Results 51 to 60 of about 110,226 (291)

Neutral atom traps. [PDF]

, 2008
This report describes progress in designing a neutral atom trap capable of trapping sub millikelvin atom in a magnetic trap and shuttling the atoms across the atom chip from a collection area to an optical cavity. The numerical simulation and atom chip design are discussed.
openaire   +2 more sources

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

FEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe, Tanmay Kumar Mohanty, Rashna Bhandari, Dorothea Fiedler   +3 more
wiley   +1 more source

Theory of an optical dipole trap for cold atoms [PDF]

, 2000
The theory of an atom dipole trap composed of a focused, far red-detuned, trapping laser beam, and a pair of red-detuned, counterpropagating, cooling beams is developed for the simplest realistic multilevel dipole interaction scheme based on a model of a
A. Ashkin, A. Hemmerich, B. M. Garraway, C. Adams, C. D. Wallace, D. Boiron, D. Boiron, D. Sesko, D. W. Sesko, H. Lee, H. Metcalf, J. D. Miller, J. Dalibard, J. P. Gordon, K. L. Corwin, M. Prentiss, P. D. Lett, R. Grimm, S. Chang, S. Chang, S. Chu, V. G. Minogin, V. G. Minogin, V. S. Letokhov, V. S. Letokhov   +24 more
core   +2 more sources

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

FEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva, Puspa Kunwar, Md Ibnul Rifat Rahman, Joanna Koryo Kwao, Nathan Lehman, Zihan Zhang, Trenton Paul, Claire Cheng, Nicholas Truex, Hui‐Ting Lee, Jun Zhang   +10 more
wiley   +1 more source

Precision measurement of the nuclear polarization in laser-cooled, optically pumped 37K

New Journal of Physics, 2016
We report a measurement of the nuclear polarization of laser-cooled, optically pumped ^37 K atoms which will allow us to precisely measure angular correlation parameters in the ${\beta }^{+}$ -decay of the same atoms.
B Fenker, J A Behr, D Melconian, R M A Anderson, M Anholm, D Ashery, R S Behling, I Cohen, I Craiciu, J M Donohue, C Farfan, D Friesen, A Gorelov, J McNeil, M Mehlman, H Norton, K Olchanski, S Smale, O Thériault, A N Vantyghem, C L Warner   +20 more
doaj   +1 more source

Trapping atoms in the vacuum field of a cavity

, 2002
The aim of this work is to find ways to trap an atom in a cavity. In contrast to other approaches we propose a method where the cavity is basically in the vacuum state and the atom in the ground state.
A. Aspect, A. Kuhn, A.B. Mundt, A.C. Doherty, A.S. Parkins, A.S. Parkins, C. Schön, C.J. Hood, C.W. Gardiner, E.T. Jaynes, G. Hechenblaikner, G.R. Guthöhrlein, J. Dalibard, J. I. Cirac, J. Ye, J. Ye, J.A. Sauer, J.I. Cirac, L. Davidovich, M. Kasevich, M.S. Feld, P. Bertet, P. Horak, P. Horak, P. Münstermann, P.W.H. Pinkse, P.W.H. Pinkse, R. Dum, S. Brattke, S. Haroche, S. van Enk, S.J. van Enk, S.J. van Enk, T. Pellizzari, T. Pellizzari   +34 more
core   +1 more source

AAA+ protein unfoldases—the Moirai of the proteome

FEBS Letters, EarlyView.
AAA+ unfoldases are essential molecular motors that power protein degradation and disaggregation. This review integrates recent cryo‐electron microscopy (cryo‐EM) structures and single‐molecule biophysical data to reconcile competing models of substrate translocation.
Stavros Azinas, Marta Carroni
wiley   +1 more source

D_{1} magic wavelength tweezers for scaling atom arrays

Physical Review Research, 2021
Efficient trapping and detection of single atoms in optical tweezers are important for realizing atom arrays, a promising platform for quantum simulation and quantum information processing.
Mohammad Mujahid Aliyu, Luheng Zhao, Xiu Quan Quek, Krishna Chaitanya Yellapragada, Huanqian Loh   +4 more
doaj   +1 more source

Dynamical quantum phase transition of a two-component Bose-Einstein condensate in an optical lattice

, 2009
We study dynamics of a two-component Bose-Einstein condensate where the two components are coupled via an optical lattice. In particular, we focus on the dynamics as one drives the system through a critical point of a first order phase transition ...
Anssi Collin, C. J. Pethick, J. Larson, Jani-Petri Martikainen, Jonas Larson, L. D. Landau, S. Sachdev   +6 more
core   +1 more source

Trapping ions and atoms optically [PDF]

Journal of Physics B: Atomic, Molecular and Optical Physics, 2017
Isolating neutral and charged particles from the environment is essential in precision experiments. For decades, this has been achieved by trapping ions with radio-frequency (rf) fields and neutral particles with optical fields. Recently, trapping of ions by interaction with light has been demonstrated.
openaire   +3 more sources