Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Frontiers in Optics

Ultra-Efficient Cooling of Resonators: Beating Sideband Cooling with Quantum Control

Sai Vinjanampathy, Xiaoting Wang, Fredrick W. Strauch, Kurt A. Jacobs

Published Jan 1, 2011• 16 citations
Publisher

Abstract

we present a scheme to cool resonators that employ the same configuration as sideband cooling, though we achieve significantly colder temperatures. We also present a method for fast, high-fidelity quantum information transfer between resonators.
DOI
10.1364/fio.2011.jtua34

Related papers

Ultraefficient Cooling of Resonators: Beating Sideband Cooling with Quantum Control

Xiaoting Wang, Sai Vinjanampathy, Frederick W. Strauch +1 more

The present state of the art in cooling mechanical resonators is a version of sideband cooling. Here we present a method that uses the same configuration as sideband cooling-coupling the resonator to be cooled to a second microwave (or optical) auxiliary resonator-but will cool significantly colder. This is achieved by varying the strength of the coupling between the two resonators over a time on the order of the period of the mechanical resonator. As part of our analysis, we also obtain a method for fast, high-fidelity quantum information transfer between resonators.

arXiv:1103.5750•Physical Review Letters•Oct 19, 2011•111 citations

High fidelity source of single atoms in the quantum ground state of optical tweezers

Mikkel F. Andersen, Pimonpan Sompet, Eyal Schwartz +1 more

Summary form only given. Complete control of individual atoms trapped in far-off resonance optical tweezers is vital for gaining a better understanding of the microscopic world. It will provide a platform with unprecedented flexibility for studying few-body physics, and might lead to new quantum technologies. By combining near-deterministic preparation of single atoms [1-3] with Zeeman-insensitive Raman sideband cooling [4], we present a push button method to prepare a single 85Rb atom in its centre of mass ground state with high fidelity. Our Raman sideband cooling scheme works efficiently in an environment with magnetic field fluctuations that were too large for other Raman sideband cooling variations [5,6]. In 2D, we achieve a fidelity for the entire loading procedure of ~0.7 for a single atom in the ground state of the optical tweezers. In 3D, the fidelity drops to 0.1 since the cooling is less efficient for the weakly confined tweezer axis.

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)•Jun 1, 2017•0 citations

Frequency Conversion: Side-band cooling, state-swapping, and coherent control of mechanical resonators

Kurt A. Jacobs, Hendra I. Nurdin, Frederick W. Strauch +1 more

Sideband cooling is a technique that potentially allows mechanical resonators to be prepared in their ground states, important for future applications in quantum technologies. Tian has recently shown that side-band cooling can be implemented by modulating the coupling between a nano-resonator and a superconducting oscillator, a process of frequency conversion [L. Tian, PRB 79, 193407 (2009)]. While side-band cooling is usually treated in the steady-state regime, the effective resonant coupling will also generate near perfect state-swapping from the superconductor to the mechanical resonator. We perform numerical simulations of this system, examining the ground-state cooling achieved by the state-swapping. Further, we show that the superconducting oscillator can be used to control the amplitude and phase of the resonator, while simultaneously cooling it, and thus act as a coherent "quantum feedback controller".

arXiv:1003.2653•Mar 12, 2010•2 citations

Raman sideband cooling of a 138Ba+ ion using a single Zeeman interval

Christopher M. Seck, Mark Kokish, Matthew Dietrich +1 more

Motional ground state cooling and internal state preparation are important elements for quantum logic spectroscopy (QLS), a class of quantum information processing. Since QLS does not require the high gate fidelities usually associated with quantum computation and quantum simulation, it is possible to make simplifying choices in ion species and quantum protocols at the expense of some fidelity. Here, we report sideband cooling and motional state detection protocols for $^{138}$Ba$^+$ of sufficient fidelity for QLS without an extremely narrowband laser or the use of a species with hyperfine structure. We use the two S$_{1/2}$ Zeeman sublevels of $^{138}$Ba$^+$ to Raman sideband cool a single ion to the motional ground state. Because of the small Zeeman splitting, near-resonant Raman sideband cooling of $^{138}$Ba$^+$ requires only the Doppler cooling lasers and two additional AOMs. Observing the near-resonant Raman optical pumping fluorescence, we estimate a final average motional quantum number $\bar{n}\approx0.17$. We additionally employ a second, far-off-resonant laser driving Raman $\pi$-pulses between the two Zeeman sublevels to provide motional state detection for QLS and to confirm the sideband cooling efficiency, measuring a final $\bar{n} = 0.15(6)$.

•Mar 30, 2016•0 citations

Using a superconducting qubit to perform sideband-cooling and measurement of a low frequency mechanical oscillator

J. J. Viennot, Xizheng Ma, Konrad W. Lehnert

Bulletin of the American Physical Society•Mar 5, 2018•0 citations

Raman sideband cooling of a Ba+138 ion using a Zeeman interval

Christopher M. Seck, Mark Kokish, Matthew Dietrich +1 more

Motional ground state cooling and internal state preparation are important elements for quantum logic spectroscopy (QLS), a class of quantum information processing. Since QLS does not require the high gate fidelities usually associated with quantum computation and quantum simulation, it is possible to make simplifying choices in ion species and quantum protocols at the expense of some fidelity. Here, we report sideband cooling and motional state detection protocols for $^{138}\mathrm{Ba}^{+}$ of sufficient fidelity for QLS without an extremely narrow-band laser or the use of a species with hyperfine structure. We use the two ${S}_{1/2}$ Zeeman sublevels of $^{138}\mathrm{Ba}^{+}$ to Raman sideband cool a single ion to the motional ground state. Because of the small Zeeman splitting, continuous near-resonant Raman sideband cooling of $^{138}\mathrm{Ba}^{+}$ requires only the Doppler cooling lasers and two additional acousto-optic modulators. Observing the near-resonant Raman optical pumping fluorescence, we extract relevant experimental parameters and demonstrate a final average motional quantum number $\overline{n}\ensuremath{\ll}1$. We additionally employ a second, far-off-resonant laser driving Raman $\ensuremath{\pi}$ pulses between the two Zeeman sublevels to provide motional state detection for QLS and to confirm the sideband cooling efficiency, measuring a final $\overline{n}=0.15(6)$.

