Continuously observing a dynamically decoupled spin-1 quantum gas

Abstract

We continuously observe dynamical decoupling in a spin-1 quantum gas using a weak optical measurement of spin precession. Continuous dynamical decoupling aims to dramatically modify the character and energy spectrum of spin states to render them insensitive to parasitic fluctuations. Continuous observation measures this new spectrum in a single-preparation of the quantum gas. The measured time-series contains seven tones, which spectrogram analysis parses as splittings, coherences, and coupling strengths between the decoupled states in real-time. With this we locate a regime where a transition between two states is decoupled from magnetic field instabilities up to fourth order, complementary to the parallel work at higher fields by Trypogeorgos et al. (arXiv:1706.07876). The decoupled microscale quantum gas offers magnetic sensitivity in a tunable band, persistent over many milliseconds: the length scales, frequencies, and durations relevant to many applications, including sensing biomagnetic phenomena such as neural spike trains.

5+ pages, 4 figures, 1 table; revised citation of Trypogeorgos et al. (2017)

References in corpus (32)

• Universal dynamical decoupling of a single solid-state spin from a spin bath
• Optimized Dynamical Decoupling in a Model Quantum Memory
• Quantum Zeno subspaces
• Quantum feedback control of a superconducting qubit: Persistent Rabi oscillations
• Strong magnetic coupling between an electronic spin qubit and a mechanical resonator
• Sub-millihertz magnetic spectroscopy with a nanoscale quantum sensor
• Unification of Dynamical Decoupling and the Quantum Zeno Effect
• Quantum sensing with arbitrary frequency resolution
• Quantum Gates and Memory using Microwave Dressed States
• Resonant control of spin dynamics in ultracold quantum gases by microwave dressing
• Robust dynamical decoupling with concatenated continuous driving
• Quantum metrology with a scanning probe atom interferometer
• One-Dimensional Magnetism
• Coherence-protected Quantum Gate by Continuous Dynamical Decoupling in Diamond
• Continuous Weak Measurement and Nonlinear Dynamics in a Cold Spin Ensemble
• Quantum Phase Transitions and Continuous Observation of Spinor Dynamics in an Antiferromagnetic Condensate
• Ultrasensitive Magnetometer Using a Single Atom
• Radio-frequency magnetometry using a single electron spin
• Efficient Quantum State Estimation by Continuous Weak Measurement and Dynamical Control
• Simultaneous tracking of spin angle and amplitude beyond classical limits
• Protecting a solid-state spin from decoherence using dressed spin states
• Continuously decoupling single-qubit operations from a perturbing thermal bath of scalar bosons
• Continuous dynamical decoupling magnetometry
• Frequency-Tunable Microwave Field Detection in an Atomic Vapor Cell
• Controlling the magnetic field sensitivity of atomic clock states by microwave dressing
• Synthetic clock transitions via continuous dynamical decoupling
• General scheme for the construction of a protected qubit subspace
• Long-lived driven solid-state quantum memory
• "Magic" radio-frequency dressing for trapped atomic microwave clocks
• Magnetic tensor gradiometry using Ramsey interferometry of spinor condensates
• Magic-wavelength Faraday probe measures spin continuously and without light shifts
• Fourier transform spectroscopy of a spin-orbit coupled Bose gas

Cited by in corpus (13)

• Realization of a fractional period adiabatic superlattice
• Wide-bandwidth atomic magnetometry via instantaneous-phase retrieval
• Unconventional topology with a Rashba spin-orbit coupled quantum gas
• Fisher information of correlated stochastic processes
• Frustrated magnets without geometrical frustration in bosonic flux ladders
• Effective triangular ladders with staggered flux from spin-orbit coupling in 1D optical lattices
• Quadrupole transitions and quantum gates protected by continuous dynamic decoupling
• Effective Spin-2 Quasi-particles at Linear Dispersive Five-fold Degenerate Points with Tunable Topological Chern Numbers
• Quantum spectral analysis by continuous measurement of Landau-Zener transitions
• Decoherence reduction via continuous dynamical decoupling: Analytical study of the role of the noise spectrum
• Perpetual emulation threshold of PT-symmetric Hamiltonians
• A radiofrequency voltage-controlled current source for quantum spin manipulation
• Floquet Dynamical Decoupling at Zero Bias