Novel functional materials and devices, atomic layer epitaxi, oxide thin films, superconducting devices, d-wave and fractional flux quatum effects and devices

Quantum field theory;  Financial modeling based on techniques of quantum theory

The use of ultra-cold atoms for neutral atom quantum information applications.  We investigate the use of micro-fabricated magnetic traps (atom chips) and optical lattices as a means to trap and manipulate large arrays of atoms (qubits).  To provide the necessary interaction between individual atoms we are investigating the use of micro-cavities.

Integrated micro-optics and photonics; fluorescence imaging and spectroscopy; proton beam writing technology.

Ion-solid interactions, Silicon Photonics, Porous Silicon, Charge transport in semiconductors, Ion Optics

Multi-particle Production and Multiplicity (HEP Physics Phenomenology)

Solid-state hydrogen storage materials; synthesis of ternary and higher metal amides and imides; application of metal0N-H compounds in hetero-catalysis, secondary batteries and organic or bio-synthesis.

Molecular self-assembly on surfaces and surface nanotemplates, single molecule behaviors,  molecular-level interface engineered organic thin films,  molecule-substrate interface properties associated with molecular electronics and organic electronics, graphene, scanning tunneling microscopy, synchrotron radiation.

Device physics and chemistry of solution-processable graphenes and organic semiconductors.

Functional Materials - Lithium Ion Batteries

Use of laser-cooled atoms and Bose-Einstein condensates in ultra-high precision measurements; Study the feasibility of using atom interferometers to detect effects of quantum gravity.

Most aspects of information processing in quantum-mechanical systems, with a focus on quantum cryptography and quantum computation.

First-principles electronic structure calculations on materials for advanced technologies (magnetic semiconductor, oxides, nanomaterials, etc) and prediction of new functional materials.

Conjugated polymers; time-resolved optical spectroscopy; molecular conductors and magnets.

Neutrinos and neutrino oscillations, cosmology and cosmic strings.

Coherent control of quantum dynamics and the associated applications in quantum information science as well as atomic and molecular physics;  fundamental aspects of quantum and classical nonlinear dynamics in connection with cold-atom experiments; nanoscale quantum devices; theory of quantum open systems.

Physics and technology of organic semiconductor devices and interfaces

Experimental quantum optics and cold atom physics, Miniaturization technologies for atomic physics and optics, Cold atoms as a test system for quantum information theory

Quantum dots, nanowires, and nanotubes for nanophotonics and ultrafast nonlinear optics.

Analysis of multipartite entanglement of many-body systems and the role it plays in thermodynamics and critical phenomena in bulk matter. I am interested in a possible extraction and usage of this entanglement for quantum information processing

Spin dynamics and acoustic dynamics of nano-scale structures. Investigation of magnetic and mechanical properties of magnetic and non-magnetic nanostructures using inelastic (Brillouin) laser light scattering. Phase transitions in ferroelectric and ferroelastic materials.

Experimental Quantum Information and Communication, Single Photon Technologies, Atom-Light interaction.

Atmospheric correction of hyperspectral data; Hyperspectral data analysis and applications in land cover classification; Derivation of optical properties and water quality parameters of sea and inland waters from remote sensing reflectance data.

Quantum degenerate gases, cold Rydberg atoms, many-body physics with atoms in optical lattices, quantum information process with neutral atoms

Dynamics of atmosphere and ocean, image restoration, synthetic aperture radar imaging, and electromagnetic materials.

Theoretical calculations of acoustic phonons and dipole-exchanged spin waves in nanostructures.

Single-molecule study of protein folding/unfolding, protein-protein interactions, and intra cellular signaling processes. Electronic properties and transportation in biological systems at the molecular level. Advanced single-molecule detection and manipulation techniques will be extensively used.

Biomineralization, bio-soft functional materials engineering, silk and ultra-preferment materials, protein aggregation/assembly and crystallization, freezing and antifreeze, bio-membrane, colloidal assembly and crystallization,  drug delivery, crystallization kinetics, the morphology of crystals, nanotemplating , tissue engineering.

Experimental studies in Spintronics, Magnetism, Multiferroics, Oxides and Carbon based materials

Astrophysics and Cosmology. Current Research Topics:Observational Tests of Cosmological Models; Evidence from Type Ia Supernovae for an Accelerating Universe and Dark Energy. Inhomogeneous Cosmology as an Explanation for the Apparent Cosmic Acceleration.

Yang - Mills gauge field theories; Chern-Simons theories.  Quantum algebra  and Yang-Baxter equations. Particle production and multiplicity distributions. Neutrino physics. Deep inelastic scattering in high energy physics. Quantum information science.

Development and applications of ion beam based techniques: high resolution (magnetic spectrometer) Rutherford backscattering and elastic recoil detection analysis, nuclear microscopy, ion beam induced current, proton beam writing.

