High-quality poor man's Majorana bound states from cavity embedding

• URL: http://arxiv.org/abs/2407.12088v1
• Date: Tue, 16 Jul 2024 18:00:04 GMT
• Title: High-quality poor man's Majorana bound states from cavity embedding
• Authors: Álvaro Gómez-León, Marco Schirò, Olesia Dmytruk,
• Abstract summary: Poor man's Majorana Bound States arise in minimal Kitaev chains when the parameters are fine-tuned to a sweet spot. We consider an interacting two-site Kitaev chain coupled to a single-mode cavity and show that the sweet spot condition can be controlled with the cavity frequency and the hopping between sites.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Poor man's Majorana Bound States (MBS) arise in minimal Kitaev chains when the parameters are fine-tuned to a sweet spot. We consider an interacting two-site Kitaev chain coupled to a single-mode cavity and show that the sweet spot condition can be controlled with the cavity frequency and the hopping between sites. Furthermore, we demonstrate that photon-mediated effective interactions can be used to screen intrinsic interactions, improving the original quality of the MBS. We describe experimental signatures in the cavity transmission to detect their presence and quality. Our work proposes a new way to tune poor man's MBS in a quantum dot array coupled to a cavity.

Related papers

• Shortcuts to adiabaticity, unexciting backgrounds, and reflectionless potentials [45.88028371034407]
  We exploit the analogy with one-dimensional quantum mechanics, and the well known correspondence between Bogoliubov coefficients in the QHO and transmission/reflection amplitudes in scattering theory.<n>We show how STA completions can be understood in terms of the anti-squeezing operator.
  arXiv  Detail & Related papers  (2026-01-16T13:02:37Z)
• Off-resonant preservation and generation of imaginarity in distributed scenarios [9.842948533850794]
  We study the nonlocal advantage of quantum imaginarity (NAQI) and distillable imaginarity of assistance (DIA)<n>For two qubits interacting with a lossy cavity, it is shown that both the NAQI and DIA can be well preserved for long times.
  arXiv  Detail & Related papers  (2026-01-16T03:54:27Z)
• Quantum Coulomb drag signatures of Majorana bound states [6.438073920843614]
  Majorana bound states (MBSs) are key candidates for fault-tolerant quantum computation.<n>We present a theoretical study demonstrating that drag transport in a capacitively coupled double quantum dot system offers a robust and nonlocal probe of weakly coupled MBSs.
  arXiv  Detail & Related papers  (2025-12-02T04:22:21Z)
• Quantifying robustness and locality of Majorana bound states in interacting systems [2.4018837019846555]
  Topological superconductors with separated Majorana bound states (MBSs) provide a strong form of protection.<n>We show how their locality constrains their coupling to an environment.<n>This, in turn, quantifies the protection of the energy degeneracy and the feasibility of non-abelian braiding.
  arXiv  Detail & Related papers  (2025-10-23T13:25:38Z)
• 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)
• Cavity Control of Topological Qubits: Fusion Rule, Anyon Braiding and Majorana-Schrödinger Cat States [39.58317527488534]
  We investigate the impact of introducing a local cavity within the center of a topological chain. This cavity induces a scissor-like effect that bisects the chain, liberating Majorana zero modes (MZMs) within the bulk. By leveraging the symmetry properties of fermion modes within a two-site cavity, we propose a novel method for generating MZM-polariton Schr"odinger cat states.
  arXiv  Detail & Related papers  (2024-09-06T18:00:00Z)
• Quantum-dot-based Kitaev chains: Majorana quality measures and scaling with increasing chain length [0.0]
  Majorana bound states (MBSs) in short, well-controllable chains of coupled quantum dots sidesteps the problem of disorder. We introduce a new quality measure that quantifies the closeness to topological protection of finetuned MBSs in short chains. We study the local distinguishability for quantum-dot chains of different length.
  arXiv  Detail & Related papers  (2024-07-12T12:17:36Z)
• Correlating two qubits via common cavity environment [0.0]
