Giulia Ferrini
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View article: Women for quantum—manifesto of values
Women for quantum—manifesto of values Open
Data show that the presence of women in quantum science is affected by a number of detriments and their percentage decreases even further for higher positions. Beyond data, from our shared personal experiences as female tenured quantum phy…
View article: Classical simulation and quantum resource theory of non-Gaussian optics
Classical simulation and quantum resource theory of non-Gaussian optics Open
We propose efficient algorithms for classically simulating Gaussian unitaries and measurements applied to non-Gaussian initial states. The constructions are based on decomposing the non-Gaussian states into linear combinations of Gaussian …
View article: Equivalence of continuous- and discrete-variable gate-based quantum computers with finite energy
Equivalence of continuous- and discrete-variable gate-based quantum computers with finite energy Open
We examine the ability of gate-based continuous-variable quantum computers to outperform qubit or discrete-variable quantum computers. Gate-based continuous-variable operations refer to operations constructed using a polynomial sequence of…
View article: Multimode rotationally symmetric bosonic codes from group-theoretic construction
Multimode rotationally symmetric bosonic codes from group-theoretic construction Open
We introduce a new family of multi-mode, rotationally symmetric bosonic codes inspired by the group-theoretic framework of [Phys. Rev. Lett. 133, 240603 (2024)]. Such a construction inverts the traditional paradigm of code design by identi…
View article: Towards fault-tolerant quantum computation with universal continuous-variable gates
Towards fault-tolerant quantum computation with universal continuous-variable gates Open
Continuous-variable (CV) systems have shown remarkable potential for quantum computation, particularly excelling in scalability and error correction through bosonic encoding. Within this framework, the foundational notion of computational …
View article: Classical Simulation of Circuits with Realistic Odd-Dimensional Gottesman-Kitaev-Preskill States
Classical Simulation of Circuits with Realistic Odd-Dimensional Gottesman-Kitaev-Preskill States Open
Classically simulating circuits with bosonic codes is challenging due to the prohibitive cost of simulating quantum systems with many, possibly infinite, energy levels. We propose an algorithm to simulate circuits with encoded Gottesman-Ki…
View article: Bridging Magic and Non-Gaussian Resources via Gottesman-Kitaev-Preskill Encoding
Bridging Magic and Non-Gaussian Resources via Gottesman-Kitaev-Preskill Encoding Open
Although the similarity between nonstabilizer states—also known as magic states—in discrete-variable systems and non-Gaussian states in continuous-variable systems has widely been recognized, the precise connections between these two notio…
View article: Classical simulation of circuits with realistic odd-dimensional Gottesman-Kitaev-Preskill states
Classical simulation of circuits with realistic odd-dimensional Gottesman-Kitaev-Preskill states Open
Classically simulating circuits with bosonic codes is challenging due to the prohibitive cost of simulating quantum systems with many, possibly infinite, energy levels. We propose an algorithm to simulate circuits with encoded Gottesman-Ki…
View article: Assessing non-Gaussian quantum state conversion with the stellar rank
Assessing non-Gaussian quantum state conversion with the stellar rank Open
State conversion is a fundamental task in quantum information processing. Quantum resource theories allow to analyze and bound conversions that use restricted sets of operations. In the context of continuous-variable systems, state convers…
View article: Study of noise in virtual distillation circuits for quantum error mitigation
Study of noise in virtual distillation circuits for quantum error mitigation Open
Virtual distillation has been proposed as an error mitigation protocol for estimating the expectation values of observables in quantum algorithms. It proceeds by creating a cyclic permutation of noisy copies of a quantum state using a seq…
View article: Bridging magic and non-Gaussian resources via Gottesman-Kitaev-Preskill encoding
Bridging magic and non-Gaussian resources via Gottesman-Kitaev-Preskill encoding Open
Although the similarity between non-stabilizer states -- also known as magic states -- in discrete-variable systems and non-Gaussian states in continuous-variable systems has widely been recognized, the precise connections between these tw…
View article: Sufficient Condition for Universal Quantum Computation Using Bosonic Circuits
Sufficient Condition for Universal Quantum Computation Using Bosonic Circuits Open
Continuous-variable bosonic systems stand as prominent candidates for implementing quantum computational tasks. While various necessary criteria have been established to assess their resourcefulness, sufficient conditions have remained elu…
View article: Classical simulation and quantum resource theory of non-Gaussian optics
Classical simulation and quantum resource theory of non-Gaussian optics Open
We propose efficient algorithms for classically simulating Gaussian unitaries and measurements applied to non-Gaussian initial states. The constructions are based on decomposing the non-Gaussian states into linear combinations of Gaussian …
View article: Lecture notes on quantum computing
Lecture notes on quantum computing Open
These are the lecture notes of the master's course "Quantum Computing", taught at Chalmers University of Technology every fall since 2020, with participation of students from RWTH Aachen and Delft University of Technology. The aim of this …
View article: Hybrid Quantum-Classical Heuristic to Solve Large-Scale Integer Linear Programs
Hybrid Quantum-Classical Heuristic to Solve Large-Scale Integer Linear Programs Open
We present a method that integrates any quantum algorithm capable of finding solutions to integer linear programs into the branch-and-price algorithm, which is regularly used to solve large-scale integer linear programs with a specific str…
View article: Sufficient condition for universal quantum computation using bosonic circuits
Sufficient condition for universal quantum computation using bosonic circuits Open
Continuous-variable bosonic systems stand as prominent candidates for implementing quantum computational tasks. While various necessary criteria have been established to assess their resourcefulness, sufficient conditions have remained elu…
View article: Erratum: Quantifying Qubit Magic Resource with Gottesman-Kitaev-Preskill Encoding [Phys. Rev. Lett. <b>128</b>, 210502 (2022)]
Erratum: Quantifying Qubit Magic Resource with Gottesman-Kitaev-Preskill Encoding [Phys. Rev. Lett. <b>128</b>, 210502 (2022)] Open
This corrects the article DOI: 10.1103/PhysRevLett.128.210502.
