A5100352675- Physics of Superconductivity and Magnetism
- Spectroscopy and Quantum Chemical Studies
- Quantum and electron transport phenomena
- Molecular Junctions and Nanostructures
- Advanced Thermodynamics and Statistical Mechanics
- Advanced Condensed Matter Physics
- Advanced Chemical Physics Studies
- Rare-earth and actinide compounds
- Quantum many-body systems
- Privacy-Preserving Technologies in Data
- Cancer Genomics and Diagnostics
- Photoreceptor and optogenetics research
- Magnetic and transport properties of perovskites and related materials
- Quantum Mechanics and Applications
- Quantum Information and Cryptography
- Theoretical and Computational Physics
- Topological Materials and Phenomena
- Cold Atom Physics and Bose-Einstein Condensates
- Laser-Matter Interactions and Applications
- Quantum, superfluid, helium dynamics
- Quantum Mechanics and Non-Hermitian Physics
- Cryptography and Data Security
- Magnetic properties of thin films
- Quantum optics and atomic interactions
- Ethics in Clinical Research
California State University, Northridge
1998-2025
California State University System
2025
University of California, Irvine
2021-2023
Ningde Normal University
2021
University of California, San Diego
2007-2020
Tsinghua University
2019
Hefei University
2017
UC San Diego Health System
2016
High Magnetic Field Laboratory
2014
Chinese Academy of Sciences
2014
The genome of the eukaryotic protist Giardia lamblia, an important human intestinal parasite, is compact in structure and content, contains few introns or mitochondrial relics, has simplified machinery for DNA replication, transcription, RNA processing, most metabolic pathways. Protein kinases comprise single largest protein class reflect Giardia's requirement a complex signal transduction network coordinating differentiation. Lateral gene transfer from bacterial archaeal donors shaped...
The square-lattice Hubbard and closely related $t\text{\ensuremath{-}}J$ models are considered as basic paradigms for understanding strong correlation effects unconventional superconductivity (SC). Recent large-scale density matrix renormalization group simulations on the extended model have identified $d$-wave SC electron-doped side (with next-nearest-neighbor hopping ${t}_{2}>0$) but a dominant charge wave (CDW) order hole-doped (${t}_{2}<0$), which is inconsistent with of cuprate...
A recent experiment has observed a series of quantum-spin-Hall effects in moiré MoTe2. Among them, the vanishing Hall signal at filling factor ν = 3 implies possible realization time-reversal pair even-denominator fractional Chern insulators. Inspired by this discovery, we numerically investigate whether robust incompressible quantum-Hall liquid can be stabilized half-filled band twisted MoTe2 bilayers. We use continuum model with parameters relevant to bilayers and obtain three consecutive...
With the recent advances in surface fabrication technologies, condensation heat transfer has seen a renaissance. Hydrophobic and superhydrophobic surfaces have all been employed as means to enhance condensate shedding, enabling micrometric droplet departure length scales. One of main bottlenecks for achieving higher efficiencies is difficulty shedding sub-10 μm droplets due increasing role played by adhesion viscous limitations at nanometric To enable ultraefficient we demonstrate...
We introduce PRINCESS, a privacy-preserving international collaboration framework for analyzing rare disease genetic data that are distributed across different continents. PRINCESS leverages Software Guard Extensions (SGX) and hardware trustworthy computation. Unlike traditional model, where individual-level patient DNA physically centralized at single site, performs secure computation over encrypted data, fulfilling institutional policies regulations protected health information.To...
In this theoretical study, we show how photoelectron signals generated by time-energy entangled photon pairs can monitor ultrafast excited state dynamics of molecules with high joint spectral and temporal resolutions, not limited the Fourier uncertainty classical light. This technique scales linearly, rather than quadratically, pump intensity, allowing study fragile biological samples low fluxes. Since resolution is achieved electron detection a variable phase delay, does require scanning...
The Hubbard and closely related t-J models are exciting platforms for unconventional superconductivity (SC). Through state-of-the-art density matrix renormalization group calculations using the grand canonical ensemble, we address open issues regarding ground-state phase diagram of extended model on a square lattice in parameter regime relevant to cuprate superconductors. On large 8-leg cylinders, demonstrate that pure with only nearest-neighbor hoppings superexchange interactions, wide...
Advances in DNA sequencing technologies have prompted a wide range of genomic applications to improve healthcare and facilitate biomedical research. However, privacy security concerns emerged as challenge for utilizing cloud computing handle sensitive data. We present one the first implementations Software Guard Extension (SGX) based securely outsourced genetic testing framework, which leverages multiple cryptographic protocols minimal perfect hash scheme enable efficient secure data storage...
Abstract We show that an open fermionic system coupled to a continuous environment with unitary system-environment evolution can be exactly mapped onto auxiliary consisting of the physical fermion and set discrete modes subject non-unitary Lindblad-type system-modes in such way reduced dynamics two cases are same. Conditions for equivalence systems identified proof is presented. Our study extends recent work on Bose (Tamascelli et al 2018 Phys. Rev. Lett . 120 030402) case quantum Fermi...