  Generation of quantum entanglement between a pair of qubits is studied in a cavity-QED platform. Relative strength of qubit-photon couplings is crucial for establishing inter-qubit entanglement.
  arXiv  Detail & Related papers  (2024-06-13T18:53:05Z)
• Eavesdropper localization for quantum and classical channels via nonlinear scattering [58.720142291102135]
  Quantum key distribution (QKD) offers theoretical security based on the laws of physics. We present a novel approach to eavesdropper location that can be employed in quantum as well as classical channels. We demonstrate that our approach outperforms conventional OTDR in the task of localizing an evanescent outcoupling of 1% with cm precision inside standard optical fibers.
  arXiv  Detail & Related papers  (2023-06-25T21:06:27Z)
• Neural-network quantum states for ultra-cold Fermi gases [49.725105678823915]
  This work introduces a novel Pfaffian-Jastrow neural-network quantum state that includes backflow transformation based on message-passing architecture. We observe the emergence of strong pairing correlations through the opposite-spin pair distribution functions. Our findings suggest that neural-network quantum states provide a promising strategy for studying ultra-cold Fermi gases.
  arXiv  Detail & Related papers  (2023-05-15T17:46:09Z)
• Creating and detecting poor man's Majorana bound states in interacting quantum dots [0.0]
  We propose and theoretically investigate an alternative way to create the poor man's Majorana bound states (MBSs) Our proposal is based on two quantum dots (QDs) with strong electron-electron interactions that couple via a central QD with proximity-induced superconductivity. Gate control of all three QDs allows tuning the system into sweet spots with one MBS localized on each outer dot.
  arXiv  Detail & Related papers  (2022-07-13T12:45:19Z)
• Noise-resilient Edge Modes on a Chain of Superconducting Qubits [103.93329374521808]
  Inherent symmetry of a quantum system may protect its otherwise fragile states. We implement the one-dimensional kicked Ising model which exhibits non-local Majorana edge modes (MEMs) with $mathbbZ$ parity symmetry. MEMs are found to be resilient against certain symmetry-breaking noise owing to a prethermalization mechanism.
  arXiv  Detail & Related papers  (2022-04-24T22:34:15Z)
• 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)
• Effect of Emitters on Quantum State Transfer in Coupled Cavity Arrays [48.06402199083057]
  We study the effects of atoms in cavities which can absorb and emit photons as they propagate down the array. Our model is equivalent to previously examined spin chains in the one-excitation sector and in the absence of emitters.
  arXiv  Detail & Related papers  (2021-12-10T18:52:07Z)
• Attainable and usable coherence in X states over Markovian and non-Markovian channels [0.4588028371034407]
  relations between the resource theoretic measures of quantum coherence are rigorously investigated for various Markovian and non-Markovian channels. Investigation has revealed that under both dephasing and dissipative type noises the maximally entangled mixed states and Werner states lose their form and usefulness. MNMSs are established to be useful in teleporting a qubit with fidelity greater than the classical limit in the presence of dephasing noise.
  arXiv  Detail & Related papers  (2021-04-15T17:55:56Z)
• Probing the coherence of solid-state qubits at avoided crossings [51.805457601192614]
  We study the quantum dynamics of paramagnetic defects interacting with a nuclear spin bath at avoided crossings. The proposed theoretical approach paves the way to designing the coherence properties of spin qubits from first principles.
  arXiv  Detail & Related papers  (2020-10-21T15:37:59Z)
• Universal non-adiabatic control of small-gap superconducting qubits [47.187609203210705]
  We introduce a superconducting composite qubit formed from two capacitively coupled transmon qubits. We control this low-frequency CQB using solely baseband pulses, non-adiabatic transitions, and coherent Landau-Zener interference. This work demonstrates that universal non-adiabatic control of low-frequency qubits is feasible using solely baseband pulses.
  arXiv  Detail & Related papers  (2020-03-29T22:48:34Z)

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.