for some international journals on statistics, reliability and telecommunications. He is member of Italian Statistical Society (SIS), the LIGO-VIRGO Scientific Collaboration (LVC), the Italian National Inter-University Consortium for Telecommunications (CNIT) and past member of the Italian National Institute of Nuclear Physics (INFN). He is the (co-)author of more than 120 papers, published in peer-reviewed international journals and conference proceedings, and 1 European Patent.

Prof. Dr. Fabio Postiglione

Prof. Dr. Fabio Postiglione

Research Focus & Metrics

Academic Career Length

Publication Type Breakdown

Representative Publications

About Me