A5059983839- Pulsars and Gravitational Waves Research
- Geophysics and Sensor Technology
- Gamma-ray bursts and supernovae
- Cosmology and Gravitation Theories
- Mechanical and Optical Resonators
- Astrophysical Phenomena and Observations
- High-pressure geophysics and materials
- Geophysics and Gravity Measurements
- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Subatomic Physics Research
- Advanced Frequency and Time Standards
- Astronomical Observations and Instrumentation
- Radio Astronomy Observations and Technology
- Seismic Waves and Analysis
- Magnetic confinement fusion research
- Mechanics and Biomechanics Studies
- Metabolomics and Mass Spectrometry Studies
- Adaptive optics and wavefront sensing
- Radiology practices and education
- Astrophysics and Cosmic Phenomena
- Statistical and numerical algorithms
- Biochemical Analysis and Sensing Techniques
- Solar and Space Plasma Dynamics
- Dark Matter and Cosmic Phenomena
- Force Microscopy Techniques and Applications
Massachusetts Institute of Technology
2018-2024
California Institute of Technology
2024
Intel (United States)
2023
LIGO Scientific Collaboration
2021
Kavli Institute for Particle Astrophysics and Cosmology
2019
ARC Centre of Excellence for Gravitational Wave Discovery
2017-2018
Monash University
2014-2018
Monell Chemical Senses Center
2007
The Laser Interferometer Gravitational Wave Observatory (LIGO) has been directly detecting gravitational waves from compact binary mergers since 2015. We report on the first use of squeezed vacuum states in direct measurement with Advanced LIGO H1 and L1 detectors. This achievement is culmination decades research to implement gravitational-wave During ongoing O3 observation run, are improving sensitivity interferometers signals above 50 Hz by up 3 dB, thereby increasing expected detection...
The first detection of gravitational waves by the Laser Interferometer Gravitational-Wave Observatory (LIGO) in 2015 launched era gravitational-wave astronomy. quest for signals from objects that are fainter or farther away impels technological advances to realize ever more sensitive detectors. Since 2019, one advanced technique, injection squeezed states light, is being used improve shot-noise limit sensitivity Advanced LIGO detectors, at frequencies above ∼50 Hz. Below this frequency,...
The motion of a mechanical object, even human-sized should be governed by the rules quantum mechanics. Coaxing them into state is, however, difficult because thermal environment masks any signature object's motion. also effects proposed modifications mechanics at large mass scales. We prepared center-of-mass 10-kilogram oscillator in with an average phonon occupation 10.8. reduction temperature, from room temperature to 77 nanokelvin, is commensurate 11 orders-of-magnitude suppression...
Abstract : Humans emit a complex array of volatile and nonvolatile molecules that are influenced by an individual's genetics, health, diet, stress. Olfaction is the most ancient our distal senses may be used to evaluate food environmental toxins as well recognize kin potential predators. Many body odors evolved olfactory messengers, which convey information between individuals. Consequently, those practicing healing arts have olfaction aid in their diagnosis disease since dawn medical...
Gravitational waves detected by advanced ground-based detectors have allowed studying the Universe in a way which is fully complementary to electromagnetic observations. As more sources are detected, it will be possible measure properties of local population black holes and neutron stars, including their mass spin distributions. Once at design sensitivity, existing instruments able detect heavy binary redshifts $\ensuremath{\sim}1$. Significant upgrades current facilities could increase...
Thermal decoherence impedes preparing massive objects in quantum states. Using feedback cooling, we place the center-of-mass motion of a 10kg oscillator state with phonon occupation 10 . 8, bringing it from room temperature to 77 nK.
We investigate the ability of current and third-generation gravitational wave (GW) detectors to determine delay time distribution (DTD) binary neutron stars (BNS) through a direct measurement BNS merger rate as function redshift. assume that DTD follows power law with slope $\Gamma$ minimum $t_{\rm min}$, also allow overall formation efficiency per unit stellar mass vary. By convolving cosmic star history, then GW detector capabilities, we explore two relevant regimes. First, for generation...
Squeezed light has become a standard technique to enhance the sensitivity of gravitational wave detectors. Both optical losses and phase noise in squeezed path can degrade achievable improvements. Phase be mitigated by having high bandwidth servo stabilize squeezer from interferometer. In advanced LIGO, this control loop is limited 4 km arm cavity free spectral range about ~15 kHz. Future generation gravitational-wave detectors are designed employ much longer cavities. For cosmic explorer...
Vacuum quantum fluctuations impose a fundamental limit on the sensitivity of gravitational-wave interferometers, which rank among most sensitive precision measurement devices ever built. The injection conventional squeezed vacuum reduces noise in one quadrature at expense increasing other. While this approach improved Advanced LIGO and Virgo interferometers during their third observing run (O3), future improvements arm power squeezing levels will bring radiation pressure to forefront....
Quantum vacuum fluctuations fundamentally limit the precision of optical measurements, such as those in gravitational-wave detectors. Injection conventional squeezed can be used to reduce quantum noise readout quadrature, but this reduction is at cost increasing orthogonal quadrature. For detectors near limits imposed by radiation pressure (QRPN), both quadratures impact measurement, and benefits squeezing are limited. In paper, we demonstrate use a critically-coupled 16m cavity diminish...
Squeezed vacuum states are now employed in gravitational-wave interferometric detectors, enhancing their sensitivity and thus enabling richer astrophysical observations. In future observing runs, the detectors will incorporate a filter cavity to suppress quantum radiation pressure noise using frequency-dependent squeezing. Interferometers employing internal external cavities decohere degrade squeezing complex new ways, which must be studied achieve increasingly ambitious goals. This paper...
Machine learning has become an effective tool for processing the extensive datasets produced by large physics experiments. Gravitational-wave detectors are now listening to universe with quantum-enhanced sensitivity, accomplished injection of squeezed vacuum states. Squeezed state preparation and is operationally complicated, as well highly sensitive environmental fluctuations variations in interferometer state. Achieving maintaining optimal squeezing levels a challenging problem will...
Thermal decoherence impedes preparing massive objects in quantum states. Using feedback cooling, we place the center-of-mass motion of a 10 kg oscillator state with phonon occupation 10.8, bringing it from room temperature to 77 nK.
Contemporary gravitational-wave detectors are fundamentally limited by thermal noise -- due to dissipation in the mechanical elements of test mass and quantum from vacuum fluctuations optical field used probe position. Two other fundamental noises can principle also limit sensitivity: test-mass quantization zero-point fluctuation its modes, excitation field. We use fluctuation-dissipation theorem unify all four noises. This unified picture shows precisely when be ignored.
Contemporary gravitational-wave detectors are fundamentally limited by thermal noise-due to dissipation in the mechanical elements of test mass-and quantum noise-from vacuum fluctuations optical field used probe test-mass position. Two other fundamental noises can principle also limit sensitivity: quantization noise due zero-point fluctuation its modes and excitation field. We use fluctuation-dissipation theorem unify all four noises. This unified picture shows precisely when be ignored.