Excited rotational states of molecules in a superfluid

Igor N. Cherepanov; Giacomo Bighin; Constant Alexandre Schouder; Adam Simon Chatterley; Simon Høgh Albrechtsen; Albert Vinas Munoz; Lars Christiansen; Henrik Stapelfeldt; Mikhail Lemeshko

doi:10.1103/PhysRevA.104.L061303

Excited rotational states of molecules in a superfluid

Igor N. Cherepanov, Giacomo Bighin, Constant Alexandre Schouder, Adam Simon Chatterley, Simon Høgh Albrechtsen, Albert Vinas Munoz, Lars Christiansen, Henrik Stapelfeldt^*, Mikhail Lemeshko

^*Corresponding author af dette arbejde

Institut for Kemi

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Letter

Abstract

We combine experimental and theoretical approaches to explore excited rotational states of molecules embedded in helium nanodroplets using CS2 and I2 as examples. Laser-induced nonadiabatic molecular alignment is employed to measure spectral lines for rotational states extending beyond those initially populated at the 0.37 K droplet temperature. We construct a simple quantum-mechanical model, based on a linear rotor coupled to a single-mode bosonic bath, to determine the rotational energy structure in its entirety. The calculated and measured spectral lines are in good agreement. We show that the effect of the surrounding superfluid on molecular rotation can be rationalized by a single quantity, the angular momentum, transferred from the molecule to the droplet.

Originalsprog	Engelsk
Artikelnummer	L061303
Tidsskrift	Physical Review A
Vol/bind	104
Nummer	6
Antal sider	5
ISSN	2469-9926
DOI	https://doi.org/10.1103/PhysRevA.104.L061303
Status	Udgivet - 30 dec. 2021

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abstract = "We combine experimental and theoretical approaches to explore excited rotational states of molecules embedded in helium nanodroplets using CS2 and I2 as examples. Laser-induced nonadiabatic molecular alignment is employed to measure spectral lines for rotational states extending beyond those initially populated at the 0.37 K droplet temperature. We construct a simple quantum-mechanical model, based on a linear rotor coupled to a single-mode bosonic bath, to determine the rotational energy structure in its entirety. The calculated and measured spectral lines are in good agreement. We show that the effect of the surrounding superfluid on molecular rotation can be rationalized by a single quantity, the angular momentum, transferred from the molecule to the droplet.",

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AU - Cherepanov, Igor N.

AU - Bighin, Giacomo

AU - Schouder, Constant Alexandre

AU - Chatterley, Adam Simon

AU - Albrechtsen, Simon Høgh

AU - Vinas Munoz, Albert

AU - Christiansen, Lars

AU - Stapelfeldt, Henrik

AU - Lemeshko, Mikhail

PY - 2021/12/30

Y1 - 2021/12/30

N2 - We combine experimental and theoretical approaches to explore excited rotational states of molecules embedded in helium nanodroplets using CS2 and I2 as examples. Laser-induced nonadiabatic molecular alignment is employed to measure spectral lines for rotational states extending beyond those initially populated at the 0.37 K droplet temperature. We construct a simple quantum-mechanical model, based on a linear rotor coupled to a single-mode bosonic bath, to determine the rotational energy structure in its entirety. The calculated and measured spectral lines are in good agreement. We show that the effect of the surrounding superfluid on molecular rotation can be rationalized by a single quantity, the angular momentum, transferred from the molecule to the droplet.

AB - We combine experimental and theoretical approaches to explore excited rotational states of molecules embedded in helium nanodroplets using CS2 and I2 as examples. Laser-induced nonadiabatic molecular alignment is employed to measure spectral lines for rotational states extending beyond those initially populated at the 0.37 K droplet temperature. We construct a simple quantum-mechanical model, based on a linear rotor coupled to a single-mode bosonic bath, to determine the rotational energy structure in its entirety. The calculated and measured spectral lines are in good agreement. We show that the effect of the surrounding superfluid on molecular rotation can be rationalized by a single quantity, the angular momentum, transferred from the molecule to the droplet.

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U2 - 10.1103/PhysRevA.104.L061303

DO - 10.1103/PhysRevA.104.L061303

M3 - Letter

SN - 2469-9926

VL - 104

JO - Physical Review A

JF - Physical Review A

IS - 6

M1 - L061303

ER -

Excited rotational states of molecules in a superfluid

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