Spin squeezing in internal bosonic Josephson junctions via enhanced shortcuts to adiabaticity

Abstract

We investigate a time-efficient and robust preparation of spin-squeezed states -- a class of states of interest for quantum-enhanced metrology -- in internal bosonic Josephson junctions with a time-dependent nonlinear coupling strength between atoms in two different hyperfine states. We treat this state-preparation problem, which had previously been addressed using shortcuts to adiabaticity (STA), using the recently proposed analytical modification of this class of quantum-control protocols that became known as the enhanced STA (eSTA) method. We characterize the state-preparation process by evaluating the time dependence of the coherent spin-squeezing and number-squeezing parameters and the target-state fidelity. We show that the state-preparation times obtained using the eSTA method compare favourably to those found in previously proposed approaches. We also demonstrate that the increased robustness of the eSTA approach -- compared to its STA counterpart -- leads to additional advantages for potential experimental realizations of strongly spin-squeezed states in bosonic Josephson junctions.

final, published version

References in corpus (30)

• Nonlinear atom interferometer surpasses classical precision limit
• Squeezing and entanglement in a Bose-Einstein condensate
• Shortcut to adiabatic passage in two and three level atoms
• Fast atomic transport without vibrational heating
• Spin squeezing, entanglement and quantum metrology with Bose-Einstein condensates
• Improving Metrology with Quantum Scrambling
• Dynamic generation of spin-squeezed states in bosonic Josephson junctions
• Improving cold-atom sensors with quantum entanglement: Prospects and challenges
• Fast generation of spin-squeezed states in bosonic Josephson junctions
• Generation of long-lived $W$ states via reservoir engineering in dissipatively coupled systems
• Shortcuts to adiabatic cat-state generation in bosonic Josephson junctions
• One-photon Solutions to Multiqubit Multimode quantum Rabi model
• Quantum Control via Enhanced Shortcuts to Adiabaticity
• Preparing Dicke states in a spin ensemble using phase estimation
• Bare-Excitation Ground State of a Spinless-Fermion -- Boson Model and $W$-State Engineering in an Array of Superconducting Qubits and Resonators
• Scalable $W$-type entanglement resource in neutral-atom arrays with Rydberg-dressed resonant dipole-dipole interaction
• Conversion from $W$ to Greenberger-Horne-Zeilinger states in the Rydberg-blockade regime of neutral-atom systems: Dynamical-symmetry-based approach
• Large array of Schrödinger cat states facilitated by an optical waveguide
• Generation of Bell, W and GHZ states via exceptional points in non-Hermitian quantum spin systems
• Dicke-state preparation through global transverse control of Ising-coupled qubits
• Scalable spin squeezing from spontaneous breaking of a continuous symmetry
• Generating Bell states and $N$-partite $W$ states of long-distance qubits in superconducting waveguide QED
• Noise Sensitivities for an Atom Shuttled by a Moving Optical Lattice via Shortcuts to Adiabaticity
• Dynamical generation of chiral $W$ and Greenberger-Horne-Zeilinger states in laser-controlled Rydberg-atom trimers
• Quantum-brachistochrone approach to the conversion from $W$ to Greenberger-Horne-Zeilinger states for Rydberg-atom qubits
• Interconversion of $W$ and Greenberger-Horne-Zeilinger states for Ising-coupled qubits with transverse global control
• Unified generation and fast emission of arbitrary single-photon multimode $W$ states
• Robustness of Enhanced Shortcuts to Adiabaticity in Lattice Transport
• Improved anharmonic trap expansion through enhanced shortcuts to adiabaticity
• Fast transport of Bose-Einstein condensates in anharmonic traps

Cited by in corpus (6)

• Shortcuts to adiabaticity: theoretical framework, relations between different methods, and versatile approximations
• Twist-and-turn dynamics of spin squeezing in bosonic Josephson junctions: Enhanced shortcuts-to-adiabaticity approach
• High fidelity control of a many-body Tonks--Girardeau gas with an effective mean-field approach
• Quantum sensing with ultracold simulators in lattice and ensemble systems: a review
• Multimode NOON-state generation with ultracold atoms via geodesic counterdiabatic driving
• Characterization and generation of a SQL-beating catlike state through repetitive measurements