Related papers: Strong Intrinsic Longitudinal Coupling in Circuit Quantum Electrodynamics

Related papers

Cavity-assisted quantum transduction between superconducting qubits and trapped atomic particles mediated by Rydberg levels [49.1574468325115]
We present an approach for transferring quantum states from superconducting qubits to the internal states of trapped atoms or ions. For experimentally demonstrated parameters of interaction strengths, dissipation, and dephasing, our scheme achieves fidelities above 95%.
arXiv Detail & Related papers (2025-01-06T18:28:18Z)
Nonlinear dynamical Casimir effect and Unruh entanglement in waveguide QED with parametrically modulated coupling [83.88591755871734]
We study theoretically an array of two-level qubits moving relative to a one-dimensional waveguide. When the frequency of this motion approaches twice the qubit resonance frequency, it induces parametric generation of photons and excitation of the qubits. We develop a comprehensive general theoretical framework that incorporates both perturbative diagrammatic techniques and a rigorous master-equation approach.
arXiv Detail & Related papers (2024-08-30T15:54:33Z)
Spectral signature of high-order photon processes mediated by Cooper-pair pairing [0.0]
Superconducting circuits have almost exclusively operated in the regime where phase fluctuations are smaller than unity. Superconducting circuits have almost exclusively operated in the regime where phase fluctuations are smaller than unity. This work explores a new regime of high-order photon interactions in microwave quantum optics, with applications ranging from multi-photon quantum logic to the study of highly correlated microwave radiation.
arXiv Detail & Related papers (2023-12-22T21:29:25Z)
Longitudinal (curvature) couplings of an $N$-level qudit to a superconducting resonator at the adiabatic limit and beyond [0.0]
We investigate the coupling between a multi-level system, or qudit, and a superconducting (SC) resonator's electromagnetic field. For the first time, we derive Hamiltonians describing the longitudinal multi-level interactions in a general dispersive regime. We provide examples illustrating the transition from adiabatic to dispersive coupling in different qubit systems.
arXiv Detail & Related papers (2023-12-05T20:33:59Z)
Single-photon induced instabilities in a cavity electromechanical device [0.0]
nonlinear radiation-pressure interaction in Cavity-electromechanical systems could result in an unstable response of the mechanical resonator. By using polariton modes formed by a strongly coupled flux-tunable transmon and a microwave cavity, here we demonstrate an electromechanical device and achieve a single-photon coupling rate. Such an improvement in the single-photon coupling rate and the observations of microwave frequency combs at single-photon levels may have applications in the quantum control of the motional states and critical parametric sensing.
arXiv Detail & Related papers (2023-09-13T07:33:09Z)
Methods for transverse and longitudinal spin-photon coupling in silicon quantum dots with intrinsic spin-orbit effect [0.32301042014102566]
This paper examines the theory of both transverse and longitudinal spin-photon coupling. We propose a method of coupling which uses the intrinsic spin-orbit interaction arising from orbital degeneracies in SiMOS qubits. We also evaluate the feasibility of a longitudinal coupling driven by an AC modulation on the qubit.
arXiv Detail & Related papers (2023-08-24T08:04:28Z)
Collateral coupling between superconducting resonators: Fast and high fidelity generation of qudit-qudit entanglement [0.0]
Superconducting circuits are highly controllable platforms to manipulate quantum states. We show how the existence of a distance-independent interaction between microwave resonators coupled capacitively through a qubit offers a new control parameter toward this goal.
arXiv Detail & Related papers (2023-05-05T14:16:03Z)
Coupling enhancement and symmetrization of single-photon optomechanics in open quantum systems [0.76146285961466]
We study optimal reciprocal transport in symmetric optomechanics. This work may pave the way to studying the single-photon optomechanical effects with current experimental platforms.
arXiv Detail & Related papers (2023-02-09T19:01:15Z)
Resolving Fock states near the Kerr-free point of a superconducting resonator [51.03394077656548]
We have designed a tunable nonlinear resonator terminated by a SNAIL (Superconducting Asymmetric Inductive eLement) We have excited photons near this Kerr-free point and characterized the device using a transmon qubit.
arXiv Detail & Related papers (2022-10-18T09:55:58Z)
Quantum-limited millimeter wave to optical transduction [50.663540427505616]
Long distance transmission of quantum information is a central ingredient of distributed quantum information processors. Current approaches to transduction employ solid state links between electrical and optical domains. We demonstrate quantum-limited transduction of millimeter-wave (mmwave) photons into optical photons using cold $85$Rb atoms as the transducer.
arXiv Detail & Related papers (2022-07-20T18:04:26Z)
Measuring the magnon-photon coupling in shaped ferromagnets: tuning of the resonance frequency [50.591267188664666]
cavity photons and ferromagnetic spins excitations can exchange information coherently in hybrid architectures. Speed enhancement is usually achieved by optimizing the geometry of the electromagnetic cavity. We show that the geometry of the ferromagnet plays also an important role, by setting the fundamental frequency of the magnonic resonator.
arXiv Detail & Related papers (2022-07-08T11:28:31Z)
Tuning long-range fermion-mediated interactions in cold-atom quantum simulators [68.8204255655161]
