# Manipulation and detection of a trapped Yb+ hyperfine qubit

@article{Olmschenk2007ManipulationAD,
title={Manipulation and detection of a trapped Yb+ hyperfine qubit},
author={Steven Matthew Olmschenk and Kelly Cooper Younge and David L. Moehring and Dzmitry Matsukevich and Peter Maunz and Christopher R. Monroe},
journal={Physical Review A},
year={2007},
volume={76},
pages={052314}
}
• Published 5 August 2007
• Physics
• Physical Review A
We demonstrate the use of trapped ytterbium ions as quantum bits for quantum information processing. We implement fast, efficient state preparation and state detection of the first-order magnetic field-insensitive hyperfine levels of $^{171}\mathrm{Yb}^{+}$, with a measured coherence time of $2.5\phantom{\rule{0.3em}{0ex}}\mathrm{s}$. The high efficiency and high fidelity of these operations is accomplished through the stabilization and frequency modulation of relevant laser sources.
348 Citations

## Figures and Tables from this paper

### Lasers for Hyperfine State Detection and Cooling of Ytterbium Ions

The purpose of this REU project was to implement a system of lasers making it possible to cool trapped ytterbium ions. The cooling cycle accessed by these lasers could also be used to read out the

### Quantum control of 88Sr+ in a miniature linear Paul trap

• Physics
• 2011
We report on the construction and characterization of an apparatus for quantum information experiments using 88Sr+ ions. A miniature linear radio-frequency (rf) Paul trap was designed and built. Trap

### A fluorescence study of single trapped Ytterbium ions for quantum information applications

Trapped ions are one of the most promising candidates for quantum information applications. We describe an experimental setup using a linear rf Paul trap for confining 171Yb+ ions, in which quantum

### Individual addressing of trapped 171Yb+ ion qubits using a microelectromechanical systems-based beam steering system

• Physics
• 2014
The ability to individually manipulate the increasing number of qubits is one of the many challenges towards scalable quantum information processing with trapped ions. Using micro-mirrors fabricated

### Proposal for generating and detecting multi-qubit GHZ states in circuit QED

• Physics
• 2009
We propose methods for the preparation and entanglement detection of multi-qubit Greenberger–Horne–Zeilinger (GHZ) states in circuit quantum electrodynamics. Using quantum trajectory simulations

### Suppression of phase decoherence in a single atomic qubit

• Physics
• 2009
Suppressing decoherence in a quantum system is of great importance for quantum information processing as well as high-precision spectroscopy. The fault-tolerance quantum computation requires the

### Coherent control for qubit state readout

• Physics
New Journal of Physics
• 2020
Short pulses from mode-locked lasers can produce background-free atomic fluorescence by allowing temporal separation of the prompt incidental scatter from the subsequent atomic emission. We use this

### High-fidelity manipulation of a qubit enabled by a manufactured nucleus

• Physics
npj Quantum Information
• 2020
The recently demonstrated trapping and laser cooling of 133 Ba + has opened the door to the use of this nearly ideal atom for quantum information processing. However, before high-fidelity qubit

### Development and implementation of an Yb+ ion trap experiment towards coherent manipulation and entanglement

Trapped ions are currently one of the most promising architectures for realising the quantum information processor. The long lived internal states are ideal for representing qubit states and, through

### Quantum control of qubits and atomic motion using ultrafast laser pulses

• Physics
• 2014
Pulsed lasers offer significant advantages over continuous wave (CW) lasers in the coherent control of qubits. Here we review the theoretical and experimental aspects of controlling the internal and

## References

SHOWING 1-10 OF 59 REFERENCES

### Near-perfect simultaneous measurement of a qubit register

• Physics
Quantum Inf. Comput.
• 2006
Improvements in readout speed and fidelity are discussed in the context of scalable quantum computation architectures.

### Speed optimized two-qubit gates with laser coherent control techniques for ion trap quantum computing.

• Physics
Physical review letters
• 2003
A new concept for a two-qubit gate operating on a pair of trapped ions based on laser coherent control techniques is proposed, which is insensitive to the temperature of the ions, works also outside the Lamb-Dicke regime, and can be orders of magnitude faster than the trap period.

### Self-learning estimation of quantum states

• Physics
• 2002
We report the experimental estimation of arbitrary qubit states using a succession of N measurements on individual qubits, where the measurement basis is changed during the estimation procedure

### Experimental Issues in Coherent Quantum-State Manipulation of Trapped Atomic Ions

• Physics
Journal of research of the National Institute of Standards and Technology
• 1998
Some experimental issues in the proposal for trappedion quantum computation by J. I. Cirac and P. Zoller (University of Innsbruck) are discussed and several possible decoherence mechanisms are examined.

### Quantum Computing with Trapped Ion Hyperfine Qubits

• Physics
Quantum Inf. Process.
• 2004
AbstractWe discuss the basic aspects of quantum information processing with trapped ions, including the principles of ion trapping, preparation and detection of hyperfine qubits, single-qubit

### Electrodynamically trapped Yb + ions for quantum information processing

• Physics
• 2006
When investigating fundamental questions related to quantum mechanics, experiments are called for where individual quantum systems can be accessed and deterministically manipulated. The interaction

### Ultrafast coherent excitation of a trapped ion qubit for fast gates and photon frequency qubits.

• Physics
Physical review letters
• 2006
This work demonstrates ultrafast coherent excitation of an atomic qubit stored in the hyperfine levels of a single trapped cadmium ion, crucial for entangling networks of remotely located trapped ions through the interference of photon frequency qubits.

### Laser cooling of trapped ytterbium ions using a four-level optical-excitation scheme.

• BellGillTamm
• Physics
Physical review. A, Atomic, molecular, and optical physics
• 1991
Forescence line shapes of the cooling transition indicate that small numbers of Yb + ions were cooled in this way to kinetic temperatures below 1 K, which is much more attractive than the 2.438 μm radiation used previously.

### Population trapping in excited Yb ions.

• Physics
Physical review letters
• 1989
Resonant laser excitation of Yb ions confined in an rf ion trap is found to result in perfect population trapping in the highly metastable $^{2}\mathrm{F}_{7/2}$ state. The lifetime of this level is

### Quantum Computations with Cold Trapped Ions.

• Physics
Physical review letters
• 1995
A quantum computer can be implemented with cold ions confined in a linear trap and interacting with laser beams, where decoherence is negligible, and the measurement can be carried out with a high efficiency.