Sympathetic cooling of molecular ion motion to the ground state

Rugango, René; Goeders, James; Dixon, T. H.; Gray, Joshua; Khanyile, Ncamiso; Shu, Gang; Clark, Robert; Brown, Kenneth R.

doi:10.1088/1367-2630/17/3/035009

Cited by 46 publications

(44 citation statements)

References 39 publications

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“…These are particularly advanced for single molecular ions [278,279]. The molecules can be simple diatomics or large biological chromophors such as rhodopsin.…”

Section: Mid-term Prospects: Goals and Challengesmentioning

confidence: 99%

Training Schrödinger’s cat: quantum optimal control

et al. 2015

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Abstract. It is control that turns scientific knowledge into useful technology: in physics and engineering it provides a systematic way for driving a dynamical system from a given initial state into a desired target state with minimized expenditure of energy and resources. As one of the cornerstones for enabling quantum technologies, optimal quantum control keeps evolving and expanding into areas as diverse as quantumenhanced sensing, manipulation of single spins, photons, or atoms, optical spectroscopy, photochemistry, magnetic resonance (spectroscopy as well as medical imaging), quantum information processing and quantum simulation. In this communication, state-of-the-art quantum control techniques are reviewed and put into perspective by a consortium of experts in optimal control theory and applications to spectroscopy, imaging, as well as quantum dynamics of closed and open systems. We address key challenges and sketch a roadmap for future developments. ForewordThe authors of this paper represent the QUAINT consortium, a European Coordination Action on Optimal Control of Quantum Systems, funded by the European Commission Framework Programme 7, Future Emerging Technologies FET-OPEN programme and the Virtual Facility for Quantum Control (VF-QC). This consortium has considerable expertise in optimal control theory and its applications to quantum systems, both in existing areas, such as spectroscopy and imaging, and in emerging quantum technologies, such as quantum information processing, quantum communication, quantum simulation a e-mail: fwm@lusi.uni-sb.de and quantum sensing. The list of challenges for quantum control has been gathered by a broad poll of leading researchers across the communities of general and mathematical control theory, atomic, molecular-, and chemical physics, electron and nuclear magnetic resonance spectroscopy, as well as medical imaging, quantum information, communication and simulation. 144 experts in these fields have provided feedback and specific input on the state of the art, mid-term and long-term goals. Those have been summarized in this document, which can be viewed as a perspectives paper, providing a roadmap for the future development of quantum control. Because such an endeavour can hardly ever be complete (there are many additional areas of quantum control applications, such as spintronics, nano-optomechanical technologies etc.), this roadmap

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“…These are particularly advanced for single molecular ions [278,279]. The molecules can be simple diatomics or large biological chromophors such as rhodopsin.…”

Section: Mid-term Prospects: Goals and Challengesmentioning

confidence: 99%

Training Schrödinger’s cat: quantum optimal control

et al. 2015

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“…Application of methods from the laser-cooling of atomic ions has led to new advances in taming both external and internal quantum states of trapped molecular ions. The new techniques have allowed for the sympathetic sideband cooling of motional modes to the ground state [6,7], preparation of the rotational ground state [8,9,10], and the non-destructive probing of rotational states [11]. The large rotational constants of diatomic hydrides [9,10,8,12] which slows blackbody rethermalization after rotational cooling combined with the availability of atomic coolants of similar masses make these molecular ions particularly well-suited to high precision spectroscopy measurements.…”

Section: Introductionmentioning

confidence: 99%

Vibronic Spectroscopy of Sympathetically Cooled CaH⁺

et al. 2016

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We report the measurement of the 1 1 Σ −→ 2 1 Σ transition of CaH + by resonance-enhanced photodissociation of CaH + that is co-trapped with laser-cooled Ca + . We observe four resonances that we assign to transitions from the vibrational v=0 ground state to the v =1-4 excited states based on theoretical predictions. A simple theoretical model that assumes instantaneous dissociation after resonant excitation yield results in good agreement with the observed spectral features except for the unobserved v =0 peak. The resolution of our experiment is limited by the mode-locked excitation laser, but this survey spectroscopy enables future rotationally resolved studies with applications in astrochemistry and precision measurement. 1

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“…11 Sympathetic cooling relying on the Coulomb interaction between dissimilar ions is very efficient. For instance small ion crystals including molecular ions have been cooled to the motional ground state (63 ). Using an astute selective photo-ionization scheme combined with sympathetic cooling it has been possible to produce samples of rotationally and vibrationally state-selected, translationally cold molecular ions (64 ).…”

Section: Notesmentioning

confidence: 99%

Studying fundamental physics using quantum enabled technologies with trapped molecular ions

Segal

Lorent

Dubessy

et al. 2017

Journal of Modern Optics

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The text below was written during two visits that Daniel Segal made at Université Paris 13. Danny stayed at Laboratoire de Physique des Lasers the summers of 2008 and 2009 to participate in the exploration of a novel lead in the field of ultrahigh resolution spectroscopy. Our idea was to probe trapped molecular ions using Quantum Logic Spectroscopy (QLS) in order to advance our understanding of a variety of fundamental processes in nature. At that time, QLS, a ground-breaking spectroscopic technique, had only been demonstrated with atomic ions. Our ultimate goals were new approaches to the observation of parity violation in chiral molecules and tests of time variations of the fundamental constants. This text is the original research proposal written eight years ago. We have added a series of notes to revisit it in the light of what has been since realized in the field. KEYWORDSCold molecular ions; tests of fundamental physics; quantum logic spectroscopy; ultra-high resolution molecular spectroscopy; parity violation; variations in the fundamental constants * Deceased.

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Sympathetic cooling of molecular ion motion to the ground state

Cited by 46 publications

References 39 publications

Training Schrödinger’s cat: quantum optimal control

Training Schrödinger’s cat: quantum optimal control

Vibronic Spectroscopy of Sympathetically Cooled CaH⁺

Studying fundamental physics using quantum enabled technologies with trapped molecular ions

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Sympathetic cooling of molecular ion motion to the ground state

Cited by 46 publications

References 39 publications

Training Schrödinger’s cat: quantum optimal control

Training Schrödinger’s cat: quantum optimal control

Vibronic Spectroscopy of Sympathetically Cooled CaH+

Studying fundamental physics using quantum enabled technologies with trapped molecular ions

Contact Info

Product

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Vibronic Spectroscopy of Sympathetically Cooled CaH⁺