Environment-assisted quantum control of a solid-state spin via coherent dark states

Abstract

Understanding the interplay between a quantum system and its environment lies at the heart of quantum science and its applications. To-date most efforts have focused on circumventing decoherence induced by the environment by either protecting the system from the associated noise or by manipulating the environment directly. Recently, parallel efforts using the environment as a resource have emerged, which could enable dissipation-driven quantum computation and coupling of distant quantum bits. Here, we realize the optical control of a semiconductor quantum-dot spin by relying on its interaction with an adiabatically evolving spin environment. The emergence of hyperfine-induced, quasi-static optical selection rules enables the optical generation of coherent spin dark states without an external magnetic field. We show that the phase and amplitude of the lasers implement multi-axis manipulation of the basis spanned by the dark and bright states, enabling control via projection into a spin-superposition state. Our approach can be extended, within the scope of quantum control and feedback, to other systems interacting with an adiabatically evolving environment.

Additional data and analysis is available for download in PDF format at the publications section of http://www.amop.phy.cam.ac.uk/amop-ma/

References in corpus (7)

• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Quantum States and Phases in Driven Open Quantum Systems with Cold Atoms
• Universal quantum control of two-electron spin quantum bits using dynamic nuclear polarization
• Nuclear spin physics in quantum dots: an optical investigation
• A photonic cluster state machine gun
• Coherent Population Trapping of an Electron Spin in a Single Negatively Charged Quantum Dot
• Electromagnetically Induced Transparency with an Ensemble of Donor-Bound Electron Spins in a Semiconductor

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• Extended linear regime of cavity-QED enhanced optical circular birefringence induced by a charged quantum dot
• Dynamics of a mesoscopic nuclear spin ensemble interacting with an optically driven electron spin
• Spin-selective AC Stark shifts in a charged quantum dot
• Coherent control of dissipative dynamics in a periodically driven lattice array
• Direct high resolution resonant Raman scattering measurements of InAs quantum dot dynamic nuclear spin polarization states