Active SU(1,1) atom interferometry
arXiv:1711.04552 · doi:10.1088/2058-9565/aa802c
Abstract
Active interferometers use amplifying elements for beam splitting and recombination. We experimentally implement such a device by using spin exchange in a Bose-Einstein condensate. The two interferometry modes are initially empty spin states that get spontaneously populated in the process of parametric amplification. This nonlinear mechanism scatters atoms into both modes in a pairwise fashion and generates a nonclassical state. Finally, a matched second period of spin exchange is performed that nonlinearly amplifies the output signal and maps the phase onto readily detectable first moments. Depending on the accumulated phase this nonlinear readout can reverse the initial dynamics and deamplify the entangled state back to empty spin states. This sequence is described in the framework of SU(1,1) mode transformations and compared to the SU(2) angular momentum description of passive interferometers.
10 pages, 6 figures; invited article for Quantum Science and Technology
References in corpus (27)
- Quantum sensing
- Quantum information with continuous variables
- Quantum metrology
- Introduction to Quantum Noise, Measurement and Amplification
- Atom Interferometers
- Measuring the scrambling of quantum information
- A Quantum Rosetta Stone for Interferometry
- Quantum Metrology with Two-Mode Squeezed Vacuum: Parity Detection Beats the Heisenberg Limit
- Measuring out-of-time-order correlators on a nuclear magnetic resonance quantum simulator
- Generating Entangled Microwave Radiation Over Two Transmission Lines
- Approaching the Heisenberg limit without single-particle detection
- Resonant control of spin dynamics in ultracold quantum gases by microwave dressing
- Quantum-Enhanced Sensing Based on Time Reversal of Nonlinear Dynamics
- Precision measurement of spin-dependent interaction strengths for spin-1 and spin-2 87Rb atoms
- Quantum state magnification
- Loschmidt Echo for quantum metrology
- Detecting large quantum Fisher information with finite measurement precision
- Pumped-up SU(1,1) interferometry
- Amplification of Fluctuations in a Spinor Bose Einstein Condensate
- Spin-mixing Interferometry with Bose-Einstein Condensates
- Parametric amplification of vacuum fluctuations in a spinor condensate
- Dynamic stabilization of a quantum many-body spin system
- Phase sensitivity bounds for two-mode interferometers
- The Classical-to-Quantum Transition with Broadband Four-Wave Mixing
- Heisenberg-limited metrology with information recycling
- Sensitivity to thermal noise of atomic Einstein-Podolsky-Rosen entanglement
- Genuine phase diffusion of a Bose-Einstein condensate in the microcanonical ensemble: A classical field study
Cited by in corpus (12)
- Quantum Simulation of Coherent Hawking-Unruh Radiation
- Non-Gaussianity as a signature of a quantum theory of gravity
- Entanglement-enhanced quantum metrology: from standard quantum limit to Heisenberg limit
- Nonlinear interferometry beyond classical limit facilitated by cyclic dynamics
- Effects of loss on the phase sensitivity with parity detection in an SU(1,1) interferometer
- Interferometric sensitivity and entanglement by scanning through quantum phase transitions in spinor Bose-Einstein condensates
- From many-body oscillations to thermalization in an isolated spinor gas
- Coherent seeding of the dynamics of a spinor Bose-Einstein condensate: from quantum to classical behavior
- Optimal atomic interferometry robust to detection noise using spin-1 atomic condensates
- Integrable active atom interferometry
- Atom-light entanglement for precise field sensing in the optical domain
- Continuous-wave solutions and modulational instability in spinor condensates of positronium