Measurement-induced back-action and spin-to-polarization mapping in a quantum dot-based receiver

• URL: http://arxiv.org/abs/2503.23593v1
• Date: Sun, 30 Mar 2025 21:15:11 GMT
• Title: Measurement-induced back-action and spin-to-polarization mapping in a quantum dot-based receiver
• Authors: Adri`a Medeiros, Manuel Gund`in, Dario A. Fioretto, Vincent Vinel, Eliott Rambeau, Elham Mehdi, Niccolo Somaschi, Aristide Lemaître, Isabelle Sagnes, Nadia Belabas, Olivier Krebs, Pascale Senellart, Loïc Lanco,
• Abstract summary: Polarization-encoded spin-photon interfaces constitute promising candidates for the development of stationary nodes used as photon receivers.<n>We introduce a time-resolved tomography approach which allows observing the dynamics of an electron spin in a semiconductor quantum dot.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Polarization-encoded spin-photon interfaces constitute promising candidates for the development of stationary nodes used as photon receivers, for quantum communication and distributed quantum computing. Here we introduce a time-resolved tomography approach which allows observing the dynamics of an electron spin, in a semiconductor quantum dot, mapped onto the dynamics of the polarization state of reflected photons. Through a single tomography experiment, we infer all the relevant spin dynamics timescales, including precession, decoherence and relaxation times. We also demonstrate and quantify the measurement back-action induced, on the embedded spin qubit, by the detection of a single reflected photon. We show that the induced population and coherence of the spin state can be tuned by the chosen polarization basis of the measurement. The control of the photon-induced back-action on the embedded spin qubit constitutes a crucial requirement for the use of spin-photon interfaces as quantum receivers.

Related papers

• A Hybrid Measurement Scheme for Generating nonGaussian Spin States [0.0]
  We present a protocol for generating nonclassical states of atomic spin ensembles. We create a spin squeezed state by measuring the light's polarization rotation. We detect single photons scattered into the signal mode.
  arXiv  Detail & Related papers  (2025-02-26T19:59:39Z)
• Demonstration of Lossy Linear Transformations and Two-Photon Interference on a Photonic Chip [78.1768579844556]
  We show that engineered loss, using an auxiliary waveguide, allows one to invert the spatial statistics from bunching to antibunching. We study the photon statistics within the loss-emulating channel and observe photon coincidences, which may provide insights into the design of quantum photonic integrated chips.
  arXiv  Detail & Related papers  (2024-04-09T06:45:46Z)
• Continuous and deterministic all-photonic cluster state of indistinguishable photons [0.0]
  Cluster states are key resources for measurement-based quantum information processing. We demonstrate a semiconductor quantum dot based device in which the confined hole spin acts as a needle in a quantum knitting machine. We use polarization tomography on four sequentially detected photons to demonstrate and to directly quantify the robustness of the cluster's entanglement and the determinism in its photon generation.
  arXiv  Detail & Related papers  (2024-03-06T16:06:34Z)
• Controlling photon polarisation with a single quantum dot spin [0.0]
  We demonstrate the control of giant polarisation rotations induced by a single electron spin. We find that the polarisation state of the reflected photons can be manipulated in most of the Poincar'e sphere, through controlled spin-induced rotations. This control allows the operation of spin-photon interfaces in various configurations, including at zero or low magnetic fields.
  arXiv  Detail & Related papers  (2022-12-07T16:37:59Z)
• Energy-efficient quantum non-demolition measurement with a spin-photon interface [0.0]
  We study the potential of a SPI for quantum non demolition (QND) measurements of a spin state. We show that quantum superpositions of zero and single photon states outperform coherent pulses of light. The proposed schemes are robust against imperfections in state of the art semi-conducting devices.
  arXiv  Detail & Related papers  (2022-05-19T15:38:18Z)
• Visualizing spinon Fermi surfaces with time-dependent spectroscopy [62.997667081978825]
  We propose applying time-dependent photo-emission spectroscopy, an established tool in solid state systems, in cold atom quantum simulators. We show in exact diagonalization simulations of the one-dimensional $t-J$ model that the spinons start to populate previously unoccupied states in an effective band structure. The dependence of the spectral function on the time after the pump pulse reveals collective interactions among spinons.
  arXiv  Detail & Related papers  (2021-05-27T18:00:02Z)
• Tunable Anderson Localization of Dark States [146.2730735143614]
  We experimentally study Anderson localization in a superconducting waveguide quantum electrodynamics system. We observe an exponential suppression of the transmission coefficient in the vicinity of its subradiant dark modes. The experiment opens the door to the study of various localization phenomena on a new platform.
  arXiv  Detail & Related papers  (2021-05-25T07:52:52Z)
• 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)
• 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 Zeno effect under continuous spin noise measurement in a quantum dot-micropillar cavity [0.0]
  We describe the quantum Zeno effect in a spin-photon interface represented by a charged quantum dot in a micropillar cavity. We obtain a microscopic expression for the spin measurement rate and calculate the second and fourth order correlation functions of the spin noise. We demonstrate, that the quantum limit for the spin measurement can be reached for any probe frequency using the homodyne nondemolition spin measurement.
  arXiv  Detail & Related papers  (2020-08-14T16:07:05Z)
• Theory of waveguide-QED with moving emitters [68.8204255655161]
  We study a system composed by a waveguide and a moving quantum emitter in the single excitation subspace. We first characterize single-photon scattering off a single moving quantum emitter, showing both nonreciprocal transmission and recoil-induced reduction of the quantum emitter motional energy.
  arXiv  Detail & Related papers  (2020-03-20T12:14:10Z)

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.