A5022551568- Quantum Information and Cryptography
- Quantum Computing Algorithms and Architecture
- Quantum many-body systems
- Quantum and electron transport phenomena
- Machine Learning in Materials Science
- X-ray Diffraction in Crystallography
- Advanced Thermoelectric Materials and Devices
- Surface and Thin Film Phenomena
- Neural Networks and Reservoir Computing
- Physics of Superconductivity and Magnetism
- Electronic and Structural Properties of Oxides
- Clay minerals and soil interactions
- Advanced Materials Characterization Techniques
- Chalcogenide Semiconductor Thin Films
- Magnetism in coordination complexes
- Topological Materials and Phenomena
- Atomic and Subatomic Physics Research
- Quantum Mechanics and Applications
- Spectroscopy and Quantum Chemical Studies
- Quantum optics and atomic interactions
- Advanced NMR Techniques and Applications
- Heusler alloys: electronic and magnetic properties
- Gas Sensing Nanomaterials and Sensors
- 2D Materials and Applications
- Molecular Junctions and Nanostructures
University of Southern California
2020-2025
University of Padua
2023-2025
Central Michigan University
2025
Osservatorio Astronomico di Padova
2024
Istituto Nazionale di Fisica Nucleare, Sezione di Padova
2024
Southern California University for Professional Studies
2020
Los Angeles City College
2020
University of North Texas
2017-2019
Duke University
2018-2019
University of Modena and Reggio Emilia
2012-2017
A new sphalerite derivative compound, Cu 7 VSnS 8 , for thermoelectric applications was discovered using the pseudo-binary approach within “Cu 3 SnS 4 ”–“Cu VS ” system.
We investigate the dynamics of continuous-time two-particle quantum walks on a one-dimensional noisy lattice. Depending initial condition, we show how interplay between particle indistinguishability and interaction determines distinct propagation regimes. A realistic model for environment is considered by introducing non-Gaussian noise as time-dependent fluctuations tunneling amplitudes adjacent sites. observe that combined effect fast (weak coupling with environment) provides faster...
Abstract Regardless of its success, the constant relaxation time approximation has limited validity. Temperature and energy dependent effects are important to match experimental trends even in simple situations. We present implementation models calculation Boltzmann transport 2.0 apply those model band-structures. In addition, using a self-consistent fitting parameters conductivity data, we provide flexible tool extract scattering rates with high accuracy. illustrate approximations then...
We put forward the idea of lattice quantum magnetometry, i.e. sensing magnetic fields by a charged (spinless) particle placed on finite two-dimensional lattice. In particular, we focus detection locally static transverse field, either homogeneous or inhomogeneous, performing ground state measurements. The system turns out to be interest as magnetometer, since it provides non-negligible Fisher information (QFI) in large range configurations. Moreover, QFI shows some relevant peaks, determined...
Antiferromagnetic spin rings represent prototypical realizations of highly correlated, low-dimensional systems. Here we theoretically show how the introduction magnetic defects by controlled chemical substitutions results in a strong spatial modulation spin-pair entanglement within each ring. Entanglement between local degrees freedom (individual spins) and collective ones (total ring are shown to coexist exchange-coupled dimers, as can be deduced from general symmetry arguments. We verify...
We derive energy minima for biseparable states in three- and four-spin systems, with Heisenberg Hamiltonian s <= 5/2. These provide lower bounds tripartite quadripartite entanglement chains rings larger spin number N. demonstrate that the ground state of an $N$-spin chain is $N$-partite entangled, compute gap respect to N 8.
We address parameter estimation in two-level systems exhibiting level anticrossing and prove that universally optimal strategies for may be designed. In fact, we find a parameter-independent measurement scheme, leading to the ultimate quantum precision, independently of value interest. Optimal achieved also at high temperature, depending on structure Hamiltonian. Finally, discuss based dynamical strategies, number specific applications.
Abstract Serpentine clay minerals are found in many geological settings. The rich diversity, both chemical composition and crystal structure, alters the elastic behavior of rocks significantly, thus modifying seismic sonic responses to shaley sequences. Computation properties is a useful tool characterize this diversity. In paper we use first principles methods compare mechanical lizardite Mg 3 (Si 2 O 5 )(OH) 4 , polymorph serpentine family, with new compounds derived by substituting ions...
