A hybrid-systems approach to spin squeezing using a highly dissipative ancillary system

Abstract

Squeezed states of spin systems are an important entangled resource for quantum technologies, particularly quantum metrology and sensing. Here we consider the generation of spin squeezed states by interacting the spins with a dissipative ancillary system. We show that spin squeezing can be generated in this model by two different mechanisms: one-axis twisting and driven collective relaxation. We can interpolate between the two mechanisms by simply adjusting the detuning between the dissipative ancillary system and the spin system. Interestingly, we find that for both mechanisms, ancillary system dissipation need not be considered an imperfection in our model, but plays a positive role in spin squeezing. To assess the feasibility of spin squeezing we consider two different implementations with superconducting circuits. We conclude that it is experimentally feasible to generate a squeezed state of hundreds of spins either by one-axis twisting or by driven collective relaxation.

14 + 2 pages, 9 figures; close to published version

References in corpus (17)

• Photonic quantum technologies
• QuTiP 2: A Python framework for the dynamics of open quantum systems
• Atom Interferometers
• Coupling Superconducting Qubits via a Cavity Bus
• 14-qubit entanglement: creation and coherence
• Dynamical decoupling and noise spectroscopy with a superconducting flux qubit
• Magnetic field imaging with NV ensembles
• Phonon-induced spin-spin interactions in diamond nanostructures: application to spin squeezing
• Entanglement in a second order quantum phase transition
• Spin dynamics in the optical cycle of single nitrogen-vacancy centres in diamond
• High-Resolution Magnetometry with a Spinor Bose-Einstein Condensate
• Equivalence of critical scaling laws for many-body entanglement in the Lipkin-Meshkov-Glick model
• Strong Coupling of a Quantum Oscillator to a Flux Qubit at its Symmetry Point
• Mesoscopic Entanglement Induced by Spontaneous Emission in Solid-State Quantum Optics
• Spin squeezing: transforming one-axis-twisting into two-axis-twisting
• Ultrasensitive magnetic field detection using a single artificial atom
• Quantum correlation in disordered spin systems: entanglement and applications to magnetic sensing

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