A parametrically programmable delay line for microwave photons
arxiv(2024)
摘要
Delay lines capable of storing quantum information are crucial for advancing
quantum repeaters and hardware efficient quantum computers. Traditionally, they
are physically realized as extended systems that support wave propagation, such
as waveguides. But such delay lines typically provide limited control over the
propagating fields. Here, we introduce a parametrically addressed delay line
(PADL) for microwave photons that provides a high level of control over the
dynamics of stored pulses, enabling us to arbitrarily delay or even swap
pulses. By parametrically driving a three-waving mixing superconducting circuit
element that is weakly hybridized with an ensemble of resonators, we engineer a
spectral response that simulates that of a physical delay line, while providing
fast control over the delay line's properties and granting access to its
internal modes. We illustrate the main features of the PADL, operating on
pulses with energies on the order of a single photon, through a series of
experiments, which include choosing which photon echo to emit, translating
pulses in time, and swapping two pulses. We also measure the noise added to the
delay line from our parametric interactions and find that the added noise is
much less than one photon.
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