Coherent adiabatic transport of atoms in radio-frequency traps

Morgan, Tadhg; O’Sullivan, Brian; Busch, Thomas

doi:10.1103/physreva.83.053620

Cited by 18 publications

(14 citation statements)

References 26 publications

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“…14). Additionally, as discussed in [89], time-dependent trapping frequencies can be considered to compensate for the time-dependent energy shifts that the non-linear interaction produces in each well. In the context of the three-mode Hamiltonian, the SAP sequence has also been discussed in a cyclic triple well potential [130].…”

Section: Bose-einstein Condensatesmentioning

confidence: 99%

See 1 more Smart Citation

Spatial adiabatic passage: a review of recent progress

Menchon-Enrich¹,

Benseny²,

Ahufinger³

et al. 2016

Rep. Prog. Phys.

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Adiabatic techniques are known to allow for engineering quantum states with high fidelity. This requirement is currently of large interest, as applications in quantum information require the preparation and manipulation of quantum states with minimal errors. Here we review recent progress on developing techniques for the preparation of spatial states through adiabatic passage, particularly focusing on three state systems. These techniques can be applied to matter waves in external potentials, such as cold atoms or electrons, and to classical waves in waveguides, such as light or sound. CONTENTS

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Section: Bose-einstein Condensatesmentioning

confidence: 99%

“…Moving the traps can be achieved by changing the individual rf frequencies that are associated with each trap. An exact sequence that allows to realize the SAP transfer was given in [89], where it was also shown that high transfer fidelities can be achieved without the need for any additional compensation potentials.…”

Section: Radio-frequency Trapsmentioning

confidence: 99%

Spatial adiabatic passage: a review of recent progress

Menchon-Enrich¹,

Benseny²,

Ahufinger³

et al. 2016

Rep. Prog. Phys.

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“…E.g., the signal depends on the position of atoms through the resonance condition for the dressing frequency. In a system with multiple rf fields [3,28,29] the signal gives information about the spatial distribution of the atoms [30]. Methods based on either the Voigt or Faraday effect can be readily implemented in dressed atom experiments to provide low-noise detection with little additional overhead.…”

Section: Introductionmentioning

confidence: 99%

Dispersive detection of radio-frequency-dressed states

et al. 2018

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We introduce a method to dispersively detect alkali-metal atoms in radio-frequency-dressed states. In particular, we use dressed detection to measure populations and population differences of atoms prepared in their clock states. Linear birefringence of the atomic medium enables atom number detection via polarization homodyning, a form of common path interferometry. In order to achieve low technical noise levels, we perform optical sideband detection after adiabatic transformation of bare states into dressed states. The balanced homodyne signal then oscillates independently of field fluctuations at twice the dressing frequency, thus allowing for robust, phase-locked detection that circumvents low-frequency noise. Using probe pulses of two optical frequencies, we can detect both clock states simultaneously and obtain population difference as well as the total atom number. The scheme also allows for difference measurements by direct subtraction of the homodyne signals at the balanced detector, which should technically enable quantum noise limited measurements with prospects for the preparation of spin squeezed states. The method extends to other Zeeman sublevels and can be employed in a range of atomic clock schemes, atom interferometers, and other experiments using dressed atoms.

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“…A single electron in a TQD can be directly transferred between outer dots by adiabatic passage via a dark state (DS) without ever populating other instantaneous eigenstates of the system . Such techniques, known as coherent transfer by adiabatic passage (CTAP), have been extended to more complicated architectures in solid state devices as well as in cold atoms . Other proposals consider the level detuning as a control parameter to transfer a qubit state .…”

Section: Introductionmentioning

confidence: 99%

Spin Entangled State Transfer in Quantum Dot Arrays: Coherent Adiabatic and Speed‐Up Protocols

2019

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Long‐distance transfer of quantum states is an indispensable part of large‐scale quantum information processing. A novel scheme for the transfer of two‐electron entangled states from one edge of a quantum dot array to the other by coherent adiabatic passage is proposed. This protocol is mediated by pulsed tunneling barriers. In a second step, a speed up is sought for by shortcut to adiabaticity techniques. This significantly reduces the operation time and, thus, minimizes the impact of decoherence. For typical parameters of state‐of‐the‐art solid state devices, the accelerated protocol has an operation time in the nanosecond range and terminates before a major coherence loss sets in. The scheme represents a promising candidate for entanglement transfer in solid state quantum information processing.

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Coherent adiabatic transport of atoms in radio-frequency traps

Cited by 18 publications

References 26 publications

Spatial adiabatic passage: a review of recent progress

Spatial adiabatic passage: a review of recent progress

Dispersive detection of radio-frequency-dressed states

Spin Entangled State Transfer in Quantum Dot Arrays: Coherent Adiabatic and Speed‐Up Protocols

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