Article records
https://feeds.library.caltech.edu/people/Yang-Huan/article.rss
A Caltech Library Repository Feedhttp://www.rssboard.org/rss-specificationpython-feedgenenTue, 16 Apr 2024 14:33:59 +0000Preparing a Mechanical Oscillator in Non-Gaussian Quantum States
https://resolver.caltech.edu/CaltechAUTHORS:20100830-093808929
Authors: {'items': [{'id': 'Khalili-F-Ya', 'name': {'family': 'Khalili', 'given': 'Farid'}}, {'id': 'Danilishin-S', 'name': {'family': 'Danilishin', 'given': 'Stefan'}}, {'id': 'Miao-Haixing', 'name': {'family': 'Miao', 'given': 'Haixing'}, 'orcid': '0000-0003-2879-5821'}, {'id': 'Müller-Ebhardt-H', 'name': {'family': 'Müller-Ebhardt', 'given': 'Helge'}}, {'id': 'Yang-Huan', 'name': {'family': 'Yang', 'given': 'Huan'}}, {'id': 'Chen-Yanbei', 'name': {'family': 'Chen', 'given': 'Yanbei'}, 'orcid': '0000-0002-9730-9463'}]}
Year: 2010
DOI: 10.1103/PhysRevLett.105.070403
We propose a protocol for coherently transferring non-Gaussian quantum states from an optical field to a mechanical oscillator. We demonstrate its experimental feasibility in future gravitational-wave detectors and tabletop optomechanical devices. This work not only outlines a feasible way to investigate nonclassicality in macroscopic optomechanical systems, but also presents a new and elegant approach for solving non-Markovian open quantum dynamics in general linear systems.https://authors.library.caltech.edu/records/vxtw0-wyk94Nonadiabatic elimination of auxiliary modes in continuous quantum measurements
https://resolver.caltech.edu/CaltechAUTHORS:20120516-130749358
Authors: {'items': [{'id': 'Yang-Huan', 'name': {'family': 'Yang', 'given': 'Huan'}}, {'id': 'Miao-Haixing', 'name': {'family': 'Miao', 'given': 'Haixing'}, 'orcid': '0000-0003-2879-5821'}, {'id': 'Chen-Yanbei', 'name': {'family': 'Chen', 'given': 'Yanbei'}, 'orcid': '0000-0002-9730-9463'}]}
Year: 2012
DOI: 10.1103/PhysRevA.85.040101
In quantum measurement or control processes, there are often auxiliary modes coupling to the quantum system that we are interested in—they together form a bath or an environment for the system. The bath can have finite memory (non-Markovian), and simply ignoring its dynamics (i.e., adiabatically eliminating it) will prevent us from predicting the true quantum behavior of the system. We generalize the technique introduced by Strunz et al. [Phys. Rev. Lett. 82 1801 (1999)], and develop a formalism that allows us to eliminate the bath nonadiabatically in continuous quantum measurements, and obtain a non-Markovian stochastic master equation for the system that we focus on. This formalism also illuminates how to design the bath—acting as a quantum filter—to effectively probe interesting system observables (e.g., the quantum-nondemolition observable).https://authors.library.caltech.edu/records/a91eg-2d717Quantum back-action in measurements of zero-point mechanical oscillations
https://resolver.caltech.edu/CaltechAUTHORS:20121102-094112588
Authors: {'items': [{'id': 'Khalili-F-Ya', 'name': {'family': 'Khalili', 'given': 'Farid Ya.'}}, {'id': 'Miao-Haixing', 'name': {'family': 'Miao', 'given': 'Haixing'}, 'orcid': '0000-0003-2879-5821'}, {'id': 'Yang-Huan', 'name': {'family': 'Yang', 'given': 'Huan'}}, {'id': 'Safavi-Naeini-A-H', 'name': {'family': 'Safavi-Naeini', 'given': 'Amir H.'}, 'orcid': '0000-0001-6176-1274'}, {'id': 'Painter-O', 'name': {'family': 'Painter', 'given': 'Oskar'}, 'orcid': '0000-0002-1581-9209'}, {'id': 'Chen-Yanbei', 'name': {'family': 'Chen', 'given': 'Yanbei'}, 'orcid': '0000-0002-9730-9463'}]}
Year: 2012
DOI: 10.1103/PhysRevA.86.033840