Engineering long-range interactions in cold-atom quantum simulators can lead to exotic quantum many-body behavior. Here, we propose several tuning knobs, accessible in current experimental platforms, that allow to further control the range and shape of the mediated interactions.
arXiv Detail & Related papers (2022-03-31T13:32:12Z)
Unconventional Quantum Electrodynamics with Hofstadter-Ladder Waveguide [5.693517450178467]
We propose a novel quantum electrodynamics (QED) platform where quantum emitters interact with a Hofstadter-ladder waveguide. By assuming emitter's frequency to be resonant with the lower band, we find that the spontaneous emission is chiral. Due to quantum interference, we find that both the emitter-waveguide interaction and the amplitudes of bound states are periodically modulated by giant emitter's size.
arXiv Detail & Related papers (2022-03-21T07:07:26Z)
Parametric Amplification of an Optomechanical Quantum Interconnect [0.0]
Connecting superconducting qubits to optical fiber necessitates the conversion of microwave photons to optical photons. Modern experimental demonstrations exhibit strong coupling between a microwave resonator and an optical cavity mediated through phononic modes. We propose a theoretical framework for time-dependent control of the driving lasers based on the input-output formalism of quantum optics.
arXiv Detail & Related papers (2022-02-24T18:48:58Z)
Superconducting coupler with exponentially large on-off ratio [68.8204255655161]
Tunable two-qubit couplers offer an avenue to mitigate errors in multiqubit superconducting quantum processors. Most couplers operate in a narrow frequency band and target specific couplings, such as the spurious $ZZ$ interaction. We introduce a superconducting coupler that alleviates these limitations by suppressing all two-qubit interactions with an exponentially large on-off ratio.
arXiv Detail & Related papers (2021-07-21T03:03:13Z)
A low-loss ferrite circulator as a tunable chiral quantum system [108.66477491099887]
We demonstrate a low-loss waveguide circulator constructed with single-crystalline yttrium iron garnet (YIG) in a 3D cavity. We show the coherent coupling of its chiral internal modes with integrated superconducting niobium cavities. We also probe experimentally the effective non-Hermitian dynamics of this system and its effective non-reciprocal eigenmodes.
arXiv Detail & Related papers (2021-06-21T17:34:02Z)
Controlled coherent dynamics of [VO(TPP)], a prototype molecular nuclear qudit with an electronic ancilla [50.002949299918136]
We show that [VO(TPP)] (vanadyl tetraphenylporphyrinate) is a promising system suitable to implement quantum computation algorithms. It embeds an electronic spin 1/2 coupled through hyperfine interaction to a nuclear spin 7/2, both characterized by remarkable coherence.
arXiv Detail & Related papers (2021-03-15T21:38:41Z)
Quantum coherent microwave-optical transduction using high overtone bulk acoustic resonances [6.467198007912785]
A device capable of converting single quanta of the microwave field to the optical domain is an outstanding endeavour. We present a new transduction scheme that could satisfy the requirements for quantum coherent bidirectional transduction. Our scheme relies on an intermediary mechanical mode, a high overtone bulk acoustic resonance (HBAR), to coherently couple microwave and optical photons.
arXiv Detail & Related papers (2021-02-28T11:45:37Z)
Auto-heterodyne characterization of narrow-band photon pairs [68.8204255655161]
We describe a technique to measure photon pair joint spectra by detecting the time-correlation beat note when non-degenerate photon pairs interfere at a beamsplitter. The technique is well suited to characterize pairs of photons, each of which can interact with a single atomic species.
arXiv Detail & Related papers (2021-01-08T18:21:30Z)
Waveguide quantum optomechanics: parity-time phase transitions in ultrastrong coupling regime [125.99533416395765]
We show that the simplest set-up of two qubits, harmonically trapped over an optical waveguide, enables the ultrastrong coupling regime of the quantum optomechanical interaction. The combination of the inherent open nature of the system and the strong optomechanical coupling leads to emerging parity-time (PT) symmetry. The $mathcalPT$ phase transition drives long-living subradiant states, observable in the state-of-the-art waveguide QED setups.
arXiv Detail & Related papers (2020-07-04T11:02:20Z)
Waveguide Bandgap Engineering with an Array of Superconducting Qubits [101.18253437732933]
We experimentally study a metamaterial made of eight superconducting transmon qubits with local frequency control. We observe the formation of super- and subradiant states, as well as the emergence of a polaritonic bandgap. The circuit of this work extends experiments with one and two qubits towards a full-blown quantum metamaterial.
arXiv Detail & Related papers (2020-06-05T09:27:53Z)
Light-mediated strong coupling between a mechanical oscillator and atomic spins one meter apart [0.0]
We use a free-space laser beam to strongly couple a collective atomic spin and a micromechanical membrane over a distance of one meter. The coupling is highly tunable and allows the observation of normal-mode splitting, coherent energy exchange oscillations, two-mode thermal noise squeezing and dissipative coupling. Our approach to engineer coherent long-distance interactions with light makes it possible to couple very different systems in a modular way, opening up a range of opportunities for quantum control and coherent feedback networks.
arXiv Detail & Related papers (2020-04-29T18:38:26Z)

This list is automatically generated from the titles and abstracts of the papers in this site.