We investigate the low-temperature magnetic and entanglement properties of a series molecular Cr${}_{2n}$Cu${}_{2}$ heterometallic spin rings (with $n=4,5,6$). These are cyclic systems, consisting two Cu${}^{2+}$ ($s=1/2$) ions, coupled by antiferromagnetic segments $n$ Cr${}^{3+}$ ($s=3/2$) ions. Thermodynamic measurements (magnetization, susceptibility, specific heat) allow us to determine total ground state estimate spin-Hamiltonian parameters related anisotropy. X-ray spectroscopies (XAS...
Synthetic copper sulfides have emerged as promising nontoxic and low-cost materials for thermoelectric power generation in low-grade waste heat recovery systems. Similarly to tetrahedrite colusite, mawsonite Cu6Fe2SnS8 exhibits a modified corner sharing Cu–S tetrahedral network which usually leads p-type character low thermal conductivity. In order explore the applicative potential of mawsonite, we studied band structure, phonon dispersions, electronic transport coefficients, well effect...
Quantum states of systems made many identical particles, e.g. those described by Fermi-Hubbard and Bose-Hubbard models, are conveniently depicted in the Fock space. However, order to evaluate some specific observables or study system dynamics, it is often more effective employ Hilbert space description. Moving effectively from one description other thus a desirable feature, especially when numerical approach needed. Here we recall construction for indistinguishable then present set recipes...
We investigate multipartite entanglement in rings of arbitrary spins with antiferromagnetic interactions between nearest neighbors. In particular, we show that the nondegenerate ground state formed by an even number $(N)$ is $N$-partite entangled, and exchange energy can thus be used as a multipartite-entanglement witness. develop general approach to compute minima corresponding biseparable states, provide numerical results for representative set systems. Despite its global character, also...
Quantum annealers have grown in complexity to the point that quantum computations involving a few thousand qubits are now possible. In this paper, with intentions show feasibility of annealing tackle problems physical relevance, we used simple model, compatible capability current annealers, study relative stability graphene vacancy defects. By mapping crucial interactions dominate carbon-vacancy interchange onto quadratic unconstrained binary optimization problem, our approach exploits...
We address the dynamics of two indistinguishable interacting particles moving on a dynamical percolation graph, i.e., graph where edges are independent random telegraph processes whose values jump between 0 and 1, thus mimicking percolation. The interplay particle interaction strength, initial state rate determine different regimes for walkers. show that, whenever walkers initially localised within range, fast noise enhances spread compared to noiseless case.
Electronic transport coefficients such as the electrical conductivity, termo-power, and charge carrier concentration are routinely measured in a variety of application areas electronics or thermoelectric power-generation cooling. Using fitting procedures, those measurements used to infer microscopic features samples. The code facilitates estimation electronic structure parameters effective masses band energies improving current approach by increasing complexity representation. software is...
Compilation optimizes quantum algorithms performances on real-world computers. To date, it is performed via classical optimization strategies. We introduce a class of to perform compilation computers, paving the way for advantage in compilation. demonstrate effectiveness this approach Quantum and Simulated Annealing-based compilation: we successfully compile Trotterized Hamiltonian simulation with up 64 qubits time-steps Fourier Transform 40 771 time steps. show that, translationally...
We numerically analyze the feasibility of a platform-neutral, general strategy to perform quantum simulations fermionic lattice field theories under open boundary conditions. The digital simulator requires solely one- and two-qubit gates is scalable since integrating each Hamiltonian term finite (non-scaling) cost. exact local fermion encoding we adopt relies on auxiliary <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow class="MJX-TeXAtom-ORD"><mml:mi...
Classical public-key cryptography standards rely on the Rivest-Shamir-Adleman (RSA) encryption protocol. The security of this protocol is based exponential computational complexity most efficient classical algorithms for factoring large semiprime numbers into their two prime components. Here, we attack RSA factorization building Schnorr's mathematical framework where translates a combinatorial optimization problem. We solve task via tensor network methods, quantum-inspired numerical...