Single spin universal Boolean logic

Abstract

Recent advances in manipulating single electron spins in quantum dots have brought us close to the realization of classical logic gates based on representing binary bits in spin polarizations of single electrons. Here, we show that a linear array of three quantum dots, each containing a single spin polarized electron, and with nearest neighbor exchange coupling, acts as the universal NAND gate. The energy dissipated during switching this gate is the Landauer-Shannon limit of kTln(1/p) [T = ambient temperature and p = intrinsic gate error probability]. With present day technology, p = 1E-9 is achievable above 1 K temperature. Even with this small intrinsic error probability, the energy dissipated during switching the NAND gate is only ~ 21 kT, while today's nanoscale transistors dissipate about 40,000 - 50,000 kT when they switch.

References in corpus (9)

• Single-shot read-out of an individual electron spin in a quantum dot
• Driven coherent oscillations of a single electron spin in a quantum dot
• Quantum Computing with Very Noisy Devices
• Zeeman energy and spin relaxation in a one-electron quantum dot
• Spin relaxation in a nanowire organic spin valve: Observation of extremely long spin relaxation times
• Electron spin coherence in semiconductors: Considerations for a spin-based solid state quantum computer architecture
• Interacting Systems for Self-Correcting Low Power Switching
• Computing with spins: From classical to quantum computing
• Metastable states and information propagation in a 1D array of locally-coupled bistable cells

Cited by in corpus (4)

• Topological Frustration in Graphene Nanoflakes: Magnetic Order and Spin Logic Devices
• Giant magnetic exchange coupling in rhombus-shaped nanographenes with zigzag periphery
• Electron Spin for Classical Information Processing: A Brief Survey of Spin-Based Logic Devices, Gates and Circuits
• Anomalous Electron Transport in Field-Effect Transistors with Titanium Ditelluride Semimetal Thin-Film Channels