Generating non-classical states from spin coherent states via interaction with ancillary spins
arXiv:1406.6036 · doi:10.1016/j.optcom.2014.06.060
Abstract
The generation of non-classical states of large quantum systems has attracted much interest from a foundational perspective, but also because of the significant potential of such states in emerging quantum technologies. In this paper we consider the possibility of generating non-classical states of a system of spins by interaction with an ancillary system, starting from an easily prepared initial state . We extend previous results for an ancillary system comprising a single spin to bigger ancillary systems and the interaction strength is enhanced by a factor of the number of ancillary spins. Depending on initial conditions, we find -- by a combination of approximation and numerics -- that the system of spins can evolve to spin cat states, spin squeezed states or to multiple cat states. We also discuss some candidate systems for implementation of the Hamiltonian necessary to generate these non-classical states.
References in corpus (26)
- Quantum Interferometric Optical Lithography: Exploiting Entanglement to Beat The Diffraction Limit
- Quantum interface between light and atomic ensembles
- Quantum spin squeezing
- Quantum metrology with entangled coherent states
- Coherent coupling of a superconducting flux-qubit to an electron spin ensemble in diamond
- Controlled Single-Photon Emission from a Single Trapped Two-Level Atom
- Coupling Nitrogen Vacancy Centers in Diamond to Superconducting Flux Qubits
- Review of Entangled Coherent States
- Macroscopic quantum computation using Bose-Einstein condensates
- Quantum memory for microwave photons in an inhomogeneously broadened spin ensemble
- Quantum Computation with a One-Dimensional Optical Lattice
- Observation of micro-macro entanglement of light
- Displacing entanglement back and forth between the micro and macro domains
- Quantum metrology for non-linear phase shifts with entangled coherent states
- Quantum tele-amplification with a continuous variable superposition state
- Devil's crevasse and macroscopic entanglement in two-component Bose-Einstein condensates
- Classicality of spin-coherent states via entanglement and distinguishability
- Multilevel Holstein-Primakoff approximation and its application to atomic spin squeezing and ensemble quantum memories
- Collapse and Revival and Cat States with an N Spin System
- Generating Entangled Spin States for Quantum Metrology by Single-Photon Detection
- Quantum interference of a single spin excitation with a macroscopic atomic ensemble
- Dynamics of Entanglement and `Attractor' states in The Tavis-Cummings Model
- Collectively Enhanced Interactions in Solid-state Spin Qubits
- Entanglement and decoherence of N atoms and a mesoscopic field in a cavity
- Fundamental limitations in spin-ensemble quantum memories for cavity fields
- Fractional Revivals, Multiple-Cat States and Quantum Carpets in the Interaction of a Qubit with Qubits