Atom lasers: Production, properties and prospects for precision inertial measurement

NP Robins, PA Altin, JE Debs, JD Close - Physics Reports, 2013 - Elsevier
We review experimental progress on atom lasers out-coupled from Bose–Einstein
condensates, and consider the properties of such beams in the context of precision inertial …

Squeezed-light-enhanced atom interferometry below the standard quantum limit

SS Szigeti, B Tonekaboni, WYS Lau, SN Hood… - Physical Review A, 2014 - APS
We investigate the prospect of enhancing the phase sensitivity of atom interferometers in the
Mach-Zehnder configuration with squeezed light. Ultimately, this enhancement is achieved …

Feedback-cooled Bose-Einstein condensation: Near and far from equilibrium

EP Yamaguchi, HM Hurst, IB Spielman - Physical Review A, 2023 - APS
Continuously measured interacting quantum systems almost invariably heat, causing loss of
quantum coherence. Here, we study Bose-Einstein condensates (BECs) subject to repeated …

Controlling spontaneous-emission noise in measurement-based feedback cooling of a Bose–Einstein condensate

MR Hush, SS Szigeti, ARR Carvalho… - New Journal of …, 2013 - iopscience.iop.org
Off-resonant optical imaging is a popular method for continuous monitoring of a Bose–
Einstein condensate. However, the disturbance caused by scattered photons places a …

Continuous measurement feedback control of a Bose-Einstein condensate using phase-contrast imaging

SS Szigeti, MR Hush, ARR Carvalho, JJ Hope - Physical Review A—Atomic …, 2009 - APS
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 …

Fundamental limits of feedback cooling ultracold atomic gases

Z Mehdi, SA Haine, JJ Hope, SS Szigeti - Physical Review Letters, 2024 - APS
We investigate the fundamental viability of cooling ultracold atomic gases with quantum
feedback control. Our Letter shows that the trade-off between the resolution and …

Feedback induced magnetic phases in binary Bose-Einstein condensates

HM Hurst, S Guo, IB Spielman - Physical review research, 2020 - APS
Weak measurement in tandem with real-time feedback control is a new route toward
engineering novel nonequilibrium quantum matter. Here we develop a theoretical toolbox …

Feedback control of an interacting Bose-Einstein condensate using phase-contrast imaging

SS Szigeti, MR Hush, ARR Carvalho, JJ Hope - Physical Review A—Atomic …, 2010 - APS
The linewidth of an atom laser is limited by density fluctuations in the Bose-Einstein
condensate (BEC) from which the atom laser beam is outcoupled. In this paper we show that …

Solution of inverse problem for Gross-Pitaevskii equation with artificial neural networks

SP Pokatov, TY Ivanova, DA Ivanov - Laser Physics Letters, 2023 - iopscience.iop.org
We propose an artificial neural network (ANN) design to solve the inverse problem for a 1D
Gross–Pitaevskii equation (GPE). More precise, the ANN takes the squared modulus of the …

Limitations on the control of Schrödinger equations

R Illner, H Lange, H Teismann - ESAIM: Control, Optimisation and …, 2006 - esaim-cocv.org
We give the definitions of exact and approximate controllability for linear and nonlinear
Schrödinger equations, review fundamental criteria for controllability and revisit a classical …