A5076972962- Magnetism in coordination complexes
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Quantum and electron transport phenomena
- Advanced NMR Techniques and Applications
- Quantum Computing Algorithms and Architecture
- Quantum Information and Cryptography
- Lanthanide and Transition Metal Complexes
- Electron Spin Resonance Studies
- Organic and Molecular Conductors Research
- Molecular Junctions and Nanostructures
- Physics of Superconductivity and Magnetism
- Spectroscopy and Quantum Chemical Studies
- Magnetic properties of thin films
- Atomic and Subatomic Physics Research
- Inorganic Chemistry and Materials
- Rare-earth and actinide compounds
- Advanced Condensed Matter Physics
- Porphyrin and Phthalocyanine Chemistry
- Quantum Mechanics and Applications
- Advanced Chemical Physics Studies
- Quantum optics and atomic interactions
- Quantum-Dot Cellular Automata
- Molecular spectroscopy and chirality
- Quantum many-body systems
University of Parma
2016-2025
National Interuniversity Consortium of Materials Science and Technology
2012-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca
2022-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
2022
Terra
2016
Istituto Nanoscienze
2010-2014
National Interuniversity Consortium for the Physical Sciences of Matter
2010-2013
Istituto Nazionale di Fisica Nucleare, Sezione di Pavia
2009
University of Pavia
2009
Istituto Nazionale di Fisica Nucleare, Centro Nazionale Analisi Fotogrammi
2006-2007
This article reviews the physics of multipolar interactions and order in $f$-electron systems, using actinide dioxides as a paradigm. In past few years, these apparently simple cubic compounds have been studied intensively, many new phenomena discovered. Here experimental results are discussed together with current theoretical understanding interactions.
A magnetic Co-production: The complex [Co(μ-L)(μ-OAc)Y(NO3)2] (see structure O red, N blue, C gray), in which the CoII ion exhibits a D value of approximately +45 cm−1, as determined by and inelastic neutron scattering experiments, slow relaxation single-ion magnet behavior.
Abstract The physical implementation of quantum information processing relies on individual modules—qubits—and operations that modify such modules either individually or in groups—quantum gates. Two examples gates entangle pairs qubits are the controlled NOT-gate (CNOT) gate, which flips state one qubit depending another, and "Equation missing"gate brings a two-qubit product into superposition involving partially swapping states. Here we show through supramolecular chemistry single simple...
The role of chirality in determining the spin dynamics photoinduced electron transfer donor-acceptor molecules remains an open question. Although chirality-induced selectivity (CISS) has been demonstrated bound to substrates, experimental information about whether this process influences themselves is lacking. Here we used time-resolved paramagnetic resonance spectroscopy show that CISS strongly isolated covalent donor-chiral bridge-acceptor (D-Bχ-A) which selective photoexcitation D...
Molecular spins are promising building blocks of future quantum technologies thanks to the unparalleled flexibility provided by chemistry, which allows design complex structures targeted for specific applications. However, their weak interaction with external stimuli makes it difficult access state at single-molecule level, a fundamental tool use, example, in computing and sensing. Here, an innovative solution exploiting interplay between chirality magnetism using chirality-induced spin...
Abstract Molecular nanomagnets (MNMs), molecules containing interacting spins, have been a playground for quantum mechanics. They are characterized by many accessible low-energy levels that can be exploited to store and process information. This naturally opens the possibility of using them as qudits, thus enlarging tools logic with respect qubit-based architectures. These additional degrees freedom recently prompted proposal encoding qubits embedded error correction (QEC) in single...
The substitution of one metal ion in a Cr-based molecular ring with dominant antiferromagnetic couplings allows to engineer its level structure and ground-state degeneracy. Here we characterize Cr7Ni by means low-temperature specific-heat torque-magnetometry measurements, thus determining the microscopic parameters corresponding spin Hamiltonian. energy spectrum suppression leakage-inducing S-mixing render molecule suitable candidate for qubit implementation, as further substantiated our...
The past few years have witnessed the concrete and fast spreading of quantum technologies for practical computation simulation. In particular, computing platforms based on either trapped ions or superconducting qubits become available simulations benchmarking, with up to tens that can be reliably initialized, controlled, measured. present review aims at giving a comprehensive outlook state art capabilities offered from these near-term noisy devices as universal simulators, i.e. programmable...
The recent discovery of single-ion magnets with magnetic hysteresis above liquid-nitrogen temperatures placed these compounds among the best candidates to realize high-density storage devices. Starting from a prototypical dysprosocenium molecule, showing up 60 K, we derive here general recipe design high-blocking-temperature rare-earth magnets. complex relaxation is unraveled by combining magnetization and nuclear resonance measurements inelastic neutron scattering experiments ab initio...
A molecular architecture where two vanadyl-based qubits are linked together is herein described and investigated as a platform for quantum simulation.
