Collectively Enhanced Interactions in Solid-state Spin Qubits

Abstract

We propose and analyze a technique to collectively enhance interactions between solid-state quantum registers composed from random networks of spin qubits. In such systems, disordered dipolar interactions generically result in localization. Here, we demonstrate the emergence of a single collective delocalized eigenmode as one turns on a transverse magnetic field. The interaction strength between this symmetric collective mode and a remote spin qubit is enhanced by square root of the number of spins participating in the delocalized mode. Mediated by such collective enhancement, long-range quantum logic between remote spin registers can occur at distances consistent with optical addressing. A specific implementation utilizing Nitrogen-Vacancy defects in diamond is discussed and the effects of decoherence are considered.

5 pages, 4 figures

References in corpus (13)

• Quantum teleportation between light and matter
• Universal dynamical decoupling of a single solid-state spin from a spin bath
• High-fidelity projective readout of a solid-state spin quantum register
• Strong atom-field coupling for Bose-Einstein condensates in an optical cavity on a chip
• Crossover from a molecular Bose-Einstein condensate to a degenerate Fermi gas
• Cavity QED with a Bose-Einstein condensate
• Extending Quantum Coherence in Diamond
• Evidence for coherent collective Rydberg excitation in the strong blockade regime
• Chip-scale nanofabrication of single spins and spin arrays in diamond
• Quenching Spin Decoherence in Diamond through Spin Bath Polarization
• Dynamical Decoupling of a single electron spin at room temperature
• Electron spin decoherence of single Nitrogen-Vacancy defects in diamond
• Interfacing Collective Atomic Excitations and Single Photons