Arrays of Elliptical Ion Traps for Parallel Quantum Computing

1999 ◽  
pp. 438-446
Author(s):  
Ralph G. DeVoe
Keyword(s):  
Quantum Computing ◽  
Ion Traps

scholarly journals High Stability Cryogenic System for Quantum Computing with Compact Packaged Ion Traps

2021 ◽  
pp. 1-1
Author(s):  
Robert Fulton Spivey ◽  
Ismail Volkan Inlek ◽  
Zhubing Jia ◽  
Stephen Crain ◽  
Ke Sun ◽  
...  
Keyword(s):  
Quantum Computing ◽  
High Stability ◽  
Ion Traps ◽  
Cryogenic System

Transport of quantum states and separation of ions in a dual RF ion trap

2002 ◽  
Vol 2 (4) ◽  
pp. 257-271 ◽  
Author(s):  
M.A. Rowe ◽  
A. Ben-Kish ◽  
B. DeMarco ◽  
D. Leibfried ◽  
V. Meyer ◽  
...  
Keyword(s):  
Quantum Computing ◽  
Building Block ◽  
Ion Trap ◽  
Internal State ◽  
Ion Traps ◽  
Quantum States ◽  
Unit Cell ◽  
Linear Ion Trap ◽  
Ion Dynamics ◽  
Arbitrary Quantum

We have investigated ion dynamics associated with a dual linear ion trap where ions can be stored in and moved between two distinct locations. Such a trap is a building block for a system to engineer arbitrary quantum states of ion ensembles. Specifically, this trap is the unit cell in a strategy for scalable quantum computing using a series of interconnected ion traps. We have transferred an ion between trap locations 1.2 mm apart in 50 $\mu$s with near unit efficiency ($> 10^{6}$ consecutive transfers) and negligible motional heating, while maintaining internal-state coherence. In addition, we have separated two ions held in a common trap into two distinct traps.

scholarly journals Scalable, efficient ion-photon coupling with phase Fresnel lenses for large-scale quantum computing

2009 ◽  
Vol 9 (3&4) ◽  
pp. 203-214
Author(s):  
E.W. Streed ◽  
B.G. Norton ◽  
J.J. Chapman ◽  
D. Kielpinski
Keyword(s):  
Quantum Computing ◽  
Large Scale ◽  
Large Fraction ◽  
Numerical Aperture ◽  
Fresnel Lens ◽  
Ion Traps ◽  
Propagation Mode ◽  
Fresnel Lenses ◽  
Mode Tem ◽  
Photon Coupling

Efficient ion-photon coupling is an important component for large-scale ion-trap quantum computing. We propose that arrays of phase Fresnel lenses (PFLs) are a favorable optical coupling technology to match with multi-zone ion traps. Both are scalable technologies based on conventional micro-fabrication techniques. The large numerical apertures (NAs) possible with PFLs can reduce the readout time for ion qubits. PFLs also provide good coherent ion-photon coupling by matching a large fraction of an ion's emission pattern to a single optical propagation mode (TEM$_{00}$). To this end we have optically characterized a large numerical aperture phase Fresnel lens (NA=0.64) designed for use at 369.5 nm, the principal fluorescence detection transition for Yb$^+$ ions. A diffraction-limited spot $w_0=350\pm15$ nm ($1/e^2$ waist) with mode quality $M^2= 1.08\pm0.05$ was measured with this PFL. From this we estimate the minimum expected free space coherent ion-photon coupling to be 0.64\%, which is twice the best previous experimental measurement using a conventional multi-element lens. We also evaluate two techniques for improving the entanglement fidelity between the ion state and photon polarization with large numerical aperture lenses.

Discrete variable gate-model quantum computing

2019 ◽  
Author(s):  
Mark Fingerhuth ◽  
Tomáš Babej ◽  
Peter Wittek
Keyword(s):  
Quantum Computing ◽  
Discrete Variable

The Essence of Quantum Computing

2018 ◽  
Author(s):  
Rajendra K. Bera
Keyword(s):  
Hilbert Space ◽  
Quantum Computing ◽  
Quantum Physics ◽  
Quantum Algorithms ◽  
Quantum Computers ◽  
Turing Machines ◽  
Classical Physics ◽  
Core Set ◽  
The World ◽  
Subordinate Role

It now appears that quantum computers are poised to enter the world of computing and establish its dominance, especially, in the cloud. Turing machines (classical computers) tied to the laws of classical physics will not vanish from our lives but begin to play a subordinate role to quantum computers tied to the enigmatic laws of quantum physics that deal with such non-intuitive phenomena as superposition, entanglement, collapse of the wave function, and teleportation, all occurring in Hilbert space. The aim of this 3-part paper is to introduce the readers to a core set of quantum algorithms based on the postulates of quantum mechanics, and reveal the amazing power of quantum computing.

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