Continuous measurement feedback control of a Bose-Einstein condensate using phase-contrast imaging
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Szigeti, Stuart; Hush, Michael; Carvalho, Andre; Hope, Joseph
Description
We consider the theory of feedback control of a Bose-Einstein condensate (BEC) confined in a harmonic trap under a continuous measurement constructed via nondestructive imaging. A filtering theory approach is used to derive a stochastic master equation (SME) for the system from a general Hamiltonian based upon system-bath coupling. Numerical solutions for this SME in the limit of a single atom show that the final steady-state energy is dependent upon the measurement strength, the ratio of...[Show more]
dc.contributor.author | Szigeti, Stuart | |
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dc.contributor.author | Hush, Michael | |
dc.contributor.author | Carvalho, Andre | |
dc.contributor.author | Hope, Joseph | |
dc.date.accessioned | 2015-12-07T22:18:41Z | |
dc.identifier.issn | 1050-2947 | |
dc.identifier.uri | http://hdl.handle.net/1885/18931 | |
dc.description.abstract | We consider the theory of feedback control of a Bose-Einstein condensate (BEC) confined in a harmonic trap under a continuous measurement constructed via nondestructive imaging. A filtering theory approach is used to derive a stochastic master equation (SME) for the system from a general Hamiltonian based upon system-bath coupling. Numerical solutions for this SME in the limit of a single atom show that the final steady-state energy is dependent upon the measurement strength, the ratio of photon kinetic energy to atomic kinetic energy, and the feedback strength. Simulations indicate that for a weak measurement strength, feedback can be used to overcome heating introduced by the scattering of light, thereby allowing the atom to be driven toward the ground state. | |
dc.publisher | American Physical Society | |
dc.source | Physical Review A: Atomic, Molecular and Optical Physics | |
dc.subject | Keywords: Atomic kinetics; Bose-Einstein condensates; Continuous measurements; Feedback strength; Filtering theory; Harmonic trap; Nondestructive imaging; Numerical solution; Phase-contrast imaging; Single atoms; Steady-state energies; Stochastic master equations; | |
dc.title | Continuous measurement feedback control of a Bose-Einstein condensate using phase-contrast imaging | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.identifier.citationvolume | 80 | |
dc.date.issued | 2009 | |
local.identifier.absfor | 020601 - Degenerate Quantum Gases and Atom Optics | |
local.identifier.absfor | 020604 - Quantum Optics | |
local.identifier.ariespublication | u4296190xPUB6 | |
local.type.status | Published Version | |
local.contributor.affiliation | Szigeti, Stuart, College of Physical and Mathematical Sciences, ANU | |
local.contributor.affiliation | Hush, Michael, College of Physical and Mathematical Sciences, ANU | |
local.contributor.affiliation | Carvalho, Andre, College of Physical and Mathematical Sciences, ANU | |
local.contributor.affiliation | Hope, Joseph, College of Physical and Mathematical Sciences, ANU | |
local.bibliographicCitation.startpage | 013614 | |
local.identifier.doi | 10.1103/PhysRevA.80.013614 | |
dc.date.updated | 2016-02-24T10:53:53Z | |
local.identifier.scopusID | 2-s2.0-68849115457 | |
local.identifier.thomsonID | 000268616900147 | |
Collections | ANU Research Publications |
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