State expansion of a levitated nanoparticle in a dark harmonic potential
Physical Review Letters, 2024•APS
We spatially expand and subsequently contract the motional thermal state of a levitated
nanoparticle using a hybrid trapping scheme. The particle's center-of-mass motion is
initialized in a thermal state (temperature 155 mK) in an optical trap and then expanded by
subsequent evolution in a much softer Paul trap in the absence of optical fields. We
demonstrate expansion of the motional state's standard deviation in position by a factor of
24. In our system, state expansion occurs devoid of backaction from photon recoil, making …
nanoparticle using a hybrid trapping scheme. The particle's center-of-mass motion is
initialized in a thermal state (temperature 155 mK) in an optical trap and then expanded by
subsequent evolution in a much softer Paul trap in the absence of optical fields. We
demonstrate expansion of the motional state's standard deviation in position by a factor of
24. In our system, state expansion occurs devoid of backaction from photon recoil, making …
We spatially expand and subsequently contract the motional thermal state of a levitated nanoparticle using a hybrid trapping scheme. The particle’s center-of-mass motion is initialized in a thermal state (temperature 155 mK) in an optical trap and then expanded by subsequent evolution in a much softer Paul trap in the absence of optical fields. We demonstrate expansion of the motional state’s standard deviation in position by a factor of 24. In our system, state expansion occurs devoid of backaction from photon recoil, making this approach suitable for coherent wave function expansion.
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