51 citations · 407 across the 36 of their papers we have counts for
38 papers
Spin-coherent quantum designs
Marcin Rudziński, Aaron Z. Goldberg, Andrei B. Klimov +2
Coherent states bridge the gap between quantum and classical physics, but their overcomplete and nonorthogonal nature makes it difficult to identify the minimal discrete set needed…
Multiphoton interference in a single-spatial-mode quantum walk
Kate L. Fenwick, Jonathan Baker, Guillaume S. Thekkadath +6
Multiphoton interference is crucial to many photonic quantum technologies. In particular, interference forms the basis of optical quantum information processing platforms and can l…
Quadrature Coherence Scale of Linear Combinations of Gaussian Functions in Phase Space
Anaelle Hertz, Aaron Z. Goldberg, Khabat Heshami
The quadrature coherence scale (QCS) is a recently introduced measure that was shown to be an efficient witness of nonclassicality. It takes a simple form for pure and Gaussian sta…
Coherent Feed Forward Quantum Neural Network
Utkarsh Singh, Aaron Z. Goldberg, Khabat Heshami
Quantum machine learning, focusing on quantum neural networks (QNNs), remains a vastly uncharted field of study. Current QNN models primarily employ variational circuits on an ansa…
Metrological Advantages in Seeded and Lossy Nonlinear Interferometers
Jasper Kranias, Guillaume Thekkadath, Khabat Heshami +1
The quantum Fisher information (QFI) bounds the sensitivity of a quantum measurement, heralding the conditions for quantum advantages when compared with classical strategies. Here,…
Seeding Gaussian boson samplers with single photons for enhanced state generation
Valerio Crescimanna, Aaron Z. Goldberg, Khabat Heshami
Non-Gaussian quantum states are crucial to fault-tolerant quantum computation with continuous-variable systems. Usually, generation of such states involves trade-offs between succe…
Evading noise in multiparameter quantum metrology with indefinite causal order
A. Z. Goldberg, L. L. Sanchez-Soto, K. Heshami
Quantum theory allows the traversing of multiple channels in a superposition of different orders. When the order in which the channels are traversed is controlled by an auxiliary q…
Covariant operator bases for continuous variables
A. Z. Goldberg, A. B. Klimov, G. Leuchs +1
Coherent-state representations are a standard tool to deal with continuous-variable systems, as they allow one to efficiently visualize quantum states in phase space. Here, we work…
Teleamplification on the Borealis boson-sampling device
Aaron Z. Goldberg, Khabat Heshami
A recent theoretical proposal for teleamplification requires preparation of Fock states, programmable interferometers, and photon-number resolving detectors to herald the teleampli…
Quantum control of Rydberg atoms for mesoscopic-scale quantum state and circuit preparation
Valerio Crescimanna, Jacob Taylor, Aaron Z. Goldberg +1
Individually trapped Rydberg atoms show significant promise as a platform for scalable quantum simulation and for development of programmable quantum computers. In particular, the…
High-dimensional Encoding in the Round-Robin Differential-Phase-Shift Protocol
Mikka Stasiuk, Felix Hufnagel, Xiaoqin Gao +4
In quantum key distribution (QKD), protocols are tailored to adopt desirable experimental attributes, including high key rates, operation in high noise levels, and practical securi…
Measuring the quadrature coherence scale on a cloud quantum computer
Aaron Z. Goldberg, Guillaume S. Thekkadath, Khabat Heshami
Coherence underlies quantum phenomena, yet it is manifest in classical theories; delineating coherence's role is a fickle business. The quadrature coherence scale (QCS) was invente…
Efficient lineshape estimation by ghost spectroscopy
Ilaria Gianani, Luis L. Sanchez Soto, Aaron Z. Goldberg +1
Recovering the original spectral lineshapes from data obtained by instruments with extended transmission profiles is a basic tenet in spectroscopy. By using the moments of the meas…
Beyond transcoherent states: Field states for effecting optimal coherent rotations on single or multiple qubits
Aaron Z. Goldberg, Aephraim M. Steinberg, Khabat Heshami
Semiclassically, laser pulses can be used to implement arbitrary transformations on atomic systems; quantum mechanically, residual atom-field entanglement spoils this promise. Tran…
Optimal transmission estimation with dark counts
Aaron Z. Goldberg, Khabat Heshami
Transmission measurements are essential from fiber optics to spectroscopy. Quantum theory dictates that the ultimate precision in estimating transmission or loss is achieved using…
Multiparameter transmission estimation at the quantum Cramér-Rao limit on a cloud quantum computer
Aaron Z. Goldberg, Khabat Heshami
Estimating transmission or loss is at the heart of spectroscopy. To achieve the ultimate quantum resolution limit, one must use probe states with definite photon number and detecto…
Quantum Polarimetry
Aaron Z. Goldberg
Polarization is one of light's most versatile degrees of freedom for both classical and quantum applications. The ability to measure light's state of polarization and changes there…
Quantumness Beyond Entanglement: The Case of Symmetric States
Aaron Z. Goldberg, Markus Grassl, Gerd Leuchs +1
It is nowadays accepted that truly quantum correlations can exist even in the absence of entanglement. For the case of symmetric states, a physically trivial unitary transformation…
From polarization multipoles to higher-order coherences
Aaron Z. Goldberg, Andrei B. Klimov, Hubert de Guise +3
We demonstrate that the multipoles associated with the density matrix are truly observable quantities that can be unambiguously determined from intensity moments. Given their corre…
Taming singularities of the quantum Fisher information
Aaron Z. Goldberg, José L. Romero, Ángel S. Sanz +1
Quantum Fisher information matrices (QFIMs) are fundamental to estimation theory: they encode the ultimate limit for the sensitivity with which a set of parameters can be estimated…
Breaking the limits of purification: Postselection enhances heat-bath algorithmic cooling
Aaron Z. Goldberg, Khabat Heshami
Quantum technologies require pure states, which are often generated by extreme refrigeration. Heat-bath algorithmic cooling is the theoretically optimal refrigeration technique: it…
How squeezed states both maximize and minimize the same notion of quantumness
Aaron Z. Goldberg, Khabat Heshami
Beam splitters are routinely used for generating entanglement between modes in the optical and microwave domains, requiring input states that are not convex combinations of coheren…
Intrinsic Sensitivity Limits for Multiparameter Quantum Metrology
Aaron Z. Goldberg, Luis L. Sánchez-Soto, Hugo Ferretti
The quantum Cramér-Rao bound is a cornerstone of modern quantum metrology, as it provides the ultimate precision in parameter estimation. In the multiparameter scenario, this bound…
Rotation sensing at the ultimate limit
Aaron Z. Goldberg, Andrei B. Klimov, Gerd Leuchs +1
Conventional classical sensors are approaching their maximum sensitivity levels in many areas. Yet these levels still are far from the ultimate limits dictated by quantum mechanics…