Harnessing two-photon dissipation for enhanced quantum measurement and control

• URL: http://arxiv.org/abs/2403.07744v2
• Date: Tue, 24 Sep 2024 08:47:32 GMT
• Title: Harnessing two-photon dissipation for enhanced quantum measurement and control
• Authors: Antoine Marquet, Simon Dupouy, Ulysse Réglade, Antoine Essig, Joachim Cohen, Emanuele Albertinale, Audrey Bienfait, Théau Peronnin, Sébastien Jezouin, Raphaël Lescanne, Benjamin Huard,
• Abstract summary: We present three key applications of strong two-photon dissipation for quantum measurement and control. First, we demonstrate its efficacy in overcoming limitations encountered in Wigner tomography at high photon numbers. Secondly, we showcase its potential for realizing universal gates on cat qubits, exploiting the coherent mapping between cat qubit states and superpositions of 0 and 1 photons.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Dissipation engineering offers a powerful tool for quantum technologies. Recently, new superconducting devices have achieved an engineered two-photon dissipation rate exceeding all other relevant timescales. In particular, they have proven most useful in preventing transitions between the logical states $|\pm\alpha\rangle$ of a cat qubit. Here, we present three key applications of strong two-photon dissipation for quantum measurement and control, beyond cat qubit stabilization. Firstly, we demonstrate its efficacy in overcoming limitations encountered in Wigner tomography at high photon numbers. Secondly, we showcase its potential for realizing universal gates on cat qubits, exploiting the coherent mapping between cat qubit states and superpositions of 0 and 1 photons. Finally, we harness the transient dynamics of a cat state under two-photon dissipation to prepare squeezed cat states with a squeezing factor exceeding 3.96$\pm$0.07 dB.

Related papers

• High-Coherence Kerr-cat qubit in 2D architecture [1.5626229757473267]
  Kerr-cat qubit is a bosonic qubit in which multi-photon Schrodinger cat states are stabilized. This qubit is a promising candidate to implement quantum error correction codes tailored for noise-biased qubits.
  arXiv  Detail & Related papers  (2024-04-25T15:59:01Z)
• Coupled vertical double quantum dots at single-hole occupancy [37.69303106863453]
  We control vertical double quantum dots confined in a double quantum well, silicon-germanium heterostructure. We sense individual charge transitions with a single-hole transistor. tuning the vertical double quantum dot to the (1,1) charge state confines a single hole in each quantum well beneath a single plunger gate.
  arXiv  Detail & Related papers  (2024-01-15T14:46:40Z)
• Integrated Quantum Optical Phase Sensor [48.7576911714538]
  We present a photonic integrated circuit fabricated in thin-film lithium niobate. We use the second-order nonlinearity to produce a squeezed state at the same frequency as the pump light and realize circuit control and sensing with electro-optics. We anticipate that on-chip photonic systems like this, which operate with low power and integrate all of the needed functionality on a single die, will open new opportunities for quantum optical sensing.
  arXiv  Detail & Related papers  (2022-12-19T18:46:33Z)
• Protecting the quantum interference of cat states by phase-space compression [45.82374977939355]
  Cat states with their unique phase-space interference properties are ideal candidates for understanding quantum mechanics. They are highly susceptible to photon loss, which inevitably diminishes their quantum non-Gaussian features. Here, we protect these non-Gaussian features by compressing the phase-space distribution of a cat state.
  arXiv  Detail & Related papers  (2022-12-02T16:06:40Z)
• Amplification of cascaded downconversion by reusing photons with a switchable cavity [62.997667081978825]
  We propose a scheme to amplify triplet production rates by using a fast switch and a delay loop. Our proof-of-concept device increases the rate of detected photon triplets as predicted.
  arXiv  Detail & Related papers  (2022-09-23T15:53:44Z)
• A critical Schr\"odinger cat qubit [0.0]
  In cat qubits, an engineered dissipation scheme combining two-photon drive and loss has been used to stabilize this manifold. In Kerr cat qubits, where highly-performing gates can be engineered, two-photon drive and Kerr nonlinearity cooperate to confine the system. We show that large detunings and small, but non-negligible, two-photon loss rates are fundamental to achieve optimal performance.
  arXiv  Detail & Related papers  (2022-08-09T17:44:00Z)
• 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)
• All-optical generation of deterministic squeezed Schr\"odinger-cat states [0.7643466948537707]
  This work proposes an all-optical scheme to deterministically prepare the squeezed Schr$ddotmathrmo$dinger-cat state with high speed. By controlling the driving fields in our system, the two-photon loss can be adjustable, which can accelerate the generation of squeezed Schr$ddotmathrmo$dinger-cat states.
  arXiv  Detail & Related papers  (2022-06-06T11:03:23Z)
• Generating and detecting entangled cat states in dissipatively coupled degenerate optical parametric oscillators [1.238954119278917]
  "Cat states" embody quantum coherence in an accessible way and can be harnessed for fundamental tests and quantum information tasks alike. We show that a dissipative coupling between degenerate optical parametric oscillators extends this to two-mode entangled cat states. We numerically explore the parameter regime for the successful generation of transient two-mode entangled cat states.
  arXiv  Detail & Related papers  (2021-03-30T05:46:44Z)
• A bright and fast source of coherent single photons [46.25143811066789]
  A single photon source is a key enabling technology in device-independent quantum communication. We report a single photon source with an especially high system efficiency.
  arXiv  Detail & Related papers  (2020-07-24T17:08:46Z)
• Optimal quantum phase estimation with generalized multi-component Schrodinger cat states [0.0]
  We investigate the optimal quantum phase estimation with generalized multi-component Schrodinger cat states. We show that the generalized multi-component cat states can beat the performances of the NOON and two-mode squeezed vacuum states in the presence of small loss. We propose a generation scheme of the entangled multi-component cat states with current or near-term optical technologies.
  arXiv  Detail & Related papers  (2020-03-13T13:53:55Z)

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.