| 1. |
- Andersson, E., et al.
(författare)
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Multimode interferometer for guided matter waves
- 2002
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Ingår i: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 88:10
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Tidskriftsartikel (refereegranskat)abstract
- Atoms can be trapped and guided with electromagnetic fields, using nanofabricated structures. We describe the fundamental features of an interferometer for guided matter waves, built of two combined Y-shaped beam splitters. We find that such a device is expected to exhibit high contrast fringes even in a multimode regime, analogous to a white light interferometer.
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| 2. |
- Bartenstein, M, et al.
(författare)
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Atoms and wires: Toward atom chips
- 2000
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Ingår i: IEEE JOURNAL OF QUANTUM ELECTRONICS. - : IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. - 0018-9197. ; 36:12, s. 1364-1377
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Tidskriftsartikel (refereegranskat)abstract
- Atoms can be trapped and guided using nanofabricated wires on surfaces, achieving the scales required by quantum information proposals. These atom chips form the basis for robust and widespread application of cold atoms ranging from atom optics to fundame
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| 3. |
- Brugger, K, et al.
(författare)
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Nanofabricated atom optics: atom chips
- 2000
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Ingår i: JOURNAL OF MODERN OPTICS. - : TAYLOR & FRANCIS LTD. - 0950-0340. ; 47:14-15, s. 2789-2809
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Tidskriftsartikel (refereegranskat)abstract
- Small tight trapping and guiding potentials can be created for neutral atoms moving microns above surfaces patterned with nanofabricated charged and current-carrying structures. Surfaces holding such structures form atom chips which, for coherent matter w
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| 4. |
- Brändas, EJ, et al.
(författare)
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Indirect Measurements and the Mirror Theorem: A Liouville Formulation of Quantum Mechanics
- 1998
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Ingår i: Irreversibility and Causality Semigroups and Rigged Hilbert Spaces. - : Springer Verlag. ; LNP 504, s. 359-376
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Tidskriftsartikel (refereegranskat)abstract
- It is argued that the indirect measurement in Quantum Mechanics can be objectively formulated via the standard mirror property of noncommuting mappings. In this Liouville like formulation the primary, zero order step, regulates that the quantum probe and
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| 5. |
- Cassettari, D, et al.
(författare)
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Beam splitter for guided atoms
- 2000
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Ingår i: PHYSICAL REVIEW LETTERS. - : AMERICAN PHYSICAL SOC. - 0031-9007. ; 85:26, s. 5483-5487
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Tidskriftsartikel (refereegranskat)abstract
- We have designed and experimentally studied a simple beam splitter for guided atoms realized with a current carrying Y-shaped wire nanofabricated on a surface (atom chip). Such a Y-configuration beam splitter has many advantages compared to conventional d
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| 6. |
- Cassettari, D, et al.
(författare)
-
Micromanipulation of neutral atoms with nanofabricated structures
- 2000
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Ingår i: APPLIED PHYSICS B-LASERS AND OPTICS. - : SPRINGER VERLAG. - 0946-2171. ; 70:5, s. 721-730
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Tidskriftsartikel (refereegranskat)abstract
- A large variety of trapping and guiding potentials can be designed by bringing cold atoms close to charged or current cal lying material objects. We describe the basic principles of constructing microscopic traps and guides and how to load atoms into them
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| 7. |
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| 8. |
- Folman, R, et al.
(författare)
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Controlling cold atoms using nanofabricated surfaces: Atom chips
- 2000
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Ingår i: PHYSICAL REVIEW LETTERS. - : AMERICAN PHYSICAL SOC. - 0031-9007. ; 84:20, s. 4749-4752
-
Tidskriftsartikel (refereegranskat)abstract
- Atoms can be trapped and guided using nanofabricated wires on surfaces, achieving the scales required by quantum information proposals. These atom chips form the basis for robust and widespread applications of cold atoms ranging from atom optics to fundam
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| 9. |
- Guo, Qinda, et al.
(författare)
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A narrow bandwidth extreme ultra-violet light source for time- and angle-resolved photoemission spectroscopy
- 2022
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Ingår i: Structural Dynamics. - : AIP Publishing. - 2329-7778. ; 9:2
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Tidskriftsartikel (refereegranskat)abstract
- Here, we present a high repetition rate, narrow bandwidth, extreme ultraviolet photon source for time- and angle-resolved photoemission spectroscopy. The narrow bandwidth pulses Δ E = 9, 14, and 18 meV for photon energies h ν = 10.8, 18.1, and 25.3 eV are generated through high harmonic generation using ultra-violet drive pulses with relatively long pulse lengths (461 fs). The high harmonic generation setup employs an annular drive beam in tight focusing geometry at a repetition rate of 250 kHz. Photon energy selection is provided by a series of selectable multilayer bandpass mirrors and thin film filters, thus avoiding any time broadening introduced by single grating monochromators. A two stage optical-parametric amplifier provides < 100 fs tunable pump pulses from 0.65 μm to 9 μm. The narrow bandwidth performance of the light source is demonstrated through angle-resolved photoemission measurements on a series of quantum materials, including high-temperature superconductor Bi-2212, WSe2, and graphene.
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| 10. |
- Haase, A, et al.
(författare)
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Trapping neutral atoms with a wirre
- 2001
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Ingår i: Physical Review A. ; 64:4
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Tidskriftsartikel (refereegranskat)abstract
- Simple and versatile traps for neutral atoms can be built using the magnetic potentials created by a current-carrying wire and a homogeneous bias field. These traps exhibit favorable scaling properties and can achieve parameters required for Bose-Einstein
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| 11. |
- Hessmo, B., et al.
(författare)
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Entangled states in interferometry
- 2002
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Ingår i: Acta Physica Polonica. A. - 0587-4246 .- 1898-794X. ; 101:1, s. 37-46
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Tidskriftsartikel (refereegranskat)abstract
- We show how some entangled quantum states can be used to improve interferometric measurements. We describe why Schrodinger-cat states are very sensitive to relative-phase shifts and why relative-phase states as described by A. Luis and L.L. Sanchez-Soto resolve the interval [0, 2pi] well. We also describe how the quantum concept of well-defined relative-phase and the classical visibility of an interference pattern are related.
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| 12. |
- Viotti, Anne-Lise, et al.
(författare)
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Soliton self-compression and spectral broadening of 1 µm femtosecond pulses in single-domain KTiOPO4
- 2019
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Ingår i: Optics InfoBase Conference Papers. - : OSA - The Optical Society. - 9781557528209
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Konferensbidrag (refereegranskat)abstract
- Efficient, diode-pumped high energy femtosecond laser systems around 1 µm based on Yb-gain media are readily commercially available. However, owing to the gain bandwidth limitations, the pulses generated in such lasers are substantially longer than the ones generated in Ti:Sapphire systems. A simple, energy-scalable pulse self-compression scheme for the pulses around 1 µm thus would be of great interest for many applications, including time-resolved pump-probe spectroscopy, high-harmonics generation, etc. The self-phase modulation during nonlinear propagation in filaments in gasses is often employed for pulse self-compression [1,2]. Such schemes typically require rather bulky setups and careful control of group velocity dispersion. Some years ago it has been shown theoretically that Raman-active molecules in gaseous form could be used for mid-infrared pulse compression [3].
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