A5008076907- Quantum Information and Cryptography
- Spectroscopy and Quantum Chemical Studies
- Mechanical and Optical Resonators
- Photonic and Optical Devices
- Quantum and electron transport phenomena
- Advanced Thermodynamics and Statistical Mechanics
- stochastic dynamics and bifurcation
- Laser-Matter Interactions and Applications
- Force Microscopy Techniques and Applications
- Spectroscopy Techniques in Biomedical and Chemical Research
- Quantum Mechanics and Applications
- Advanced Electron Microscopy Techniques and Applications
- Advanced Fluorescence Microscopy Techniques
- Advanced X-ray Imaging Techniques
- Neural Networks and Reservoir Computing
- Cold Atom Physics and Bose-Einstein Condensates
- Spectroscopy and Chemometric Analyses
- Quantum Computing Algorithms and Architecture
- Physics of Superconductivity and Magnetism
- Orbital Angular Momentum in Optics
- Quantum optics and atomic interactions
- Advanced Condensed Matter Physics
- Digital Holography and Microscopy
- Molecular Junctions and Nanostructures
- Random lasers and scattering media
University of California, Irvine
2018-2022
Wayne State University
2022
Institute of Photonic Sciences
2020-2021
East China Normal University
2021
Bar-Ilan University
2020
Texas A&M University
2020
Technion – Israel Institute of Technology
2013-2017
Conventional spectroscopy uses classical light to detect matter properties through the variation of its response with frequencies or time delays.Quantum opens up new avenues for by utilizing parameters quantum state as novel control knobs and photon statistics coupling matter.This Roadmap article focuses on using a powerful sensing spectroscopic tool reveal information about complex molecules that is not accessible light.It aims at bridging optics communities which normally have opposite...
Abstract Optical interferometry has been a long-standing setup for characterization of quantum states light. Both linear and the nonlinear interferences can provide information regarding light statistics underlying detail light-matter interactions. Here we demonstrate how interferometric detection spectroscopic signals may be used to improve measurement accuracy matter susceptibilities. Light-matter interactions change photon light, which are encoded in field correlation functions....
A twisted X-ray beam with orbital angular momentum is employed in a theoretical study to probe molecular chirality. nonlocal response description of the matter-field coupling adopted account for field short wavelength and structured spatial profile. We use minimal-coupling Hamiltonian, which implicitly takes into multipole contributions all orders. The combined interactions spin give rise circular-helical dichroism signals, are stronger than ordinary circular may serve as useful tool...
Entangled photon pairs have been used for molecular spectroscopy in the form of entangled two-photon absorption and quantum interferometry precise measurements light source properties time delays. We present an experiment that combines by utilizing correlations photons a Hong–Ou–Mandel (HOM) interferometer to study properties. find HOM signal is sensitive presence resonant organic sample placed one arm interferometer, resulting contains information pertaining light–matter interaction. can...
Significance A quantum diffraction imaging technique is proposed, whereby one photon of an entangled pair diffracted off a sample and detected in coincidence with its twin. Scanning the that did not interact matter, we show phase information imprinted state field detectable. We discuss several experimental applications: ( i ) Obtaining real-space images avoids “phase problem.” ii The image scales as <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">...
We survey the inclusion of interferometric elements in nonlinear spectroscopy performed with quantum light. Controlled interference electromagnetic fields coupled to matter can induce constructive or destructive contributions microscopic coupling sequences (histories) matter. Since do not commute, light signals are sensitive order light–matter sequences. Matter correlation functions thus imprinted by different field factors, which depend on that order. identify associated information...
We develop closed expressions for a time-resolved photon counting signal induced by an entangled pair in interferometric spectroscopy setup. Superoperator Liouville-space are derived that can account relaxation and dephasing coupling to bath. Interferometric setups mix matter light variables non-trivially, which complicates their interpretation. provide intuitive modular framework this setup simplifies its description. Based on the separation between detection stage light-matter interaction...
Stochastic pumps are models of artificial molecular machines which driven by periodic time variation parameters, such as site and barrier energies. The no-pumping theorem states that no directed motion is generated only or energies [S. Rahav, J. Horowitz, C. Jarzynski, Phys. Rev. Lett. 101, 140602 (2008)]. We study stochastic several interacting particles demonstrate the net current satisfies an additional theorem.
Significance Here we establish femtosecond covariance spectroscopy as a technique that uses ultrashort stochastic light pulses to measure nonlinear material responses. By using with spectrally uncorrelated fluctuations can leverage on the noise and consider each repetition of experiment measurement under different conditions. In this limit demonstrate processes in sample be retrieved by measuring spectral correlations pulses. We validate approach studying stimulated Raman scattering...