We present general first-principles derivation of the expression for current-induced forces. The is applicable in nonequilibrium molecular systems with arbitrary intramolecular interactions and any electron-nuclei coupling. It provides a controlled consistent way to account quantum effects nuclear motion around classical trajectory, accounts electronic non-Markov character friction tensor, suggests method treatment beyond strictly adiabatic approximation. show connection previous studies...
We introduce diagrammatic technique for Hubbard nonequilibrium Green functions (NEGF). The formulation is an extension of equilibrium considerations strongly correlated lattice models to description current carrying molecular junctions. Within the intra-system interactions are taken into account exactly, while coupling contacts used as a small parameter in perturbative expansion. demonstrate viability approach with numerical simulations generic junction model quantum dot coupled two electron...
In this theoretical study, we show how ultrafast electron–nuclear dynamics in a molecule can be monitored by two-photon absorption of time–energy entangled photon pairs generated spontaneous parametric down-conversion with narrow-band pump. The is tracked controllable signal-idler delay. Time correlation the photons enables an measurement even monochromatic frequency anticorrelation pair allows projection intermediate excited-state wavepacket onto energy-selected vibrational level on...
Recent experimental progress has established the twisted bilayer transition metal dichalcogenide (TMD) as a highly tunable platform for studying many-body physics. Particularly, homobilayer TMDs under displacement field are believed to be described by generalized triangular-lattice Hubbard model with spin-dependent hopping phase $\ensuremath{\theta}$. To explore effects of $\ensuremath{\theta}$ on system, we perform density matrix renormalization group calculations relevant triangular...
Large -area well-ordered monolayer of rubrene has been fabricated on Au(111) surface by gradually annealing a multilayer in vacuum. Scanning tunneling microscopy clearly demonstrates that the experiences disorder-order transition with increase temperature and molecules form dimer rows opposite directions for two neighbored rows. The π-π π-H interactions between induced conformation account main driving forces to this kind ordered layer.
Progress in experimental techniques at nanoscale made measurements of noise molecular junctions possible. These data are important source information not accessible through average flux measurements. Emergence optoelectronics, recently shown possibility strong light-matter couplings, and developments the field quantum thermodynamics making counting statistics even higher importance. Theoretical methods for evaluation first principles simulations can be roughly divided into approaches...
Patient health data are often found spread across various sources. However, precision medicine and personalized care require access to the complete medical records. The first step toward this is enable linkage of records different sites. Existing record solutions assume that centralized with no privacy or security concerns restricting sharing. untrue. Therefore, we have designed implemented a portable method for privacy-preserving based on garbled circuits accurately securely match We also...
We introduce an auxiliary quantum master equation dual fermion method and argue that it presents a convenient way to describe steady states of correlated impurity models. The scheme yields expansion around reference is much closer the true nonequilibrium state than in original formulation. In steady-state situations, numerically inexpensive avoids time propagation. Anderson model used test approach against exact benchmarks.
Time-energy entangled photons produced by spontaneous parametric down-conversion (SPDC) are employed to calculate vibrational hyper-Raman (HR) signals of the conjugated organic chromophore Wu112. Compared with classical light, time-energy entanglement can provide selectivity Liouville-space pathways and thus suppress strong broad electronic-Raman background arising from one-photon resonances intermediate states. The entangled-photon HR signal scales linearly SPDC pump field intensity rather...
We consider effects of strong light-matter interaction on electronic friction in molecular junctions within generic model single molecule nano cavity junction. Results the Hubbard NEGF simulations are compared with mean-field and generalized Head-Gordon Tully approaches. Mean-field is shown to fail qualitatively at intra-system interactions, while accuracy results restricted situations well separated intra-molecular excitations, when bath induced coherences negligible. Numerical show bias...
The coherent ring current of Mg-phthalocyanine are created by a broad band UV-visible pump pulse and migrate into different regions within the molecule. This dynamics is probed time-resolved X-ray circular dichroism.
Recent developments in nanoscale experimental techniques made it possible to utilize single molecule junctions as devices for electronics and energy transfer with quantum coherence playing an important role their thermoelectric characteristics. Theoretical studies on the efficiency of usually employ rate (Pauli) equations, which do not account coherence. Therefore, question whether could improve a molecular device cannot be fully addressed within such considerations. Here, we nonequilibrium...
Energy levels, Auger branching ratios, and radiative rates of the core-excited states B-like carbon are calculated by saddle-point variation complex-rotation methods. Relativistic mass polarization corrections included using first-order perturbation theory. Calculated channel energies ratios used to identify high-resolution spectrum in 300-keV C+ → CH4 collision experiment. It is found that decay these five-electron gives significant contributions range 238–280 eV.
We theoretically investigate the two-photon absorption signals of a three-band (g, e, f) system diagonally coupled to an over-damped Brownian oscillator bath, which induces random Gaussian modulations energy levels with arbitrary degree correlation. For fast modulation, extra 2ωeg and 2ωfe peaks may obscure g-f transitions in classical (CTPA) spectra for nearly resonant e states. These arise from one-photon g-e or e-f transitions. In slow modulation limit, these vanish because short tails...