Measurement-induced back-action, a direct consequence of the Heisenberg uncertainty principle, is the defining feature of quantum measurements. We use quantum measurement theory to analyze the recent experiment of Safavi-Naeini et al. [Phys. Rev. Lett. 108 033602 (2012)], and show that the results of this experiment not only characterize the zero-point fluctuation of a near-ground-state nanomechanical oscillator, but also demonstrate the existence of quantum back-action noise—through correlations that exist between sensing noise and back-action noise. These correlations arise from the quantum coherence between the mechanical oscillator and the measuring device, which build up during the measurement process, and are key to improving sensitivities beyond the standard quantum limit.https://authors.library.caltech.edu/records/ka0xj-bxp15Quasinormal-mode spectrum of Kerr black holes and its geometric interpretation
https://resolver.caltech.edu/CaltechAUTHORS:20121130-131913080
Authors: {'items': [{'id': 'Yang-Huan', 'name': {'family': 'Yang', 'given': 'Huan'}}, {'id': 'Nichols-D-A', 'name': {'family': 'Nichols', 'given': 'David A.'}}, {'id': 'Zhang-Fan', 'name': {'family': 'Zhang', 'given': 'Fan'}, 'orcid': '0000-0002-3643-018X'}, {'id': 'Zimmerman-A', 'name': {'family': 'Zimmerman', 'given': 'Aaron'}}, {'id': 'Zhang-Zhongyang', 'name': {'family': 'Zhang', 'given': 'Zhongyang'}}, {'id': 'Chen-Yanbei', 'name': {'family': 'Chen', 'given': 'Yanbei'}, 'orcid': '0000-0002-9730-9463'}]}
Year: 2012
DOI: 10.1103/PhysRevD.86.104006
There is a well-known, intuitive geometric correspondence between high-frequency quasinormal modes of Schwarzschild black holes and null geodesics that reside on the light ring (often called spherical photon orbits): the real part of the mode's frequency relates to the geodesic's orbital frequency, and the imaginary part of the frequency corresponds to the Lyapunov exponent of the orbit. For slowly rotating black holes, the quasinormal mode's real frequency is a linear combination of the orbit's precessional and orbital frequencies, but the correspondence is otherwise unchanged. In this paper, we find a relationship between the quasinormal-mode frequencies of Kerr black holes of arbitrary (astrophysical) spins and general spherical photon orbits, which is analogous to the relationship for slowly rotating holes. To derive this result, we first use the Wentzel-Kramers-Brillouin approximation to compute accurate algebraic expressions for large-l quasinormal-mode frequencies. Comparing our Wentzel-Kramers-Brillouin calculation to the leading-order, geometric-optics approximation to scalar-wave propagation in the Kerr spacetime, we then draw a correspondence between the real parts of the parameters of a quasinormal mode and the conserved quantities of spherical photon orbits. At next-to-leading order in this comparison, we relate the imaginary parts of the quasinormal-mode parameters to coefficients that modify the amplitude of the scalar wave. With this correspondence, we find a geometric interpretation of two features of the quasinormal-mode spectrum of Kerr black holes: First, for Kerr holes rotating near the maximal rate, a large number of modes have nearly zero damping; we connect this characteristic to the fact that a large number of spherical photon orbits approach the horizon in this limit. Second, for black holes of any spins, the frequencies of specific sets of modes are degenerate; we find that this feature arises when the spherical photon orbits corresponding to these modes form closed (as opposed to ergodically winding) curves.https://authors.library.caltech.edu/records/02t36-k4v81Brownian thermal noise in multilayer coated mirrors
https://resolver.caltech.edu/CaltechAUTHORS:20130506-133132281
Authors: {'items': [{'id': 'Hong-Ting', 'name': {'family': 'Hong', 'given': 'Ting'}}, {'id': 'Yang-Huan', 'name': {'family': 'Yang', 'given': 'Huan'}}, {'id': 'Gustafson-E-K', 'name': {'family': 'Gustafson', 'given': 'Eric K.'}}, {'id': 'Adhikari-R-X', 'name': {'family': 'Adhikari', 'given': 'Rana X.'}, 'orcid': '0000-0002-5731-5076'}, {'id': 'Chen-Yanbei', 'name': {'family': 'Chen', 'given': 'Yanbei'}, 'orcid': '0000-0002-9730-9463'}]}
