Spin-Based Quantum Computers made by Chemistry: Hows and Whys

Abstract

This introductory review discusses the main problems facing the attempt to build quantum information processing systems (like quantum computers) from spin-based qubits. We emphasize 'bottom-up' attempts using methods from chemistry. The essentials of quantum computing are explained, along with a description of the qubits and their interactions in terms of physical spin qubits. The main problem to be overcome is decoherence - how this works is described, along with ways to suppress contributions from spin bath and oscillator bath environments, and from dipolar interactions. Finally we discuss various strategies for making chemistry-based spin qubits, using both magnetic molecules and magnetic ions.

13 pages, 10 figures

References in corpus (9)

• Spin qubits with electrically gated polyoxometalate molecules
• Pair-wise decoherence in coupled spin qubit networks
• The low-$T$ phase diagram of $\mathrm{LiH}{\mathrm{o}}_{\mathrm{x}}{\mathrm{Y}}_{1-\mathrm{x}}{\mathrm{F}}_4$
• Quantum Walks, Quantum Gates and Quantum Computers
• Nuclear spin dynamics in the quantum regime of a single-molecule magnet
• Decoherence by Correlated Noise and Quantum Error Correction
• Coherent manipulation of electron spins up to ambient temperatures in Cr${}^{5+}$(S=1/2) doped K${}_3$NbO${}_8$
• Resilient Quantum Computation in Correlated Environments: A Quantum Phase Transition Perspective
• Dynamics and thermalization of the nuclear spin bath in the single-molecule magnet Mn12-ac: test for the theory of spin tunneling

Cited by in corpus (7)

• The role of the quadrupolar interaction in the tunneling dynamics of lanthanide molecular magnets
• Introduction of spin centers in single crystals of Ba${}_2$CaWO${}_{6-\delta }$
• Decoherence measurements in crystals of molecular magnets
• Electrical two-qubit gates within a pair of clock-qubit magnetic molecules
• Room-temperature entanglement of the nickel-radical molecular complex (Et3NH)[Ni(hfac)2L]
• Assessing the potential of perfect screw dislocations in SiC for solid-state quantum technologies
• Towards lattice-gas description of low-temperature properties above the Haldane and cluster-based Haldane ground states of a mixed spin-(1,1/2) Heisenberg octahedral chain