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

arXiv:1909.08817 · Physical Review A

Phonon-number-resolving detection of multiple local phonon modes in trapped ions

Ryutaro Ohira, Takashi Mukaiyama, Kenji Toyoda

Published Dec 5, 2019• 16 citations
arXivHTMLPDF

Abstract

We propose and demonstrate phonon-number-resolving detection of the multiple local phonon modes in a trapped-ion chain. To mitigate the effect of phonon hopping during the detection process, the probability amplitude of each local phonon mode is mapped to the auxiliary long-lived motional ground states. Sequential state-dependent fluorescence detection is then performed. In the experiment, we have successfully observed the time evolution of two local phonon modes in two ions, including the phonon-number correlation between the two modes.

DOI
10.1103/physreva.100.060301

Related papers

Blockade of phonon hopping in trapped ions in the presence of multiple local phonons

Ryutaro Ohira, Shota Kume, Kyoichi Takayama +3 more

Driving an ion at a motional sideband transition induces the Jaynes-Cummings (JC) interaction. This JC interaction creates an anharmonic ladder of JC eigenstates, resulting in the suppression of phonon hopping due to energy conservation. Here, we realize phonon blockade in the presence of multiple local phonons in a trapped-ion chain. This work constitutes a concrete study on the evolution of multiple local phonons with or without phonon blockade.

arXiv:2003.03962•Physical Review A•Jan 29, 2021•20 citations

Confinement and retrieval of local phonons in a trapped-ion chain

Ryutaro Ohira, Shota Kume, Kyoichi Takayama +3 more

Driving an ion at a motional sideband transition induces the Jaynes--Cummings (JC) interaction. This JC interaction creates an anharmonic ladder of JC eigenstates, resulting in the suppression of phonon hopping due to energy conservation. Here, we report the confinement of multiple local phonons to a single ion site using this nonlinear quantum effect. By using phonon-number-resolving detection, we observe the dynamics of multiple phonons in an ion chain. In addition to simply confining local phonons, by turning the JC interaction on and off dynamically, we can confine a single local phonon to a single ion site and subsequently retrieve it out of the site. Our work establishes a key technological component for quantum simulation with multiple bosonic particles, which can simulate classically intractable problems.

•Mar 9, 2020•1 citation

Phonon-number-resolving detection of multiple local phonon modes in trapped ions

Takashi Mukaiyama

•Jan 1, 2019•0 citations

Nonequilibrium phonon dynamics in trapped-ion systems

Tarun Dutta, Manas Mukherjee, K. Sengupta

We propose a concrete experiment to probe the nonequilibrium local dynamics of the one-dimensional Bose-Hubbard model using a trapped ion system consisting of a linear chain of few ions prepared in a state of transverse motional mode which corresponds to a fixed number of phonons per ion. These phonons are well known to be described by an effective Bose-Hubbard model. We propose a protocol which leads to a sudden local sign reversal of the on-site interaction strength of this Hubbard model at one of the sites and demonstrate that the subsequent nonequilibrium dynamics of the model can be experimentally probed by measuring the time-dependent phonon number in a specific motional state of the ions. We back our experimental proposal with exact numerical calculation of the dynamics of a Bose-Hubbard model subsequent to a local quench.

arXiv:1201.0064•Physical Review A•Jun 1, 2012•6 citations

Study of decoherence in radial local phonon hopping within trapped-ion string

Yuxuan Chen, Yuri, Takumi, Kenji Toyoda

We systematically investigate local phonon hopping in the radial direction of a linear trapped-ion string. We measure the decay of hopping as a function of key trap parameters and analyze the results in terms of the decay time and the number of oscillations. We attribute the loss of coherence to nonlinear coupling between different modes. Despite quantitative differences, the overall trends in our numerical simulations are similar to those of the experimental results. This work establishes a method for evaluating phonon hopping coherence and provides insight into the underlying decoherence mechanisms.

arXiv:2411.04765•Nov 7, 2024•0 citations

Phonon-number-resolving detection of multiple radial phonon modes with trapped ions

Yoshikazu MARUHASHI

The International Commission for Optics•May 16, 2017•0 citations
We propose and demonstrate phonon-number-resolving detection of the multiple local phonon modes in a trapped-ion chain. To mitigate the effect of phonon hopping during the detection process, the probability amplitude of each local phonon mode is mapped to the auxiliary long-lived motional ground states. Sequential state-dependent fluorescence detection is then performed. In the experiment, we have successfully observed the time evolution of two local phonon modes in two ions, including the phonon-number correlation between the two modes.
Driving an ion at a motional sideband transition induces the Jaynes--Cummings (JC) interaction. This JC interaction creates an anharmonic ladder of JC eigenstates, resulting in the suppression of phonon hopping due to energy conservation. Here, we report the confinement of multiple local phonons to a single ion site using this nonlinear quantum effect. By using phonon-number-resolving detection, we observe the dynamics of multiple phonons in an ion chain. In addition to simply confining local phonons, by turning the JC interaction on and off dynamically, we can confine a single local phonon to a single ion site and subsequently retrieve it out of the site. Our work establishes a key technological component for quantum simulation with multiple bosonic particles, which can simulate classically intractable problems.
We propose a concrete experiment to probe the nonequilibrium local dynamics of the one-dimensional Bose-Hubbard model using a trapped ion system consisting of a linear chain of few ions prepared in a state of transverse motional mode which corresponds to a fixed number of phonons per ion. These phonons are well known to be described by an effective Bose-Hubbard model. We propose a protocol which leads to a sudden local sign reversal of the on-site interaction strength of this Hubbard model at one of the sites and demonstrate that the subsequent nonequilibrium dynamics of the model can be experimentally probed by measuring the time-dependent phonon number in a specific motional state of the ions. We back our experimental proposal with exact numerical calculation of the dynamics of a Bose-Hubbard model subsequent to a local quench.
We systematically investigate local phonon hopping in the radial direction of a linear trapped-ion string. We measure the decay of hopping as a function of key trap parameters and analyze the results in terms of the decay time and the number of oscillations. We attribute the loss of coherence to nonlinear coupling between different modes. Despite quantitative differences, the overall trends in our numerical simulations are similar to those of the experimental results. This work establishes a method for evaluating phonon hopping coherence and provides insight into the underlying decoherence mechanisms.