Dynamical control of matter-wave splitting using time-dependent optical lattices

Park, Sung Jong; Andersen, H. K.; Mai, Sune; Arlt, Jan J.; Sherson, Jacob

doi:10.1103/physreva.85.033626

Cited by 14 publications

(14 citation statements)

References 31 publications

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“…Quantitatively, we obtain t 3 = 3.0 ms for q max ∼ 4k R in good agreement with the experimental result and therefore interpret the reflection of the wave packet as a Bragg reflection on the gap between the second and the third band (six-photon Raman process). A calculation of the Landau-Zener tunnelling probability confirms this, since it is essentially zero at s = 16 [27].…”

Section: The Experimental Creation Of Quasi-free Wave Packetsmentioning

confidence: 69%

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The pump–probe coupling of matter wave packets to remote lattice states

Sherson¹,

Park²,

Pedersen³

et al. 2012

New J. Phys.

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The coherent manipulation of wave packets is an important tool in many areas of physics. We demonstrate the experimental realization of quasifree wave packets of ultra-cold atoms bound by an external harmonic trap. The wave packets are produced by modulating the intensity of an optical lattice containing a Bose-Einstein condensate. The evolution of these wave packets is monitored in situ and their six-photon reflection at a band gap is observed. In direct analogy with pump-probe spectroscopy, a probe pulse allows for the resonant de-excitation of the wave packet into states localized around selected lattice sites at a long, controllable distance of more than 100 lattice sites from the main component. This precise control mechanism for ultra-cold atoms thus enables controlled quantum state preparation and splitting for quantum dynamics, metrology and simulation.

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Section: The Experimental Creation Of Quasi-free Wave Packetsmentioning

confidence: 69%

“…The wave packets subsequently exchange their initial kinetic energy for potential energy by moving outward in the harmonic potential while rolling down the appropriate bands. When the first significant band gap is encountered, their direction is reversed due to a high-order Bragg reflection [27].…”

Section: The Experimental Creation Of Quasi-free Wave Packetsmentioning

confidence: 99%

The pump–probe coupling of matter wave packets to remote lattice states

Sherson¹,

Park²,

Pedersen³

et al. 2012

New J. Phys.

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“…These systems have been used in spin-exchange interactions [13], exact control of the atomic number distribution using the interaction blockade mechanism [14] and a promising platform for investigating frustrated geometries [15]. Similar to the work performed in [16], here we employ Bloch oscillations as a driving force for particles, highlighting the potential for arbitrary generation and coherent control of quantum states in a one-dimensional superlattice structure.…”

Section: Introductionmentioning

confidence: 98%

Manipulating matter waves in an optical superlattice

Reid¹,

Moreno-Cardoner²,

Sherson

et al. 2016

Phys. Rev. A

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We investigate the potential for controlling a non-interacting Bose-Einstein condensate loaded into a one-dimensional optical superlattice. Our control strategy combines Bloch oscillations, originating from accelerating the lattice, with time-dependent control of the superlattice parameters. We investigate two experimentally viable scenarios, very low and very high potential depths, in order to gain a better understanding of matter wave control available within the system. Multiple lattice parameters and a versatile energy band structure allow us to obtain a wide range of control over energy band populations. Finally, we consider several examples of quantum state preparation in the superlattice structure that may be difficult to achieve in a regular lattice.

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“…The experimental apparatus used to produce BECs has been described in detail previously [22]. Briefly, 87 Rb atoms are initially captured in a magneto-optical trap and transported into a Ioffe-Pritchard-type magnetic trap where they are cooled by radio-frequency (RF) evaporation.…”

mentioning

confidence: 99%

Observation of Atom Number Fluctuations in a Bose-Einstein Condensate

et al. 2019

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Fluctuations are a key property of both classical and quantum systems. While the fluctuations are well understood for many quantum systems at zero temperature, the case of an interacting quantum system at finite temperature still poses numerous challenges. Despite intense theoretical investigations of atom number fluctuations in Bose-Einstein condensates, their amplitude in experimentally relevant interacting systems is still not fully understood. Moreover, technical limitations have prevented their experimental investigation to date. Here we report the observation of these fluctuations. Our experiments are based on a stabilization technique, which allows for the preparation of ultracold thermal clouds at the shot noise level, thereby eliminating numerous technical noise sources. Furthermore, we make use of the correlations established by the evaporative cooling process to precisely determine the fluctuations and the sample temperature. This allows us to observe a telltale signature: the sudden increase in fluctuations of the condensate atom number close to the critical temperature. arXiv:1812.03064v2 [cond-mat.quant-gas]

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Dynamical control of matter-wave splitting using time-dependent optical lattices

Cited by 14 publications

References 31 publications

The pump–probe coupling of matter wave packets to remote lattice states

The pump–probe coupling of matter wave packets to remote lattice states

Manipulating matter waves in an optical superlattice

Observation of Atom Number Fluctuations in a Bose-Einstein Condensate

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