Room-temperature coherent optical manipulation of single-hole spins in solution-grown perovskite quantum dots

• URL: http://arxiv.org/abs/2208.11614v1
• Date: Wed, 24 Aug 2022 15:32:24 GMT
• Title: Room-temperature coherent optical manipulation of single-hole spins in solution-grown perovskite quantum dots
• Authors: Xuyang Lin, Yaoyao Han, Jingyi Zhu and Kaifeng Wu
• Abstract summary: Current systems either operate at very low temperatures or are difficult to scale-up. Here we report manipulation and readout of single-hole spins in an ensemble of solution-grown CsPbBr3 QDs. These operations accomplish nearly complete quantum-state control of single-hole spins at room temperature.
• Score: 3.5994174958472316
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Manipulation of solid-state spin coherence is an important paradigm for quantum information processing. Current systems either operate at very low temperatures or are difficult to scale-up. Developing low-cost, scalable materials whose spins can be coherently manipulated at room temperature is thus highly-attractive for a sustainable future of quantum information science. Here we report ambient-condition all-optical initialization, manipulation and readout of single-hole spins in an ensemble of solution-grown CsPbBr3 perovskite QDs. Single-hole spins are obtained by sub-picosecond electron scavenging following a circularly-polarized femtosecond-pulse excitation. A transversal magnetic field induces spin precession, and a second off-resonance femtosecond-pulse coherently rotates hole spins via strong light-matter interaction. These operations accomplish nearly complete quantum-state control of single-hole spins at room temperature.

Related papers

• Limits for coherent optical control of quantum emitters in layered materials [49.596352607801784]
  coherent control of a two-level system is among the most essential challenges in modern quantum optics. We use a mechanically isolated quantum emitter in hexagonal boron nitride to explore the individual mechanisms which affect the coherence of an optical transition under resonant drive. New insights on the underlying physical decoherence mechanisms reveals a limit in temperature until which coherent driving of the system is possible.
  arXiv  Detail & Related papers  (2023-12-18T10:37:06Z)
• Ground state of the $S$=1/2 pyrochlore Heisenberg antiferromagnet: A quantum spin liquid emergent from dimensional reduction [0.0]
  We show that an unconventional type of quantum spin liquid is born out from the pyrochlore system after the self-organized dimensional reduction. The stabilized quantum spin liquid exhibits an algebraic decay of correlations and vanishing excitation gap in the thermodynamic limit. This spin-liquid ground state persists in the presence of spin-orbit interactions, which expands the possibilities of realizing quantum spin liquids in real pyrochlore-structured materials.
  arXiv  Detail & Related papers  (2023-11-20T06:52:23Z)
• Control of an environmental spin defect beyond the coherence limit of a central spin [79.16635054977068]
  We present a scalable approach to increase the size of electronic-spin registers. We experimentally realize this approach to demonstrate the detection and coherent control of an unknown electronic spin outside the coherence limit of a central NV. Our work paves the way for engineering larger quantum spin registers with the potential to advance nanoscale sensing, enable correlated noise spectroscopy for error correction, and facilitate the realization of spin-chain quantum wires for quantum communication.
  arXiv  Detail & Related papers  (2023-06-29T17:55:16Z)
• A quantum coherent spin in a two-dimensional material at room temperature [2.105208778179199]
  Quantum networks and sensing require solid-state spin-photon interfaces that combine single-photon generation and long-lived spin coherence. We report quantum coherent control under ambient conditions of a single-photon emitting defect spin in a two-dimensional material.
  arXiv  Detail & Related papers  (2023-06-22T16:37:11Z)
• Quantum control of nuclear spin qubits in a rapidly rotating diamond [62.997667081978825]
  Nuclear spins in certain solids couple weakly to their environment, making them attractive candidates for quantum information processing and inertial sensing. We demonstrate optical nuclear spin polarization and rapid quantum control of nuclear spins in a diamond physically rotating at $1,$kHz, faster than the nuclear spin coherence time. Our work liberates a previously inaccessible degree of freedom of the NV nuclear spin, unlocking new approaches to quantum control and rotation sensing.
  arXiv  Detail & Related papers  (2021-07-27T03:39:36Z)
• 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)
• Spin-mechanics with nitrogen-vacancy centers and trapped particles [0.0]
  We review recent experimental work in the field of spin-mechanics that employ the interaction between trapped particles and electronic spins in the solid state. Our focus is on the theoretical background close to the current experiments, as well as on the experimental limits, that will enable these systems to unleash their full potential.
  arXiv  Detail & Related papers  (2021-04-20T20:43:24Z)
• Spin Entanglement and Magnetic Competition via Long-range Interactions in Spinor Quantum Optical Lattices [62.997667081978825]
  We study the effects of cavity mediated long range magnetic interactions and optical lattices in ultracold matter. We find that global interactions modify the underlying magnetic character of the system while introducing competition scenarios. These allow new alternatives toward the design of robust mechanisms for quantum information purposes.
  arXiv  Detail & Related papers  (2020-11-16T08:03:44Z)
• Room Temperature Coherent Control of Spin Defects in hexagonal Boron Nitride [0.0]
  Optically active defects in solids with accessible spin states are promising candidates for solid state quantum information and sensing applications. We realize coherent control of ensembles of boron vacancy centers in hexagonal boron nitride (hBN) Our results are important for employment of van der Waals materials for quantum technologies.
  arXiv  Detail & Related papers  (2020-10-23T16:31:37Z)
• Spin shuttling in a silicon double quantum dot [0.0]
  We study a minimal version of spin shuttling between two quantum dots. Spin-orbit interaction and the Zeeman effect in an inhomogeneous magnetic field play an important role for spin shuttling. We find that a spin infidelity as low as $1-F_slesssim 0.002$ with a relatively fast level velocity of $alpha = 600, mu$eV/ns is feasible.
  arXiv  Detail & Related papers  (2020-07-07T16:33:06Z)
• The limit of spin lifetime in solid-state electronic spins [77.34726150561087]
  We provide a complete first-principles picture of spin relaxation that includes up to two-phonon processes. We study a vanadium-based molecular qubit and reveal that the spin lifetime at high temperature is limited by Raman processes.
  arXiv  Detail & Related papers  (2020-04-08T14:27:36Z)

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.