A5028305118- Quantum and electron transport phenomena
- Quantum Computing Algorithms and Architecture
- Magnetism in coordination complexes
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Quantum Information and Cryptography
- Molecular Junctions and Nanostructures
- Advanced NMR Techniques and Applications
- Spectroscopy and Quantum Chemical Studies
- Electron Spin Resonance Studies
- Auction Theory and Applications
- Organic and Molecular Conductors Research
- Molecular spectroscopy and chirality
- Atomic and Subatomic Physics Research
- Experimental Behavioral Economics Studies
- Lanthanide and Transition Metal Complexes
- Quantum-Dot Cellular Automata
- Scientific Computing and Data Management
- Quantum Mechanics and Applications
- Quantum optics and atomic interactions
- Porphyrin and Phthalocyanine Chemistry
- Game Theory and Applications
- Economic theories and models
- Neural Networks and Reservoir Computing
- Consumer Market Behavior and Pricing
University of Parma
2016-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca
2022-2025
National Interuniversity Consortium of Materials Science and Technology
2020-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
2022
Forschungszentrum Jülich
2013-2019
ANT Foundation Italy Onlus
2015
Massachusetts Institute of Technology
2012
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 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.
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...
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...
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}...
Quantum information processing (QIP) could revolutionize how we simulate and understand quantum systems. Any QIP scheme requires both individual units (qubits) that have long phase memories switchable can be placed between the qubits. Here, describe supramolecular systems where {Cr7Ni} rings are used as qubits, linked by redox-switchable {Ru2M} oxo-centered triangles (M = Zn, Ni, or Co). The assemblies been structurally characterized involve two bound to through iso-nicotinate ligands....
We show that a [Er-Ce-Er] molecular trinuclear coordination compound is promising platform to implement the three-qubit quantum error correction code protecting against pure dephasing, most important in magnetic molecules. characterize it by preparing [Lu-Ce-Lu] and [Er-La-Er] analogues, which contain only one of two types qubit, combining magnetometry, low-temperature specific heat electron paramagnetic resonance measurements on both elementary constituents trimer. Using resulting...
By a combined theoretical and broadband nuclear magnetic resonance study, we show that [VOTPP] is coupled electronic qubit-nuclear qudit system suitable to implement qudit-based quantum error correction simulation algorithms.
We discuss a cost-effective approach to understand magnetic relaxation in the new generation of rare-earth single-molecule magnets. It combines ab initio calculations crystal field parameters, magneto-elastic coupling with local modes, and phonon density states fitting only three microscopic parameters. Although much less demanding than fully approach, method gives important physical insights into origin observed relaxation. By applying it high-anisotropy compounds very different relaxation,...
Thanks to the large number of levels which can be coherently manipulated, molecular spin systems constitute a very promising platform for quantum computing. Indeed, they embed error correction within single objects, thus greatly simplifying its actual realization in short term. We consider recent proposal, exploits qudit encode protected unit, and is tailored fight pure dephasing. Here we compare implementation this code on different molecules, provided by either an electronic or nuclear (S,...
We report a supramolecule that contains five spins of two different types and with, crucially, predictable interaction energies between the spins. The is characterized, are demonstrated by electron paramagnetic resonance (EPR) spectroscopy. Based on measured parameters, we propose experiments would allow this designed to be used simulate quantum decoherence in maximally entangled Bell states could teleportation.
The use of d-level qudits instead two-level qubits can largely increase the power quantum logic for many applications, ranging from simulations to error correction. Magnetic molecules are ideal spin systems realize these large-dimensional qudits. Indeed, their Hamiltonian be engineered an unparalleled extent and yield a spectrum with low-energy states. In particular, in past decade, intense theoretical, experimental, synthesis efforts have been devoted develop simulators based on molecular...
Molecular Nanomagnets may enable the implementation of qudit-based quantum error-correction codes which exploit many spin levels naturally embedded in a single molecule, promising step towards scalable processors. To fully realize potential this approach, microscopic understanding errors corrupting information encoded molecular qudit is essential, together with development tailor-made error correction strategies. We address these central points by first studying dephasing effects on produced...
Understanding chiral induced spin-selectivity (CISS), resulting from charge transport through helical systems, has recently inspired many experimental and theoretical efforts, but is still object of intense debate. In order to assess the nature CISS, we propose focus on electron-transfer processes occurring at single-molecule level. We design simple magnetic resonance experiments, exploiting a qubit as highly sensitive coherent sensor, provide clear signatures acceptor polarization....
Molecular spin qudits provide an ideal platform to simulate strong light-matter interactions. We propose a possible realization of this setup, consisting s = 1/2 and S > 1 transition metal ions dimer, solely controlled by microwave pulses.
It is well assessed that the charge transport through a chiral potential barrier can result in spin-polarized charges. The possibility of driving this process visible photons holds tremendous for several aspects quantum information science, e.g., optical control and readout qubits. In context, direct observation phenomenon via spin-sensitive spectroscopies utmost importance to establish future guidelines photo-driven spin selectivity structures. Here, we provide proof time-resolved electron...
We pinpoint the key ingredients ruling decoherence in multispin clusters, and we engineer system Hamiltonian to design optimal molecules embedding quantum error correction. These are antiferromagnetically coupled systems with competing exchange interactions, characterized by many low-energy states which is dramatically suppressed does not increase size. This feature allows us derive optimized code words, enhancing power of correction orders magnitude. demonstrate this a complete simulation...