Cooling a nanomechanical resonator by a triple quantum dot

Abstract

We propose an approach for achieving ground-state cooling of a nanomechanical resonator (NAMR) capacitively coupled to a triple quantum dot (TQD). This TQD is an electronic analog of a three-level atom in $\Lambda$ configuration which allows an electron to enter it via lower-energy states and to exit only from a higher-energy state. By tuning the degeneracy of the two lower-energy states in the TQD, an electron can be trapped in a dark state caused by destructive quantum interference between the two tunneling pathways to the higher-energy state. Therefore, ground-state cooling of an NAMR can be achieved when electrons absorb readily and repeatedly energy quanta from the NAMR for excitations.

6 pages, 3 figures

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• Steady quantum coherence in non-equilibrium environment
• Ground-State Cooling of a Mechanical Oscillator by Interference in Andreev Reflection
• Cooling by heating in nonequilibrium nanosystems
• Spin entangled two-particle dark state in quantum transport through coupled quantum dots
• Performance analysis of nanostructured Peltier coolers
• Quantum interference in transport through almost symmetric double quantum dots
• Charge-vibration interaction effects in normal-superconductor quantum dots
• Two-particle dark state cooling of a nanomechanical resonator
• Topological quantum interference in a pumped Su-Schrieffer-Heeger lattice
• Realistic non-local refrigeration engine based on Coulomb coupled systems
• Quantum refrigerator driven by nonclassical light
• Steady-state solution for dark states using a three-level system in coupled quantum dots
• Fast optical cooling of a nanomechanical cantilever by a dynamical Stark-shift gate
• Reducing thermal noises by quantum refrigerators