Related papers: Ancilla mediated qubit readout and heralded entanglement between rare-earth dopant ions in crystals

Ancilla mediated qubit readout and heralded entanglement between rare-earth dopant ions in crystals

URL: http://arxiv.org/abs/2007.02866v2
Date: Fri, 26 Mar 2021 15:25:06 GMT
Title: Ancilla mediated qubit readout and heralded entanglement between rare-earth dopant ions in crystals
Authors: Kamanasish Debnath, Alexander Holm Kiilerich, Klaus M{\o}lmer
Abstract summary: We show how a Bayesian analysis exhausts the information about the state of the qubit from the optical signal of the ancilla ion. We extend the architecture to ions residing in two remote cavities, and we show how continuous monitoring of fluorescence signals from the two ancilla ions leads to entanglement of the qubit ions.
Score: 68.8204255655161
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Owing to their long excited state lifetimes, rare-earth ions in crystals are widely used in quantum applications. To allow optical readout of the qubit state of individual ions, we propose to dope the crystal with an additional nearby ancilla ion with a shorter radiative lifetime. We show how a Bayesian analysis exhausts the information about the state of the qubit from the optical signal of the ancilla ion. We study the effects of incoherent processes and propose ways to reduce their effect on the readout. Finally, we extend the architecture to ions residing in two remote cavities, and we show how continuous monitoring of fluorescence signals from the two ancilla ions leads to entanglement of the qubit ions.

Related papers

State-dependent control of the motional modes of trapped ions using an integrated optical lattice [0.0]
We use a single ion to map the optical potential landscape over many periods of the standing-wave field. We observe a state-dependent trap-frequency shift of $2pitimes 3.33(4)$ kHz, corresponding to a bare optical potential of $2pitimes 76.8(5)$ kHz for the electronic ground state.
arXiv Detail & Related papers (2024-11-05T17:55:35Z)
Observation of Acoustically Induced Dressed States of Rare-Earth Ions [0.2656235427539931]
Development allows for on-chip control of long-lived ions. paves the way to highly coherent hybrid quantum systems with telecom photons, acoustic phonons, and electrons.
arXiv Detail & Related papers (2023-02-01T09:12:51Z)
Dynamics of Transmon Ionization [94.70553167084388]
We numerically explore the dynamics of a driven transmon-resonator system under strong and nearly resonant measurement drives. We find clear signatures of transmon ionization where the qubit escapes out of its cosine potential.
arXiv Detail & Related papers (2022-03-21T18:00:15Z)
Trapped Ion Quantum Computing using Optical Tweezers and Electric Fields [0.0]
We propose a new architecture for trapped ion quantum computing that combines optical tweezers delivering qubit state-dependent local potentials with oscillating electric fields. Since the electric field allows for long-range qubit-qubit interactions mediated by the center-of-mass motion of the ion crystal alone, it is inherently scalable to large ion crystals.
arXiv Detail & Related papers (2021-06-14T15:16:16Z)
Evaluating states in trapped ions with local correlation between internal and motional degrees of freedom [0.0]
We propose and demonstrate a scalable scheme for the simultaneous determination of internal and motional states in trapped ions with single-site resolution. The scheme is applied to the study of polaritonic excitations in the Jaynes- Cummings Hubbard model with trapped ions.
arXiv Detail & Related papers (2021-05-11T03:48:35Z)
Trapping Ions and Atoms Optically [0.0]
Isolating neutral and charged particles from the environment is essential in precision experiments. For decades, this has been achieved by trapping ions with radio-frequency (rf) fields and neutral particles with optical fields. Recently, trapping of ions by interaction with light has been demonstrated.
arXiv Detail & Related papers (2021-05-03T20:18:44Z)
Algorithmic Ground-state Cooling of Weakly-Coupled Oscillators using Quantum Logic [52.77024349608834]
We introduce a novel algorithmic cooling protocol for transferring phonons from poorly- to efficiently-cooled modes. We demonstrate it experimentally by simultaneously bringing two motional modes of a Be$+$-Ar$13+$ mixed Coulomb crystal close to their zero-point energies. We reach the lowest temperature reported for a highly charged ion, with a residual temperature of only $Tlesssim200mathrmmu K$ in each of the two modes.
arXiv Detail & Related papers (2021-02-24T17:46:15Z)
Trapping, Shaping and Isolating of Ion Coulomb Crystals via State-selective Optical Potentials [55.41644538483948]
In conventional ion traps, the trapping potential is close to independent of the electronic state, providing confinement for ions dependent on their charge-to-mass ratio $Q/m$. Here we experimentally study optical dipole potentials for $138mathrmBa+$ ions stored within two distinctive traps operating at 532 nm and 1064 nm.
arXiv Detail & Related papers (2020-10-26T14:36:48Z)
Engineering multipartite entangled states in doubly pumped parametric down-conversion processes [68.8204255655161]
We investigate the quantum state generated by optical parametric down-conversion in a $chi(2) $ medium driven by two modes. The analysis shows the emergence of multipartite, namely 3- or 4-partite, entangled states in a subset of the modes generated by the process.
arXiv Detail & Related papers (2020-07-23T13:53:12Z)
Collective radiation from distant emitters [63.391402501241195]
We show that the spectrum of the radiated field exhibits non-Markovian features such as linewidth broadening beyond standard superradiance. We discuss a proof-of-concept implementation of our results in a superconducting circuit platform.
arXiv Detail & Related papers (2020-06-22T19:03:52Z)

This list is automatically generated from the titles and abstracts of the papers in this site.