arXiv:1603.09322•Physical Review A•May 17, 2016•10 citations
The present state of the art in cooling mechanical resonators is a version of sideband cooling. Here we present a method that uses the same configuration as sideband cooling-coupling the resonator to be cooled to a second microwave (or optical) auxiliary resonator-but will cool significantly colder. This is achieved by varying the strength of the coupling between the two resonators over a time on the order of the period of the mechanical resonator. As part of our analysis, we also obtain a method for fast, high-fidelity quantum information transfer between resonators.
Summary form only given. Complete control of individual atoms trapped in far-off resonance optical tweezers is vital for gaining a better understanding of the microscopic world. It will provide a platform with unprecedented flexibility for studying few-body physics, and might lead to new quantum technologies. By combining near-deterministic preparation of single atoms [1-3] with Zeeman-insensitive Raman sideband cooling [4], we present a push button method to prepare a single 85Rb atom in its centre of mass ground state with high fidelity. Our Raman sideband cooling scheme works efficiently in an environment with magnetic field fluctuations that were too large for other Raman sideband cooling variations [5,6]. In 2D, we achieve a fidelity for the entire loading procedure of ~0.7 for a single atom in the ground state of the optical tweezers. In 3D, the fidelity drops to 0.1 since the cooling is less efficient for the weakly confined tweezer axis.
Sideband cooling is a technique that potentially allows mechanical resonators to be prepared in their ground states, important for future applications in quantum technologies. Tian has recently shown that side-band cooling can be implemented by modulating the coupling between a nano-resonator and a superconducting oscillator, a process of frequency conversion [L. Tian, PRB 79, 193407 (2009)]. While side-band cooling is usually treated in the steady-state regime, the effective resonant coupling will also generate near perfect state-swapping from the superconductor to the mechanical resonator. We perform numerical simulations of this system, examining the ground-state cooling achieved by the state-swapping. Further, we show that the superconducting oscillator can be used to control the amplitude and phase of the resonator, while simultaneously cooling it, and thus act as a coherent "quantum feedback controller".
Motional ground state cooling and internal state preparation are important elements for quantum logic spectroscopy (QLS), a class of quantum information processing. Since QLS does not require the high gate fidelities usually associated with quantum computation and quantum simulation, it is possible to make simplifying choices in ion species and quantum protocols at the expense of some fidelity. Here, we report sideband cooling and motional state detection protocols for 138^{138}138Ba+^++ of sufficient fidelity for QLS without an extremely narrowband laser or the use of a species with hyperfine structure. We use the two S1/2_{1/2}1/2​ Zeeman sublevels of 138^{138}138Ba+^++ to Raman sideband cool a single ion to the motional ground state. Because of the small Zeeman splitting, near-resonant Raman sideband cooling of 138^{138}138Ba+^++ requires only the Doppler cooling lasers and two additional AOMs. Observing the near-resonant Raman optical pumping fluorescence, we estimate a final average motional quantum number nˉ≈0.17\bar{n}\approx0.17nˉ≈0.17. We additionally employ a second, far-off-resonant laser driving Raman π\piπ-pulses between the two Zeeman sublevels to provide motional state detection for QLS and to confirm the sideband cooling efficiency, measuring a final nˉ=0.15(6)\bar{n} = 0.15(6)nˉ=0.15(6).
Motional ground state cooling and internal state preparation are important elements for quantum logic spectroscopy (QLS), a class of quantum information processing. Since QLS does not require the high gate fidelities usually associated with quantum computation and quantum simulation, it is possible to make simplifying choices in ion species and quantum protocols at the expense of some fidelity. Here, we report sideband cooling and motional state detection protocols for 138Ba+^{138}\mathrm{Ba}^{+}138Ba+ of sufficient fidelity for QLS without an extremely narrow-band laser or the use of a species with hyperfine structure. We use the two S1/2{S}_{1/2}S1/2​ Zeeman sublevels of 138Ba+^{138}\mathrm{Ba}^{+}138Ba+ to Raman sideband cool a single ion to the motional ground state. Because of the small Zeeman splitting, continuous near-resonant Raman sideband cooling of 138Ba+^{138}\mathrm{Ba}^{+}138Ba+ requires only the Doppler cooling lasers and two additional acousto-optic modulators. Observing the near-resonant Raman optical pumping fluorescence, we extract relevant experimental parameters and demonstrate a final average motional quantum number $\overline{n}\ensuremath{\ll}1$. We additionally employ a second, far-off-resonant laser driving Raman $\ensuremath{\pi}$ pulses between the two Zeeman sublevels to provide motional state detection for QLS and to confirm the sideband cooling efficiency, measuring a final n‾=0.15(6)\overline{n}=0.15(6)n=0.15(6).