1157 papers
This paper analytically derives the average maximum teleportation fidelities for four types of binary tree quantum repeater networks using Werner state models, revealing that the directed symmetric binary tree offers the most advantageous topology for distributed quantum teleportation and identifying specific parameter ranges where these networks achieve a quantum advantage.
This paper derives analytical bounds for the secret key generation rates of BB84 and measurement-device-independent quantum key distribution protocols using discrete phase randomization, offering a computationally efficient alternative to numerical optimization methods while maintaining accuracy in practical regions of interest.
This paper demonstrates that -paraparticles in one-dimensional Luttinger models exhibit flavor-charge separation and can be bosonized under specific conditions, offering a theoretical pathway to detect these exotic quasiparticles through distinct dispersion profiles in low-temperature systems.
This paper derives a fundamental, model-independent inequality that limits the detectability of vacuum excitations in finite-size local detectors based on a trade-off between vacuum insensitivity and excitation sensitivity, offering a potential experimental test for the axioms of algebraic quantum field theory.
This paper establishes that the uniqueness of quantum state purifications up to local unitary transformations is mathematically equivalent to Haag duality (), demonstrating that this uniqueness can fail in infinite-dimensional systems even when local tomography is possible.
QDFlow is an open-source Python package that simulates realistic quantum dot device data with ground-truth labels by combining a self-consistent Thomas-Fermi solver, dynamic capacitance modeling, and customizable noise modules to address the scarcity of experimental datasets needed for machine learning applications.
This paper derives analytical or semi-analytical bounds on finite-size secret-key rates for discrete-modulation continuous-variable quantum key distribution under Gaussian attacks by computing Petz-Rényi and sandwiched Rényi conditional entropies, offering tighter estimates for short block sizes compared to existing methods.
This paper revisits the pseudomode formalism for open quantum systems to investigate design subtleties, demonstrating how non-diagonalizable couplings generate unique spectral densities, revealing significant freedom in parameter construction, challenging convergence assumptions for evenly distributed modes, and connecting the concept to scattering theory.
This paper introduces and characterizes entanglement sharing schemes (ESS) for distributing quantum correlations among subsystems under known and unknown partner scenarios, providing complete access structure classifications for stabilizer states, conjectures for general states, and an application to resolve open problems in time-sensitive quantum network entanglement distribution.
This paper presents a general framework for extending quantum low-density parity-check (LDPC) codes from qubits to qudits, demonstrating the construction and decoding of several novel, hardware-compatible qudit LDPC codes that leverage the inherent advantages of higher-dimensional quantum systems for scalable error correction.
This paper demonstrates that Newtonian gravity can generate quantum entanglement between mesoscopic bodies only when the gravitational tidal field is quantized (as in the mini-superspace framework), whereas models treating the field as classical (semiclassical and stochastic gravity) fail to produce such entanglement.
This paper rigorously proves that the adiabatic theorem remains valid for diagonalizable non-Hermitian quantum systems with real eigenvalues by employing the complex geometric phase, biorthogonal functional calculus, and the Grönwall inequality, thereby justifying the definition of a complex Berry phase in such systems.
This paper establishes the integrability of a family of SYK models with uniform -body interactions by deriving their exact spectra and demonstrating that their underlying R-matrix corresponds to that of the critical transverse-field Ising chain, thereby revealing a profound connection between quantum chaos and statistical mechanics.
This paper establishes a unified fractional calculus framework for open quantum dynamics that rigorously embeds fractional master equations within the broader hierarchy of memory-kernel models, ensuring complete positivity through Bochner–Phillips subordination while providing a compact, analytically tractable surrogate for non-Markovian effects ranging from algebraic relaxation to coherence backflow.
This paper demonstrates channel-selective frequency up-conversion from telecom to visible wavelengths using second-order nonlinearity in a cavity, enabling reconfigurable switching and Bell-state measurements for frequency-multiplexed quantum networks.
This paper extends the Harrow-Hassidim-Lloyd (HHL) algorithm to qutrits by introducing Weyl-Heisenberg gadgets and a practical implementation scheme, demonstrating that the qutrit version achieves comparable precision with fewer qudits and a similar number of two-qudit gates compared to the traditional qubit-based approach.
This paper proposes a rigorous architectural blueprint for scaling quantum networks to continental distances using phase-stable vacuum beam guides informed by Advanced LIGO's interferometric stability, demonstrating through cross-domain benchmarking that no fundamental technical barriers exist to its implementation.
This paper explores the use of multipartite entanglement resources and four-dimensional qudits to efficiently implement distributed fan-out operations and global Mølmer-Sørensen gates, offering insights for future quantum circuit compilation and data center design.
This paper presents an open-source, hardware-faithful simulation framework built on SeQUeNCe that models heterogeneous quantum networks combining Ytterbium atoms and superconducting qubits to analyze rate-fidelity trade-offs and identify unique system bottlenecks.
This paper utilizes parameter estimation theory to quantify the classical and quantum precision limits for resolving the separation of closely spaced, non-interacting dipole sources in high-numerical-aperture microscopy, demonstrating that while the vectorial nature of emission complicates the analysis, appropriate polarization filtering combined with image inversion interferometry can still saturate the quantum Fisher information bound.