Mesoscopic physics, charge and spin transport in graphene nanostructures, Quantum Hall effect, magnetic nanopillar junctions, current induced magnetization dynamics.

Quantum Theory and its deformations; Cosmology.

Fabrication and spectroscopy study on novel complex systems and nanostrucutured strongly correlated electron systems in bulk as well as ultra thin film form, such high temperature superconductors, magnetic materials, organic semiconductors, and molecular electronics materials. Develop and use various synchrotron-based spectroscopy methods such as resonant soft x-ray (magnetic) scattering, vacuum ultraviolet-free electron laser Raman spectroscopy, and ultraviolet-vacuum ultratraviolet optical ellipsometry.

Quantum information, in particular cryptography and communication. Quantum non-locality and foundations of physics.

Geometrical Methods in Physics; Quantum Algebras; Quantum information; and Quantum Gravity

Develop a laser pruning method to create unique 2D and 3D structure made of carbon nanotubes. Study of Field Emission properties of Unique Carbon Nanotube Arrays Large Area Patterning of Carbon Nanotube Arrays. MicroDevices made of Carbon Nanotubes.   Synthesis of a wide variety of nanoscale metallic oxide materials. Self-assembly and assisted assembly of nanowires and nanowalls.   Invented Mirror-Image method for tracking 3D motion of suspended sub-micron particles; Measurements of interaction potential between charged sub-micron sphere and confining plates; Developed single and multiple trap optical tweezers using focused laser beams

Microwave applications of semiconductors and dielectrics; Digital musical sound analysis and synthesis; and Psychoacoustics of time-delayed multiple sound sources.

Study of nonlinear photonic crystals and terahertz spectroscopy of nanostructured materials.

General relativity, quantum field theory and string theory; Classical and quantum properties of black holes, particularly within the framework of string or M-theory; Quantum field theory in curved space-time, quantum inequalities and negative energy densities.

Surface and Interface Research of Semiconducting Materials: Growth dynamics, kinetics, energetics and scaling phenomena in low dimensional metallic, organic and semiconducting structures on surfaces of III-V and IV-IV semiconductors.

Biomolecular assemblies, complexity and emergence; Biomolecular structure, dynamics, and flow; Biotechnical and biomedical applications, and Biopolymer physics, soft condensed matter and complex fluids.

3D nano-fabrication and replication of: templates for nanowire growth, nanofluidic devices and molecular electronic devices. Development of proton beam focusing for proton beam writing technology.

Many body entanglement; Geometrical phases and quantum computation; Generalised entropies in information theory and physics; and Cluster state quantum computation

Nanoscience and Nanotechnology

Nonlinear optical imaging; Coherent anti-Stokes Raman scattering (CARS) microscopy and its application to biomedical systems; and multi-photon luminescence from nanostructures.

Efficient Monte Carlo simulation methods and their applications in statistical physics, such as cluster algorithms and generalized ensemble methods.   More recent focus is on quantum thermal transport problems in nanostructures with nonequilibrium Green’s function approach and molecular dynamics with quantum heat bath. 

Non-Hermitian Quantum Mechanics, Quantum Field Theory, Worldline Instantons and Pair Production, False Vacuum Decay in Cosmology, Color Superconducting Quark Matter, Staggered Fermions in Lattice QCD, Mathematical Physics.

Growth and STM characterization of self-assembled and self-organized inorganic, organic molecular, and  hybrid nanostructures; integration of magnetic, optoelectronic and molecular nanostructures on Si-based substrates

Motor protein biophysics, bioinspired artificial nanodevices, single-molecule mechanics & spectroscopy, thermodynamics of molecular machine systems, computational methods for molecular processes simulation (both classical and quantum-mechanical methods)

Development of proton beam technology (proton microscopy and proton beam writing) and applications in biomedicine.

Surface and Nanoscale Science:  STM and synchrotron studies of the molecule-metal interface; Surface nanostructure formation and atomic scale templates for nanodevices; Synchrotron radiation studies of  molecule-metal interface; Depth resolution studies in SIMS and ultrashallow junctions; Ion beam patterning of surfaces; Graphene, carbon nanotubes and related nanomaterials for nanodevice applications

Complex systems in both a physical as well as a biological context, Chaos, Network rewiring and Disease Networks. Fundamental aspects of modern physics.

Single-molecule study of DNA organization in cells: DNA-protein interactions and chromatin; theoretical polymer physics and DNA micromechanics; gene transcription, regulation, and gene replication; virus replication mechanism in host cells.

Multiparticle entanglement

Theoretical modeling and simulation of properties of materials at nanoscale: Molecular electronics/spintronics; Nanocatalysis; Strongly correlated few electron quantum dots.