Year: 2013
DOI: 10.1103/PhysRevD.87.082001
We analyze the Brownian thermal noise of a multilayer dielectric coating used in high-precision optical measurements, including interferometric gravitational-wave detectors. We assume the coating material to be isotropic, and therefore study thermal noises arising from shear and bulk losses of the coating materials. We show that coating noise arises not only from layer thickness fluctuations, but also from fluctuations of the interface between the coating and substrate, driven by fluctuating shear stresses of the coating. Although thickness fluctuations of different layers are statistically independent, there exists a finite coherence between the layers and the substrate-coating interface. In addition, photoelastic coefficients of the thin layers (so far not accurately measured) further influence the thermal noise, although at a relatively low level. Taking into account uncertainties in material parameters, we show that significant uncertainties still exist in estimating coating Brownian noise.https://authors.library.caltech.edu/records/yqr1z-1bk15Macroscopic Quantum Mechanics in a Classical Spacetime
https://resolver.caltech.edu/CaltechAUTHORS:20130524-102529232
Authors: {'items': [{'id': 'Yang-Huan', 'name': {'family': 'Yang', 'given': 'Huan'}}, {'id': 'Miao-Haixing', 'name': {'family': 'Miao', 'given': 'Haixing'}, 'orcid': '0000-0003-2879-5821'}, {'id': 'Lee-Da-Shin', 'name': {'family': 'Lee', 'given': 'Da-Shin'}}, {'id': 'Helou-B', 'name': {'family': 'Helou', 'given': 'Bassam'}}, {'id': 'Chen-Yanbei', 'name': {'family': 'Chen', 'given': 'Yanbei'}, 'orcid': '0000-0002-9730-9463'}]}
Year: 2013
DOI: 10.1103/PhysRevLett.110.170401
We apply the many-particle Schrödinger-Newton equation, which describes the coevolution of a many-particle quantum wave function and a classical space-time geometry, to macroscopic mechanical objects. By averaging over motions of the objects' internal degrees of freedom, we obtain an effective Schrödinger-Newton equation for their centers of mass, which can be monitored and manipulated at quantum levels by state-of-the-art optomechanics experiments. For a single macroscopic object moving quantum mechanically within a harmonic potential well, its quantum uncertainty is found to evolve at a frequency different from its classical eigenfrequency—with a difference that depends on the internal structure of the object—and can be observable using current technology. For several objects, the Schrödinger-Newton equation predicts semiclassical motions just like Newtonian physics, yet quantum uncertainty cannot be transferred from one object to another.https://authors.library.caltech.edu/records/r194x-gvz69Quasinormal modes of weakly charged Kerr-Newman spacetimes
https://resolver.caltech.edu/CaltechAUTHORS:20150420-095429341
Authors: {'items': [{'id': 'Mark-Z', 'name': {'family': 'Mark', 'given': 'Zachary'}}, {'id': 'Yang-Huan', 'name': {'family': 'Yang', 'given': 'Huan'}}, {'id': 'Zimmerman-A', 'name': {'family': 'Zimmerman', 'given': 'Aaron'}}, {'id': 'Chen-Yanbei', 'name': {'family': 'Chen', 'given': 'Yanbei'}, 'orcid': '0000-0002-9730-9463'}]}
Year: 2015
DOI: 10.1103/PhysRevD.91.044025
The resonant mode spectrum of the Kerr-Newman spacetime is presently unknown. These modes, called the quasinormal modes, play a central role in determining the stability of Kerr-Newman black holes and their response to perturbations. We present a new formalism, generalized from time-independent perturbation theory in quantum mechanics, for calculating the quasinormal mode frequencies of weakly charged Kerr-Newman spacetimes of arbitrary spin. Our method makes use of an original technique for applying perturbation theory to zeroth-order solutions that are not square-integrable, and it can be applied to other problems in theoretical physics. The new formalism reveals no unstable modes, which together with previous results in the slow-rotation limit strongly indicates the modal stability of the Kerr-Newman spacetime. Our techniques and results are of interest in the areas of holographic duality, foundational problems in general relativity, and possibly in astrophysical systems.https://authors.library.caltech.edu/records/4essy-e4616Testing gravity with pulsar scintillation measurements
