Architecture for a large-scale ion-trap quantum computer

Kielpinski, David; Monroe, Christopher; Wineland, David J.

doi:10.1038/nature00784

Cited by 1,392 publications

(1,345 citation statements)

References 33 publications

Supporting

Mentioning

1,336

Contrasting

Unclassified

Order By: Relevance

“…A limitation in the number of quantum gates due to heating reduces the number of gates to a maximum of 10 2 , with current heating rates. However, this quantity is amenable to be improved by increasing the quality of the vacuum [19], or by sympathetic cooling with spectator ions [4].…”

Section: (A)] So Prl 96 250501 (2006) P H Y S I C a L R E V I E W Lmentioning

confidence: 99%

“…Following this idea, the building blocks for quantum computation have already been demonstrated in experiments with a few qubits [3]. Most of the current efforts to scale up the size of current ion quantum processors rely on the fabrication of arrays of microtraps [4], in which a large number of ions can be stored and shuttled. Even though an astonishing progress has been achieved in this direction in the last years, the scalability of this system still demands technical advances in microfabrication and trap design [5].…”

mentioning

confidence: 99%

See 1 more Smart Citation

Quantum Manipulation of Trapped Ions in Two Dimensional Coulomb Crystals

2006

View full text Add to dashboard Cite

We show that a large number of ions forming a 2D Coulomb crystal provides an almost ideal system for scalable quantum computation and quantum simulation. In particular, the coupling of the internal states to the motion of the ions transverse to the crystal plane allows one to implement two-qubit quantum gates. We analyze in detail the decoherence induced by anharmonic couplings, and show that very high gate fidelities can be achieved with current experimental setups. DOI: 10.1103/PhysRevLett.96.250501 PACS numbers: 03.67.Lx, 03.67.Pp, 42.50.Vk The search for a physical system where quantum computation is feasible is at the focus of an intense theoretical and experimental activity [1]. Ion traps are by now among the most promising candidates for a many-qubit quantum processor. In this system, qubits are stored in internal electronic states, and collective vibrational modes of the ions allow us to induce quantum gates between them [2]. Following this idea, the building blocks for quantum computation have already been demonstrated in experiments with a few qubits [3]. Most of the current efforts to scale up the size of current ion quantum processors rely on the fabrication of arrays of microtraps [4], in which a large number of ions can be stored and shuttled. Even though an astonishing progress has been achieved in this direction in the last years, the scalability of this system still demands technical advances in microfabrication and trap design [5].Penning traps provide us with an alternative trapping scheme, where a large number of ions (10 4 -10 6 ) can be confined by a potential with approximate cylindrical symmetry [6]. Axial confinement is induced by a static electric field, whereas radial confinement is a result of the rotation of the ions under an axial magnetic field. If the axial confinement is strong enough, ions arrange themselves in a triangular lattice on a single plane, which corresponds to a classical two-dimensional (2D) Wigner crystal. The appeal of this system lies on the fact that ions are naturally ordered in a 2D regular array, without the need of individual micropotentials. Furthermore, ions are separated by distances of the order of tens of microns, such that they are individually addressable by optical means [7]. Thus, ions in Penning traps may appear as ideally suited for quantum computation and quantum simulation. However, this system has never been considered for this task [8]. First, because the complicated vibrational level structure of the crystal makes it difficult to apply here schemes that require resolution of single vibrational modes. In addition to that, typical schemes usually rely on the coupling of qubits to modes in directions parallel to the crystal. In current experiments with Penning traps, Doppler cooling of ions has reached temperatures of at most 1 mK, which implies occupation numbers of 10 2 -10 3 in the in-plane vibrational modes, so that it seems not to be possible to use them for quantum operations.In this Letter we show how to circumvent these problems by ex...

show abstract

Section: (A)] So Prl 96 250501 (2006) P H Y S I C a L R E V I E W Lmentioning

confidence: 99%

mentioning

confidence: 99%

Quantum Manipulation of Trapped Ions in Two Dimensional Coulomb Crystals

2006

View full text Add to dashboard Cite

show abstract

“…The idea of segmented linear Paul traps has been proposed to realize a scalable quantum computer [26,27,14]. Typically, these trap structures are fabricated out of etched semiconductor structures [20] or gold plated insulators structured by microfabrication techniques [28].…”

Section: Optimization Of a Two-layer Microstructured Ion Trapmentioning

confidence: 99%

“…Starting with two-qubit gate operations [2,3], long lived two-qubit entanglement [4,5,6], teleportation experiments [7,8], and different sorts of multi-qubit entangled states [9,10,4,11], the record for qubit-entanglement is currently presented in a 6-qubit cat state and a 8-qubit W-state [12,13]. Future improvement is expected using the technique of segmented linear Paul traps which allow to shuttle ions from a "processor" unit to a "memory" section [14]. In such a quantum computer, strategies of quantum error correction will be critical for the successful operation.…”

Section: Introductionmentioning

confidence: 99%

Optimization of segmented linear Paul traps and transport of stored particles

Schulz

Poschinger

Singer³

et al. 2006

Fortschritte der Physik

View full text Add to dashboard Cite

Single ions held in linear Paul traps are promising candidates for a future quantum computer. Here, we discuss a two-layer microstructured segmented linear ion trap. The radial and axial potentials are obtained from numeric field simulations and the geometry of the trap is optimized. As the trap electrodes are segmented in the axial direction, the trap allows the transport of ions between different spatial regions. Starting with realistic numerically obtained axial potentials, we optimize the transport of an ion such that the motional degrees of freedom are not excited, even though the transport speed far exceeds the adiabatic regime. In our optimization we achieve a transport within roughly two oscillation periods in the axial trap potential compared to typical adiabatic transports that take of the order 10 2 oscillations. Furthermore heating due to quantum mechanical effects is estimated and suppression strategies are proposed.

show abstract

“…Extremely sub-wavelength metamaterials are also relevant to applications such as controlling spontaneous emission [27][28][29] and quantum information processing [30][31][32][33][34][35][36][37][38][39][40]. The light-matter interactions between free-space electromagnetic modes and quantum emitters are generally weak due to the small interaction cross-section of the latter.…”

Section: Introductionmentioning

confidence: 99%

Extremely Sub-Wavelength Negative Index Metamaterial

Zhang¹,

Usi²,

Khan³

et al. 2015

PIER

View full text Add to dashboard Cite

Abstract-We present an extremely sub-wavelength negative index metamaterial structure operating at radio frequency. The unit cell of the metamaterial consists of planar spiral and meandering wire structures separated by dielectric substrate. The ratio of the free space wavelength to unit cell size in the propagation direction is record breaking 1733 around the resonance frequency. The proposed metamaterial also possesses the most extreme refractive index of −109 that has been recorded to date. Underlying magnetic and electric response originate from the spiral and meandering wire, respectively. We show that the meandering wire is the key element to improve the transparency of the negative index metamaterial.

show abstract

Architecture for a large-scale ion-trap quantum computer

Cited by 1,392 publications

References 33 publications

Quantum Manipulation of Trapped Ions in Two Dimensional Coulomb Crystals

Quantum Manipulation of Trapped Ions in Two Dimensional Coulomb Crystals

Optimization of segmented linear Paul traps and transport of stored particles

Extremely Sub-Wavelength Negative Index Metamaterial

Contact Info

Product

Resources

About