Quantum state tomography of molecular rotation

Mouritzen, Anders S.; Mølmer, Klaus

doi:10.1063/1.2208351

Cited by 35 publications

(26 citation statements)

References 21 publications

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“…The present high-resolution imaging would be an ideal experimental approach for this objective. When the quality of the observed time-dependent angular distribution is high enough, full experimental reconstruction of the wave packet or, more generally, the density matrix for the final state is feasible ( 38 ). High-throughput data acquisition of the present ion-imaging setup may fulfill the criteria.…”

Section: Discussionmentioning

confidence: 99%

Quantum unidirectional rotation directly imaged with molecules

et al. 2015

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Section: Discussionmentioning

confidence: 99%

Quantum unidirectional rotation directly imaged with molecules

et al. 2015

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“…With these time-dependent angular distributions for rotational wave packet with selected populations, the rotational quantum state might be reconstructed experimentally. 34 The above generation and characterization of the rotational wave packet with selected populations are accessible in the current experimental technologies. The initial single rotational state can be prepared by supersonic cooling or selected by a hexapole electric field.…”

mentioning

confidence: 99%

Controlling molecular rotational population by wave-packet interference

Zeng

Gao

et al. 2009

The Journal of Chemical Physics

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We propose a control scheme for selecting populations of molecular rotational states by wave-packet interference. A series of coherent rotational wave packets is created by nonadiabatic rotational excitation of molecules using two strong femtosecond laser pulses. By adjusting the time delay between the two laser pulses, constructive or destructive interference among these wave packets enables the population to be enhanced or suppressed for a specific rotational state. The evolution of the rotational wave packet with selected populations produces interference patterns with controlled spatial symmetries. This method provides an approach to prepare a molecular ensemble with selected quantum-state distributions and controlled spatial distributions under field-free condition.

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“…For a system with Hamiltonian , the established 1D QT method makes use of knowledge of the non-interacting part of the Hamiltonian , so that its eigenfunctions can be pre-calculated and used in the tomographic reconstruction of density matrix through integral inversion transform. However, the dimension problem as demonstrated in the pioneering works 29 , 30 mathematically leads to singularity in the inversion from the evolving probability distribution to the density matrix and makes it challenging for higher dimensional QT.…”

Section: Resultsmentioning

confidence: 99%

Quantum state tomography of molecules by ultrafast diffraction

Zhang

Xiong

et al. 2021

Nat Commun

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Ultrafast electron diffraction and time-resolved serial crystallography are the basis of the ongoing revolution in capturing at the atomic level of detail the structural dynamics of molecules. However, most experiments capture only the probability density of the nuclear wavepackets to determine the time-dependent molecular structures, while the full quantum state has not been accessed. Here, we introduce a framework for the preparation and ultrafast coherent diffraction from rotational wave packets of molecules, and we establish a new variant of quantum state tomography for ultrafast electron diffraction to characterize the molecular quantum states. The ability to reconstruct the density matrix, which encodes the amplitude and phase of the wavepacket, for molecules of arbitrary degrees of freedom, will enable the reconstruction of a quantum molecular movie from experimental x-ray or electron diffraction data.

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Quantum state tomography of molecular rotation

Cited by 35 publications

References 21 publications

Quantum unidirectional rotation directly imaged with molecules

Quantum unidirectional rotation directly imaged with molecules

Controlling molecular rotational population by wave-packet interference

Quantum state tomography of molecules by ultrafast diffraction

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