Detection of qubit-oscillator entanglement in nanoelectromechanical systems

Abstract

Experiments over the past years have demonstrated that it is possible to bring nanomechanical resonators and superconducting qubits close to the quantum regime and to measure their properties with an accuracy close to the Heisenberg uncertainty limit. Therefore, it is just a question of time before we will routinely see true quantum effects in nanomechanical systems. One of the hallmarks of quantum mechanics is the existence of entangled states. We propose a realistic scenario making it possible to detect entanglement of a mechanical resonator and a qubit in a nanoelectromechanical setup. The detection scheme involves only standard current and noise measurements of an atomic point contact coupled to an oscillator and a qubit. This setup could allow for the first observation of entanglement between a continuous and a discrete quantum system in the solid state.

9 pages, 3 figures

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Cited by in corpus (16)

• Mechanical systems in the quantum regime
• Qubit thermometry for micromechanical resonators
• Entanglement between nitrogen vacancy spins in diamond controlled by a nanomechanical resonator
• Controllable coupling between a nanomechanical resonator and a coplanar-waveguide resonator via a superconducting flux qubit
• Detecting Majorana Bound States by Nanomechanics
• Generation of coherence in an exactly solvable nonlinear nanomechanical system
• Transport properties of Majorana bound states networks in the Coulomb blockade regime
• First-principles analysis of nanoelectromechanical systems using Loewner equation
• The Effect of Mechanical Resonance on Josephson Dynamics
• Hybrid quantum-classical chaotic NEMS
• Momentum and position detection in nanoelectromechanical systems beyond Born and Markov approximations
• Acute entanglement and Photon/Phonons statistics in a balanced/unbalanced PT-symmetry systems
• Scrambling and quantum feedback in a nanomechanical system
• Behavior of quantum entropies in polaronic systems
• Reservoir-Engineered Mechanical Cat States with a Driven Qubit
• Ladder of Loschmidt anomalies in the deep strong-coupling regime of a qubit-oscillator system