Spectral signature of high-order photon processes mediated by Cooper-pair pairing

• URL: http://arxiv.org/abs/2312.15075v1
• Date: Fri, 22 Dec 2023 21:29:25 GMT
• Title: Spectral signature of high-order photon processes mediated by Cooper-pair pairing
• Authors: W. C. Smith, A. Borgognoni, M. Villiers, E. Roverc'h, J. Palomo, M. R. Delbecq, T. Kontos, P. Campagne-Ibarcq, B. Dou\c{c}ot, Z. Leghtas
• Abstract summary: 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.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Inducing interactions between individual photons is essential for applications in photonic quantum information processing and fundamental research on many-body photon states. A field that is well suited to combine strong interactions and low losses is microwave quantum optics with superconducting circuits. Photons are typically stored in an $LC$ circuit, and interactions appear when the circuit is shunted by a Josephson tunnel junction. Importantly, the zero-point fluctuations of the superconducting phase across the junction control the strength and order of the induced interactions. Superconducting circuits have almost exclusively operated in the regime where phase fluctuations are smaller than unity, and two-photon interactions, known as the Kerr effect, dominate. In this experiment, we shunt a high-impedance $LC$ oscillator by a dipole that only allows pairs of Cooper pairs to tunnel. Phase fluctuations, which are effectively doubled by this pairing, reach the value of 3.4. In this regime of extreme fluctuations, we observe transition frequencies that shift non-monotonically as we climb the anharmonic ladder. From this spectroscopic measurement, we extract two-, three- and four-photon interaction energies of comparable amplitude, and all exceeding the photon loss rate. 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.

Related papers

• Harnessing spontaneous emission of correlated photon pairs from ladder-type giant atoms [5.498509152557573]
  We show that a ladder-type three-level giant atom spontaneously emits strongly correlated photon pairs with high efficiency. By encoding local phases into the optimal coupling sequence, directional two-photon correlated transfer can be achieved. Such correlated photon pairs have great potential applications for quantum information processing.
  arXiv  Detail & Related papers  (2024-06-18T09:03:00Z)
• Continuous microwave photon counting by semiconductor-superconductor hybrids [0.19791587637442667]
  We present a continuous microwave photon counter based on superconducting cavity-coupled semiconductor quantum dots. The device detects both single and multiple-photon absorption events independently, thanks to the energy tunability of a two-level double-dot absorber.
  arXiv  Detail & Related papers  (2024-01-12T15:07:26Z)
• Strong coupling between a single photon and a photon pair [43.14346227009377]
  We report an experimental observation of the strong coupling between a single photon and a photon pair in an ultrastrongly-coupled circuit-QED system. Results represent a key step towards a new regime of quantum nonlinear optics.
  arXiv  Detail & Related papers  (2024-01-05T10:23:14Z)
• Quantum vortices of strongly interacting photons [52.131490211964014]
  Vortices are hallmark of nontrivial dynamics in nonlinear physics. We report on the realization of quantum vortices resulting from a strong photon-photon interaction in a quantum nonlinear optical medium. For three photons, the formation of vortex lines and a central vortex ring attests to a genuine three-photon interaction.
  arXiv  Detail & Related papers  (2023-02-12T18:11:04Z)
• Probing many-body correlations using quantum-cascade correlation spectroscopy [0.0]
  The radiative quantum cascade, i.e. the consecutive emission of photons from a ladder of energy levels, is of fundamental importance in quantum optics. Here, we use exciton polaritons to explore the cascaded emission of photons in the regime where individual transitions of the ladder are not resolved. Remarkably, the measured photon-photon correlations exhibit a strong dependence on the polariton energy, and therefore on the underlying polaritonic interaction strength.
  arXiv  Detail & Related papers  (2022-12-18T09:51:12Z)
• 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)
• Tunable photon-mediated interactions between spin-1 systems [68.8204255655161]
  We show how to harness multi-level emitters with several optical transitions to engineer photon-mediated interactions between effective spin-1 systems. Our results expand the quantum simulation toolbox available in cavity QED and quantum nanophotonic setups.
  arXiv  Detail & Related papers  (2022-06-03T14:52:34Z)
• Fully tunable longitudinal spin-photon interactions in Si and Ge quantum dots [0.0]
  We show that large longitudinal interactions emerge naturally in state-of-the-art hole spin qubits. We propose realistic protocols to measure these interactions and to implement fast and high-fidelity two-qubit entangling gates.
  arXiv  Detail & Related papers  (2022-03-31T16:36:53Z)
• Waveguide quantum electrodynamics: collective radiance and photon-photon correlations [151.77380156599398]
  Quantum electrodynamics deals with the interaction of photons propagating in a waveguide with localized quantum emitters. We focus on guided photons and ordered arrays, leading to super- and sub-radiant states, bound photon states and quantum correlations with promising quantum information applications.
  arXiv  Detail & Related papers  (2021-03-11T17:49:52Z)
• Quantum Borrmann effect for dissipation-immune photon-photon correlations [137.6408511310322]
  We study theoretically the second-order correlation function $g(2)(t)$ for photons transmitted through a periodic Bragg-spaced array of superconducting qubits, coupled to a waveguide. We demonstrate that photon bunching and anti-bunching persist much longer than both radiative and non-radiative lifetimes of a single qubit.
  arXiv  Detail & Related papers  (2020-09-29T14:37:04Z)

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

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.