Abstract
Preparing and observing quantum states of nanoscale particles is a challenging task with great relevance for quantum technologies and tests of fundamental physics. In contrast to atomic systems with discrete transitions, nanoparticles exhibit a practically continuous absorption spectrum and thus their quantum dynamics cannot be easily manipulated. Here, we demonstrate that charged nanoscale dielectrics can be artificially endowed with a discrete level structure by coherently interfacing their rotational and translational motion with a superconducting qubit. We propose a pulsed scheme for the generation and read-out of motional quantum superpositions and entanglement between several levitated nanoparticles, providing an all-electric platform for networked hybrid quantum devices.
Highlights
Opto- and electromechanical systems are at the cutting edge of modern quantum devices[1,2,3], with great potential for technological application and fundamental tests[4,5,6]
Levitated nanoparticles have been successfully cooled into their motional quantum groundstate[8], opening the door to free-fall center-ofmass[9,10,11] and rotational[12,13] quantum superposition tests
We demonstrate that the states of a superconducting qubit can be used to manipulate and read out the quantum dynamics of a charged nanoparticle levitated in a Paul trap
Summary
Opto- and electromechanical systems are at the cutting edge of modern quantum devices[1,2,3], with great potential for technological application and fundamental tests[4,5,6]. Levitating nanoscale objects almost perfectly isolates them from their surroundings, enabling superior force sensitivity and coherence times[7]. Levitated nanoparticles have been successfully cooled into their motional quantum groundstate[8], opening the door to free-fall center-ofmass[9,10,11] and rotational[12,13] quantum superposition tests. The fact that nanoscale particles lack the discrete internal spectrum of atoms or other microscopic quantum systems makes it difficult to address them coherently with laser pulses
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