Magnetic exchange interactions within the asymmetric dimetallic compounds [hqH2][Ln2(hq)4(NO3)3]·MeOH, (Ln = Er(III) and Yb(III), hqH 8-hydroxyquinoline) have been directly probed with EPR spectroscopy accurately modeled by spin Hamiltonian techniques. Exploitation of site selectivity via doping experiments in Y(III) Lu(III) matrices yields simple spectra corresponding to isolated Kramers doublets, allowing determination local magnetic properties individual sites compounds. CASSCF-SO...
We show that molecular nanomagnets have a potential advantage in the crucial rush toward quantum computers. Indeed, sizable number of accessible low-energy states these systems can be exploited to define qubits with embedded error correction. derive scheme achieve this objective and corresponding sequence microwave/radiofrequency pulses needed for correction procedure. The effectiveness our approach is shown already minimal S = 3/2 unit an existing molecule, scaling larger spin...
Abstract Improving the performance of molecular qubits is a fundamental milestone towards unleashing power magnetism in second quantum revolution. Taming spin relaxation and decoherence due to vibrations crucial reach this milestone, but hindered by our lack understanding on nature their coupling spins. Here we propose synergistic approach study prototypical qubit. It combines inelastic X-ray scattering measure phonon dispersions along main symmetry directions crystal dynamics simulations...
Gate-based quantum computers typically encode and process information in two-dimensional units called qubits. Using d-dimensional qudits instead may offer intrinsic advantages, including more efficient circuit synthesis, problem-tailored encodings embedded error correction. In this work, we design a superconducting qudit-based processor wherein the logical space of transmon qubits is extended to higher-excited levels. We propose universal gate set featuring two-qudit cross-resonance...
The implementation of a universal quantum processor still poses fundamental issues related to error mitigation and correction, which demand investigate also platforms computing schemes alternative the main stream. A possibility is offered by employing multi-level logical units (qudits), naturally provided molecular spins. Here we present blueprint Molecular Spin Quantum Processor consisting single Nanomagnets, acting as qudits, placed within superconducting resonators adapted size...
The synthesis of a series heterometallic rings and chains is reported. family based on the octanuclear cages general formula [H(2)NR(2)][M(7)M'F(8)(O(2)CR')(16)], where M trivalent metal (Cr, Fe, V, Al, Ga or In), M' divalent (Mn, Co, Ni, Mg, Zn, Cd), R linear alkyl chain O(2)CR' one around twenty carboxylates. Other members with nonametallic decametallic cores are described, some new physics outlined, including initial investigations proposed application [Cr(7)Ni] as Qubits in quantum...
Exchange integrals and single-ion anisotropy parameters of a ring-shaped molecular cluster, comprising eight chromium(III) ions $(s=3/2)$ were determined by inelastic neutron scattering. Effects due to the mixing different spin multiplets have been considered. Such effects proved be important correctly reproduce relative intensity magnetic excitations in spectra. Evidence decreasing lifetimes with increasing energy excited states was found. The microscopic picture emerging from spectroscopy...
We propose a scheme for the implementation of quantum gates which is based on qubit encoding in antiferromagnetic molecular rings. show that proper engineering intercluster link would result an effective coupling vanishes as far system kept computational space, while it turned by selective excitation specific auxiliary states. These are also shown to allow performing single-qubit and two-qubit without individual addressing rings means local magnetic fields.
We present recent achievements and perspectives for the encoding of qubits with molecular spin clusters.
We characterize supramolecular magnetic structures, consisting of two weakly coupled antiferromagnetic rings, by low-temperature specific heat, susceptibility, magnetization and electron paramagnetic resonance measurements. Intra- inter-ring interactions are modeled through a microscopic spin-Hamiltonian approach that reproduces all the experimental data quantitatively legitimates use an effective two-qubit picture. Spin entanglement between rings is experimentally demonstrated...
Quantum simulators are controllable systems that can be used to simulate other quantum systems. Here we focus on the dynamics of a chain molecular qubits with interposed antiferromagnetic dimers. We theoretically show its controlled by means uniform magnetic pulses and mimic evolution systems, including fermionic ones. propose two proof-of-principle experiments based simulation Ising model in transverse field tunneling magnetization spin-1 system.
We demonstrate that the [Yb(trensal)] molecule is a prototypical coupled electronic qubit-nuclear qudit system. The combination of noise-resilient nuclear degrees freedom and large reduction nutation time induced by electron-nuclear mixing enables coherent manipulation this radio-frequency pulses. Moreover, multi-level structure exploited to encode operate qubit with embedded basic quantum error correction.
Molecular nanomagnets are attractive candidate qubits because of their wide inter- and intra-molecular tunability. Uniform magnetic pulses could be exploited to implement one- two-qubit gates in presence a properly engineered pattern interactions, but the synthesis suitable potentially scalable supramolecular complexes has proven very hard task. Indeed, no quantum algorithms have ever been implemented, not even proof-of-principle gate. Here we show that couplings two {Cr7Ni}-Ni-{Cr7Ni}...