Quantum logic via optimal control in holographic dipole traps

Dorner, U.; Calarco, Tommaso; Zoller, P.; Browaeys, Antoine; Grangier, Philippe

doi:10.1088/1464-4266/7/10/020

Cited by 28 publications

(33 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We conclude that in our case, the choice of variables that decouple the essential optimization parameters [41,42] and a well suited initial guess function are helpful and maybe critical for the success of the optimal control method.…”

Section: Overview Of the Applied Optimization Strategiesmentioning

confidence: 90%

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

Section: Overview Of the Applied Optimization Strategiesmentioning

confidence: 90%

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

show abstract

“…Likewise, optimal control helped to implement highfidelity quantum gates such as two-qubit gates with neutral atoms in dipole traps [447,448], on atom chips [449], or with Rydberg atoms [450,451], two-qubit gates between ions [452], between an ion and an atom [453], error-correcting qubit gates of electron and nuclear spins within single NV centers [454], or entangling gates between distant NV centers [296]. For superconducting qubits [455], two-qubit gates were optimized, starting from Cooper pair boxes [456][457][458][459] to modern transmonbased schemes [117,460].…”

Section: State Of the Artmentioning

confidence: 99%

Training Schrödinger’s cat: quantum optimal control

et al. 2015

View full text Add to dashboard Cite

Abstract. It is control that turns scientific knowledge into useful technology: in physics and engineering it provides a systematic way for driving a dynamical system from a given initial state into a desired target state with minimized expenditure of energy and resources. As one of the cornerstones for enabling quantum technologies, optimal quantum control keeps evolving and expanding into areas as diverse as quantumenhanced sensing, manipulation of single spins, photons, or atoms, optical spectroscopy, photochemistry, magnetic resonance (spectroscopy as well as medical imaging), quantum information processing and quantum simulation. In this communication, state-of-the-art quantum control techniques are reviewed and put into perspective by a consortium of experts in optimal control theory and applications to spectroscopy, imaging, as well as quantum dynamics of closed and open systems. We address key challenges and sketch a roadmap for future developments. ForewordThe authors of this paper represent the QUAINT consortium, a European Coordination Action on Optimal Control of Quantum Systems, funded by the European Commission Framework Programme 7, Future Emerging Technologies FET-OPEN programme and the Virtual Facility for Quantum Control (VF-QC). This consortium has considerable expertise in optimal control theory and its applications to quantum systems, both in existing areas, such as spectroscopy and imaging, and in emerging quantum technologies, such as quantum information processing, quantum communication, quantum simulation a e-mail: fwm@lusi.uni-sb.de and quantum sensing. The list of challenges for quantum control has been gathered by a broad poll of leading researchers across the communities of general and mathematical control theory, atomic, molecular-, and chemical physics, electron and nuclear magnetic resonance spectroscopy, as well as medical imaging, quantum information, communication and simulation. 144 experts in these fields have provided feedback and specific input on the state of the art, mid-term and long-term goals. Those have been summarized in this document, which can be viewed as a perspectives paper, providing a roadmap for the future development of quantum control. Because such an endeavour can hardly ever be complete (there are many additional areas of quantum control applications, such as spintronics, nano-optomechanical technologies etc.), this roadmap

show abstract

“…tive to realize quantum logic operations between few cold neutral atoms or ions [5,12]. In the case of atoms or ions, the design of large numerical aperture optics requires to take into account the ultra-high vacuum environment that is necessary to produce and manipulate them.…”

Section: Introductionmentioning

confidence: 99%

Diffraction-limited optics for single-atom manipulation

et al. 2007

View full text Add to dashboard Cite

We present an optical system designed to capture and observe a single neutral atom in an optical dipole trap, created by focussing a laser beam using a large numerical aperture (N.A. = 0.5) aspheric lens. We experimentally evaluate the performance of the optical system and show that it is diffraction limited over a broad spectral range (∼ 200 nm) with a large transverse field (±25 µm). The optical tweezer created at the focal point of the lens is able to trap single atoms of 87 Rb and to detect them individually with a large collection efficiency. We measure the oscillation frequency of the atom in the dipole trap, and use this value as an independent determination of the waist of the optical tweezer. Finally, we produce with the same lens two dipole traps separated by 2.2 µm and show that the imaging system can resolve the two atoms.

show abstract

Quantum logic via optimal control in holographic dipole traps

Cited by 28 publications

References 29 publications

Optimization of segmented linear Paul traps and transport of stored particles

Optimization of segmented linear Paul traps and transport of stored particles

Training Schrödinger’s cat: quantum optimal control

Diffraction-limited optics for single-atom manipulation

Contact Info

Product

Resources

About