https://resolver.caltech.edu/CaltechAUTHORS:20170426-091338114
Authors: {'items': [{'id': 'Yang-Huan', 'name': {'family': 'Yang', 'given': 'Huan'}}, {'id': 'Nishizawa-Atsushi', 'name': {'family': 'Nishizawa', 'given': 'Atsushi'}, 'orcid': '0000-0003-3562-0990'}, {'id': 'Pen-U-L', 'name': {'family': 'Pen', 'given': 'Ue-Li'}}]}
Year: 2017
DOI: 10.1103/PhysRevD.95.084049
We propose to use pulsar scintillation measurements to test predictions of alternative theories of gravity. Compared to single-path pulsar timing measurements, the scintillation measurements can achieve an accuracy of one part in a thousand within one wave period, which means picosecond scale resolution in time, due to the effect of multipath interference. Previous scintillation measurements of PSR B0834+06 have hours of data acquisition, making this approach sensitive to mHz gravitational waves. Therefore it has unique advantages in measuring the effect of gravity or other mechanisms on light propagation. We illustrate its application in constraining the scalar gravitational-wave background, in which case the sensitivities can be greatly improved with respect to previous limits. We expect much broader applications in testing gravity with existing and future pulsar scintillation observations.https://authors.library.caltech.edu/records/4x7ms-pe079Black Hole Spectroscopy with Coherent Mode Stacking
https://resolver.caltech.edu/CaltechAUTHORS:20170420-081420966
Authors: {'items': [{'id': 'Yang-Huan', 'name': {'family': 'Yang', 'given': 'Huan'}}, {'id': 'Yagi-Kent', 'name': {'family': 'Yagi', 'given': 'Kent'}}, {'id': 'Blackman-J', 'name': {'family': 'Blackman', 'given': 'Jonathan'}, 'orcid': '0000-0002-7113-0289'}, {'id': 'Lehner-L', 'name': {'family': 'Lehner', 'given': 'Luis'}}, {'id': 'Paschalidis-V', 'name': {'family': 'Paschalidis', 'given': 'Vasileios'}}, {'id': 'Pretorius-F', 'name': {'family': 'Pretorius', 'given': 'Frans'}}, {'id': 'Yunes-N', 'name': {'family': 'Yunes', 'given': 'Nicolás'}, 'orcid': '0000-0001-6147-1736'}]}
Year: 2017
DOI: 10.1103/PhysRevLett.118.161101
The measurement of multiple ringdown modes in gravitational waves from binary black hole mergers will allow for testing the fundamental properties of black holes in general relativity and to constrain modified theories of gravity. To enhance the ability of Advanced LIGO/Virgo to perform such tasks, we propose a coherent mode stacking method to search for a chosen target mode within a collection of multiple merger events. We first rescale each signal so that the target mode in each of them has the same frequency and then sum the waveforms constructively. A crucial element to realize this coherent superposition is to make use of a priori information extracted from the inspiral-merger phase of each event. To illustrate the method, we perform a study with simulated events targeting the
ℓ=m=3 ringdown mode of the remnant black holes. We show that this method can significantly boost the signal-to-noise ratio of the collective target mode compared to that of the single loudest event. Using current estimates of merger rates, we show that it is likely that advanced-era detectors can measure this collective ringdown mode with one year of coincident data gathered at design sensitivity.https://authors.library.caltech.edu/records/wev0q-aet35Exploring the sensitivity of gravitational wave detectors to neutron star physics
