Spin qubits with electrically gated polyoxometalate molecules

Abstract

Spin qubits offer one of the most promising routes to the implementation of quantum computers. Very recent results in semiconductor quantum dots show that electrically-controlled gating schemes are particularly well-suited for the realization of a universal set of quantum logical gates. Scalability to a larger number of qubits, however, remains an issue for such semiconductor quantum dots. In contrast, a chemical bottom-up approach allows one to produce identical units in which localized spins represent the qubits. Molecular magnetism has produced a wide range of systems with tailored properties, but molecules permitting electrical gating have been lacking. Here we propose to use the polyoxometalate [PMo12O40(VO)2]q-, where two localized spins-1/2 can be coupled through the electrons of the central core. Via electrical manipulation of the molecular redox potential, the charge of the core can be changed. With this setup, two-qubit gates and qubit readout can be implemented.

9 pages, 6 figures, to appear in Nature Nanotechnology

References in corpus (14)

• Quantum Computation with Quantum Dots
• Elementary gates for quantum computation
• Quantum Computing in Molecular Magnets
• Electron transport through double quantum dots
• Coupled quantum dots as quantum gates
• Driven coherent oscillations of a single electron spin in a quantum dot
• Will spin-relaxation times in molecular magnets permit quantum information processing?
• Driven quantum transport on the nanoscale
• Complete Characterization of a Quantum Process: the Two-Bit Quantum Gate
• Electron transport through single Mn12 molecular magnets
• Signatures of Molecular Magnetism in Single-Molecule Transport Spectroscopy
• Detection of Single Spin Decoherence in a Quantum Dot via Charge Currents
• Quantum-gate implementation in permanently coupled AF spin rings without need of local fields
• Cotunneling current through quantum dots with phonon-assisted spin-flip processes

Cited by in corpus (47)

• Spin-Based Quantum Computers made by Chemistry: Hows and Whys
• Spin-Electric Coupling in Molecular Magnets
• Electric Field Controlled Magnetic Anisotropy in a Single Molecule
• Magnetic Cluster Excitations
• Electrical manipulation of spin states in a single electrostatically gated transition-metal complex
• Molecular prototypes for spin-based CNOT quantum gates
• Spin dynamics in InAs-nanowire quantum-dots coupled to a transmission line
• Nuclear Spins in Nanostructures
• Spin dynamics of molecular nanomagnets fully unraveled by four-dimensional inelastic neutron scattering
• Single-molecule Nanomagnets
• Giant resistance change across the phase transition in spin crossover molecules
• Electric field control of spins in molecular magnets
• Charge transport through single molecules, quantum dots, and quantum wires
• Spin electric effects in molecular antiferromagnets
• Control of electron spin decoherence caused by electron-nuclear spin dynamics in a quantum dot
• Molecular nanomagnets as quantum simulators
• Coherent spin-exchange via a quantum mediator
• Band gap prediction for large organic crystal structures with machine learning
• Redox-Induced Gating of the Exchange Interactions in a Single Organic Diradical
• Spin-bias driven magnetization reversal and nondestructive detection in a single molecular magnet
• Molecular Nanoelectronics
• Entanglement and Bell's inequality violation above room temperature in metal carboxylates
• Hyperfine-induced decoherence in triangular spin-cluster qubits
• Tunable Spin Qubit Coupling Mediated by a Multi-Electron Quantum Dot
• First-principle studies of the spin-orbit and the Dzyaloshinskii-Moriya interactions in the \{Cu${}_3$\} single-molecule magnet
• Probing frontier orbital energies of (Co9(P2W15)3) polyoxometalate clusters at molecule-metal and molecule-water interfaces
• Entanglement temperature in molecular magnets composed of S-spin dimers
• Spin Entanglement in supramolecular structures
• Manipulation of organic polyradicals in a single-molecule transistor
• Fast Long-Distance Control of Spin Qubits by Photon Assisted Cotunneling
• Entangling remote nuclear spins linked by a chromophore
• Effects of magnetic field and transverse anisotropy on full counting statistics in single-molecule magnet
• First-principles many-body models for electron transport through molecular nanomagnets
• Theoretical evaluation of [V${}^{IV}$(α-C${}_3$S${}_5$)]${}^2-$ as nuclear-spin sensitive single-molecule spin transistor
• Electrical two-qubit gates within a pair of clock-qubit magnetic molecules
• Anomalous excitations of atomically crafted quantum magnets
• Electron transport in the four-lead two-impurity Kondo model: Nonequilibrium perturbation theory with almost degenerate levels
• Electron transport across electrically switchable magnetic molecules
• Finite-temperature decoherence of spin states in a $\text{{}{\text{Cu}}_3\text{}}$ single molecular magnet
• Spin wave excitations of magnetic metalorganic materials
• Theory of spin qubits in nanostructures
• Thermodynamic and magnetocaloric properties of a triangular spin-1/2 cluster with Dzyaloshinskii-Moriya interaction
• Using near-flat-band electrons for read-out of molecular spin qubit entangled states
• Magnetoelectric effect in the mixed valence polyoxovanadate cage V${}_{12}$
• Two-spin and multi-spin quantum entanglement in V12 polyoxovanadate molecular nanomagnet
• Quantum Gates Between Two Spins in a Triple Dot System with an Empty Dot
• Cotunneling signatures of Spin-Electric coupling in frustrated triangular molecular magnets