Correlated photons inspire abundance of metrology-related platforms, which benefit from quantum (anti-) correlations and outperform their classical counterparts. While these mainly focus on entanglement, the role photon exchange phase degree distinguishability has not been widely used in applications. Using an interferometric setup, we theoretically show that, when a two-photon wave function is coupled to matter, it encoded with “which pathway?” information even at low-degree entanglement....
Abstract Entanglement engineering plays a central role in quantum-enhanced technologies, with potential physical platforms that outperform their classical counterparts. However, free electrons remain largely unexplored despite great capacity to encode and manipulate quantum information, due part the lack of suitable theoretical framework. Here we link concepts from information available free-electron sources. Specifically, consider interactions among propagating near surface...
We study theoretically incoherent time-resolved X-ray diffraction of fluctuating sources such as free electron lasers, well coherent with controllably added randomness. find that the temporal resolution is strongly eroded by noise. By considering frequency signal, we statistical properties noise carry important information allowing us to restore resolution. propose a multidimensional stochastic resonance treatment shape optical window and extract this from signals. Using frequency-dependent...
Homodyne X-ray diffraction signals produced by classical light and detectors are given the modulus square of charge density in momentum space |σ(q)|2, missing its phase, which is required order to invert signal real space. We show that quantum detection radiation field yields a linear pattern reveals σ(q) itself, including phase. further repeated measurements with variable delays constitute novel multidimensional measure spontaneous charge-density fluctuations. Classical diffraction,...
We construct an effective Hamiltonian of interacting bosons, based on scattered radiation off vibrational modes designed molecular architectures. Making use the infinite yet countable set spatial representing scattering light, we obtain a variable photon-photon interaction in this basis. The hermiticity is controlled by geometric factor overlaps modes. Using mapping, relate intensity measurements light to correlation functions bosons evolving according Hamiltonian, rendering local as well...
Covariance spectroscopy signals based on the transmission of broadband stochastic probe light undergoing a nonlinear optical process with matter are studied. The resulting signal depends intensity correlation functions pulse. Application is made to transient absorption and stimulated Raman signals, where an ultraviolet pump delayed stochastically modulated infrared or used for monitoring vibrational excitations. We show that properties can be exploited circumvent limitations joint temporal...
We consider a model of stochastic pump in which many particles jump between sites along ring. The interact with each other via zero-range interactions. argue that for slow driving the dynamics can be approximated by nonlinear diffusion equation. This equation is then used to derive current decomposition formula, expressing as sum two contributions. first from momentary steady state while second arises due variation density time, and identified pumped current. found satisfy no-pumping theorem...
SignificanceIn a theoretical study, we present an ultrafast technique for probing time-dependent molecular charge densities. An optical pump first brings the molecule into electronic nonstationary state. This is followed by coherent inelastic scattering of broadband single-electron probe pulse with variable delay T, which detected spectrally. The applied to reveal phase-sensitive background-free electron beating in conical intersection passage uracil and reveals otherwise elusive strongly...
We present a scalable, robust approach to creating quantum programs of arbitrary size and complexity. The is based on the true abstraction problem. program expressed in terms high-level model together with constraints objectives final program. Advanced synthesis algorithms transform into low-level that meets user's specification directed at stipulated hardware. This separation description from implementation essential for scale. technology adapts electronic design automation methods...
Absolute resistivity measurements as a function of temperature from optimally doped YBa_2Cu_3O_(7), La_(2-x)Sr_xCuO_4, Bi_2Sr_2CaCu_2O_(8-x), and (Ca_0.1La_0.9)(Ba_1.65La_0.35)Cu_3O_y thin films are reported. Special attention is given to the measurement geometrical factors slope between Tc T^{*}. The results compared with strong coupling theory for derivative near T_c, which based on hard core bosons (HCB), several weak theories, BCS based. Surprisingly, our agree both paradigms....
The Jarzynski equality is one of the most influential results in field nonequilibrium statistical mechanics. This celebrated allow calculation equilibrium free-energy differences from work distributions processes. In practice, such calculations often suffer poor convergence due to need sample rare events. Here we examine if inclusion measurement and feedback can improve calculations. A modified version which realizations with a given outcome are kept, while others discarded, used. We find...
I will review the possibility to retrieve nonlinear responses in complex materials by measuring noise correlations of classical and quantum nature.