https://resolver.caltech.edu/CaltechAUTHORS:20190531-091629833
Authors: {'items': [{'id': 'Martynov-D', 'name': {'family': 'Martynov', 'given': 'Denis'}}, {'id': 'Miao-Haixing', 'name': {'family': 'Miao', 'given': 'Haixing'}, 'orcid': '0000-0003-2879-5821'}, {'id': 'Yang-Huan', 'name': {'family': 'Yang', 'given': 'Huan'}}, {'id': 'Hernandez-Vivanco-F', 'name': {'family': 'Hernandez Vivanco', 'given': 'Francisco'}, 'orcid': '0000-0002-1942-7608'}, {'id': 'Thrane-E', 'name': {'family': 'Thrane', 'given': 'Eric'}, 'orcid': '0000-0002-4418-3895'}, {'id': 'Smith-R-J-E', 'name': {'family': 'Smith', 'given': 'Rory'}}, {'id': 'Lasky-P-D', 'name': {'family': 'Lasky', 'given': 'Paul'}, 'orcid': '0000-0003-3763-1386'}, {'id': 'East-W-E', 'name': {'family': 'East', 'given': 'William E.'}, 'orcid': '0000-0002-9017-6215'}, {'id': 'Adhikari-R-X', 'name': {'family': 'Adhikari', 'given': 'Rana'}, 'orcid': '0000-0002-5731-5076'}, {'id': 'Bauswein-A', 'name': {'family': 'Bauswein', 'given': 'Andreas'}, 'orcid': '0000-0001-6798-3572'}, {'id': 'Brooks-A-F', 'name': {'family': 'Brooks', 'given': 'Aidan'}, 'orcid': '0000-0003-4295-792X'}, {'id': 'Chen-Yanbei', 'name': {'family': 'Chen', 'given': 'Yanbei'}, 'orcid': '0000-0002-9730-9463'}, {'id': 'Corbitt-T', 'name': {'family': 'Corbitt', 'given': 'Thomas'}, 'orcid': '0000-0002-5520-8541'}, {'id': 'Freise-A', 'name': {'family': 'Freise', 'given': 'Andreas'}, 'orcid': '0000-0001-6586-9901'}, {'id': 'Grote-H', 'name': {'family': 'Grote', 'given': 'Hartmut'}}, {'id': 'Levin-Yuri', 'name': {'family': 'Levin', 'given': 'Yuri'}}, {'id': 'Zhao-Chunnong', 'name': {'family': 'Zhao', 'given': 'Chunnong'}, 'orcid': '0000-0001-5825-2401'}, {'id': 'Vecchio-A', 'name': {'family': 'Vecchio', 'given': 'Alberto'}, 'orcid': '0000-0002-6254-1617'}]}
Year: 2019
DOI: 10.1103/physrevd.99.102004
The physics of neutron stars can be studied with gravitational waves emitted from coalescing binary systems. Tidal effects become significant during the last few orbits and can be visible in the gravitational wave spectrum above 500 Hz. After the merger, the neutron star remnant oscillates at frequencies above 1 kHz and can collapse into a black hole. Gravitational wave detectors with a sensitivity of ≃ 10^(−24) strain/√Hz at 2–4 kHz can observe these oscillations from a source which is approximately 100 Mpc away. The current observatories, such as LIGO and Virgo, are limited by shot noise at high frequencies and have a sensitivity of greater than or equal to 2 × 10^(−23) strain/√Hz at 3 kHz. In this paper, we propose an optical configuration of gravitational wave detectors, which can be set up in present facilities using the current interferometer topology. This scheme has the potential to reach 7 × 10^(−25) strain/√Hz at 2.5 kHz without compromising the detector sensitivity to black hole binaries. We argue that the proposed instruments have the potential to detect similar amount of postmerger neutron star oscillations as the next generation detectors, such as Cosmic Explorer and Einstein Telescope. We also optimize the arm length of the future detectors for neutron star physics and find that the optimal arm length is ≈20 km. These instruments have the potential to observe neutron star postmerger oscillations at a rate of approximately 30 events per year with a signal-to-noise ratio of 5 or more.https://authors.library.caltech.edu/records/tvajs-pyn40Potassium Difluorophosphate as an Electrolyte Additive for Potassium Ion Batteries
https://resolver.caltech.edu/CaltechAUTHORS:20200722-103823636
