Zobrazeno 1 - 10
of 1 451
pro vyhledávání: '"Chapman, M. S."'
Publikováno v:
PRX QUANTUM 3, 010328 (2022)
A protocol for the creation of time-stationary squeezed states in a spin-1 Bose condensate is proposed. The method consists of a pair of controlled quenches of an external magnetic field, which allows tuning of the system Hamiltonian in the vicinity
Externí odkaz:
http://arxiv.org/abs/2109.12168
Publikováno v:
Phys. Rev. A 98, 031601 (2018)
Staircases in response functions are associated with physically observable quantities that respond discretely to continuous tuning of a control parameter. A well-known example is the quantization of the Hall conductivity in two dimensional electron g
Externí odkaz:
http://arxiv.org/abs/1804.03745
Publikováno v:
Phys. Rev. Lett. 123, 173202 (2019)
Non-Abelian and non-adiabatic variants of Berry's geometric phase have been pivotal in the recent advances in fault tolerant quantum computation gates, while Berry's phase itself is at the heart of the study of topological phases of matter. The geome
Externí odkaz:
http://arxiv.org/abs/1801.00586
Publikováno v:
Phys. Rev. Lett. 116, 155301 (2016)
We observe power-law scaling of the temporal onset of excitations with quench speed in the neighborhood of the quantum phase transition between the polar and broken-axisymmetry phases in a small spin-1 ferromagnetic Bose-Einstein condensate. As the s
Externí odkaz:
http://arxiv.org/abs/1512.06914
Spontaneous symmetry breaking occurs in a physical system whenever the ground state does not share the symmetry of the underlying theory, e.g., the Hamiltonian. It gives rise to massless Nambu-Goldstone modes and massive Anderson-Higgs modes. These m
Externí odkaz:
http://arxiv.org/abs/1512.06766
Autor:
Hoang, T. M., Anquez, M., Robbins, B. A., Yang, X. Y., Land, B. J., Hamley, C. D., Chapman, M. S.
We demonstrate a new method to coherently excite and control the quantum spin states of an atomic Bose gas using parametric excitation of the collective spin by time varying the relative strength of the Zeeman and spin-dependent collisional interacti
Externí odkaz:
http://arxiv.org/abs/1512.05645
Publikováno v:
Phys. Rev. A 92, 023615 (2015)
With current magnetic field shielding and high precision detection in dipolar spinor Bose-Einstein condensates, it is possible to experimentally detect the low or zero field nonsecular dipolar dynamics. Here we analytically investigate the zero-field
Externí odkaz:
http://arxiv.org/abs/1507.06729
Publikováno v:
Phys. Rev. A 92, 013630 (2015)
Spin exchange interaction between atoms in a spin-1 Bose-Einstein condensate causes atomic spin evolving periodically under the single spatial mode approximation in the mean field theory. By applying fast magnetic pulses according to a two-step or a
Externí odkaz:
http://arxiv.org/abs/1503.01828
Autor:
DePalatis, M. V., Chapman, M. S.
We have produced sympathetically cooled barium monohalide ions BaX$^+$ (X = F, Cl, Br) by reacting trapped, laser cooled Ba$^+$ ions with room temperature gas phase neutral halogen-containing molecules. Reaction rates for two of these (SF$_6$ and CH$
Externí odkaz:
http://arxiv.org/abs/1306.0035
We demonstrate dynamic stabilization of an unstable strongly interacting quantum many-body system by periodic manipulation of the phase of the collective states. The experiment employs a spin-1 atomic Bose condensate initialized to an unstable (hyper
Externí odkaz:
http://arxiv.org/abs/1209.4363