Quantum memories for squeezed and coherent superpositions in a
driven-dissipative nonlinear oscillator
- URL: http://arxiv.org/abs/2309.06300v1
- Date: Tue, 12 Sep 2023 15:06:08 GMT
- Title: Quantum memories for squeezed and coherent superpositions in a
driven-dissipative nonlinear oscillator
- Authors: Adri\`a Labay-Mora, Roberta Zambrini, Gian Luca Giorgi
- Abstract summary: Superconducting circuits have been employed to realize long-lived qubits stored in coherent states.
We show that coherent superpositions of squeezed states are achievable in the presence of a strong symmetry.
We investigate the potential application of these nonlinear driven-dissipative resonators for quantum computing and quantum associative memory.
- Score: 1.03590082373586
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Quantum oscillators with nonlinear driving and dissipative terms have gained
significant attention due to their ability to stabilize cat-states for
universal quantum computation. Recently, superconducting circuits have been
employed to realize such long-lived qubits stored in coherent states. We
present a generalization of these oscillators, which are not limited to
coherent states, in the presence of different nonlinearities in driving and
dissipation, exploring different degrees. Specifically, we present an extensive
analysis of the asymptotic dynamical features and of the storage of squeezed
states. We demonstrate that coherent superpositions of squeezed states are
achievable in the presence of a strong symmetry, thereby allowing for the
storage of squeezed cat-states. In the weak symmetry regime, accounting for
linear dissipation, we investigate the potential application of these nonlinear
driven-dissipative resonators for quantum computing and quantum associative
memory and analyze the impact of squeezing on their performance.
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