Authors: {'items': [{'id': 'Yang-Huan', 'name': {'family': 'Yang', 'given': 'Huan'}, 'orcid': '0000-0002-8757-5733'}, {'id': 'Chen-Chih-Yao', 'name': {'family': 'Chen', 'given': 'Chih-Yao'}, 'orcid': '0000-0002-8799-4647'}, {'id': 'Hwang-Jinkwang', 'name': {'family': 'Hwang', 'given': 'Jinkwang'}, 'orcid': '0000-0003-4800-3158'}, {'id': 'Kubota-Keigo', 'name': {'family': 'Kubota', 'given': 'Keigo'}, 'orcid': '0000-0002-0536-129X'}, {'id': 'Matsumoto-Kazuhiko', 'name': {'family': 'Matsumoto', 'given': 'Kazuhiko'}, 'orcid': '0000-0002-0770-9210'}, {'id': 'Hagiwara-Rika', 'name': {'family': 'Hagiwara', 'given': 'Rika'}, 'orcid': '0000-0002-7234-3980'}]}
Year: 2020
DOI: 10.1021/acsami.0c09562
The limited cyclability and inferior Coulombic efficiency of graphite negative electrodes have been major impediments to their practical utilization in potassium-ion batteries (PIBs). Herein, for the first time, potassium difluorophosphate (KDFP) electrolyte additive is demonstrated as a viable solution to these bottlenecks by facilitating the formation of a stable and K⁺-conducting solid–electrolyte interphase (SEI) on graphite. The addition of 0.2 wt % KDFP to the electrolyte results in significant improvements in the (de)potassiation kinetics, capacity retention (76.8% after 400 cycles with KDFP vs 27.4% after 100 cycles without KDFP), and average Coulombic efficiency (∼99.9% during 400 cycles) of the graphite electrode. Moreover, the KDFP-containing electrolyte also enables durable cycling of the K/K symmetric cell at higher efficiencies and lower interfacial resistance as opposed to the electrolyte without KDFP. X-ray diffraction and Raman spectroscopy analyses have confirmed the reversible formation of a phase-pure stage-1 potassium–graphite intercalation compound (KC₈) with the aid of KDFP. The enhanced electrochemical performance by the KDFP addition is discussed based on the analysis of the SEI layer on graphite and K metal electrodes by X-ray photoelectron spectroscopy.https://authors.library.caltech.edu/records/470h9-jcb78Clueless/CLUH regulates mitochondrial fission by promoting recruitment of Drp1 to mitochondria
https://resolver.caltech.edu/CaltechAUTHORS:20220328-640822600
Authors: {'items': [{'id': 'Yang-Huan', 'name': {'family': 'Yang', 'given': 'Huan'}, 'orcid': '0000-0001-6140-2650'}, {'id': 'Sibilla-Caroline', 'name': {'family': 'Sibilla', 'given': 'Caroline'}}, {'id': 'Liu-Raymond', 'name': {'family': 'Liu', 'given': 'Raymond'}}, {'id': 'Yun-Jina', 'name': {'family': 'Yun', 'given': 'Jina'}}, {'id': 'Hay-B-A', 'name': {'family': 'Hay', 'given': 'Bruce A.'}, 'orcid': '0000-0002-5486-0482'}, {'id': 'Blackstone-Craig', 'name': {'family': 'Blackstone', 'given': 'Craig'}, 'orcid': '0000-0003-1261-9655'}, {'id': 'Chan-D-C', 'name': {'family': 'Chan', 'given': 'David C.'}, 'orcid': '0000-0002-0191-2154'}, {'id': 'Harvey-Robert-J', 'name': {'family': 'Harvey', 'given': 'Robert J.'}, 'orcid': '0000-0001-5956-6664'}, {'id': 'Guo-Ming', 'name': {'family': 'Guo', 'given': 'Ming'}, 'orcid': '0000-0002-1889-4271'}]}
Year: 2022
DOI: 10.1038/s41467-022-29071-4
Mitochondrial fission is critically important for controlling mitochondrial morphology, function, quality and transport. Drp1 is the master regulator driving mitochondrial fission, but exactly how Drp1 is regulated remains unclear. Here, we identified Drosophila Clueless and its mammalian orthologue CLUH as key regulators of Drp1. As with loss of drp1, depletion of clueless or CLUH results in mitochondrial elongation, while as with drp1 overexpression, clueless or CLUH overexpression leads to mitochondrial fragmentation. Importantly, drp1 overexpression rescues adult lethality, tissue disintegration and mitochondrial defects of clueless null mutants in Drosophila. Mechanistically, Clueless and CLUH promote recruitment of Drp1 to mitochondria from the cytosol. This involves CLUH binding to mRNAs encoding Drp1 receptors MiD49 and Mff, and regulation of their translation. Our findings identify a crucial role of Clueless and CLUH in controlling mitochondrial fission through regulation of Drp1.https://authors.library.caltech.edu/records/zzzaa-14w05