View article: Gaussian conversion protocol for heralded generation of generalized Gottesman-Kitaev-Preskill states
Gaussian conversion protocol for heralded generation of generalized Gottesman-Kitaev-Preskill states Open
In the field of fault-tolerant quantum computing, continuous-variable systems can be utilized to protect quantum information from noise through the use of bosonic codes. These codes map qubit-type quantum information onto the larger bosoni…
View article: Vacuum provides quantum advantage to otherwise simulatable architectures
Vacuum provides quantum advantage to otherwise simulatable architectures Open
We consider a computational model composed of ideal Gottesman-Kitaev-Preskill stabilizer states, Gaussian operations - including all rational symplectic operations and all real displacements -, and homodyne measurement. We prove that such …
View article: Quantum Approximate Optimization Algorithm with Cat Qubits
Quantum Approximate Optimization Algorithm with Cat Qubits Open
The Quantum Approximate Optimization Algorithm (QAOA) -- one of the leading algorithms for applications on intermediate-scale quantum processors -- is designed to provide approximate solutions to combinatorial optimization problems with sh…
View article: Gaussian conversion protocol for heralded generation of qunaught states
Gaussian conversion protocol for heralded generation of qunaught states Open
In the field of fault-tolerant quantum computing, continuous-variable systems can be utilized to protect quantum information from noise through the use of bosonic codes. These codes map qubit-type quantum information onto the larger bosoni…
View article: How Do Luxury Brands Utilize NFTs to Enhance Their Brand Image?
How Do Luxury Brands Utilize NFTs to Enhance Their Brand Image? Open
Non-fungible tokens (NFTs) have witnessed unprecedented dynamism over the recent years with only few luxury brands experimenting with the technology albeit the very personal characteristics of NFT ownership. Little is known about how luxur…
View article: Efficient simulation of Gottesman-Kitaev-Preskill states with Gaussian circuits
Efficient simulation of Gottesman-Kitaev-Preskill states with Gaussian circuits Open
We study the classical simulatability of Gottesman-Kitaev-Preskill (GKP) states in combination with arbitrary displacements, a large set of symplectic operations and homodyne measurements. For these types of circuits, neither continuous-va…
View article: Study of noise in virtual distillation circuits for quantum error mitigation
Study of noise in virtual distillation circuits for quantum error mitigation Open
Virtual distillation has been proposed as an error mitigation protocol for estimating the expectation values of observables in quantum algorithms. It proceeds by creating a cyclic permutation of $M$ noisy copies of a quantum state using a …
View article: Robust Preparation of Wigner-Negative States with Optimized SNAP-Displacement Sequences
Robust Preparation of Wigner-Negative States with Optimized SNAP-Displacement Sequences Open
Hosting nonclassical states of light in three-dimensional microwave cavities has emerged as a promising paradigm for continuous-variable quantum information processing. Here we experimentally demonstrate high-fidelity generation of a range…
View article: Deterministic Gaussian conversion protocols for non-Gaussian single-mode resources
Deterministic Gaussian conversion protocols for non-Gaussian single-mode resources Open
In the context of quantum technologies over continuous variables, Gaussian states and operations are typically regarded as freely available, as they are relatively easily accessible experimentally. In contrast, the generation of non-Gaussi…
View article: Quantifying Qubit Magic Resource with Gottesman-Kitaev-Preskill Encoding
Quantifying Qubit Magic Resource with Gottesman-Kitaev-Preskill Encoding Open
Quantum resource theories are a powerful framework to characterize and\nquantify relevant quantum phenomena and identify processes that optimize their\nuse for different tasks. Here, we define a resource measure for magic, the\nsought-afte…
View article: The vacuum provides quantum advantage to otherwise simulatable architectures
The vacuum provides quantum advantage to otherwise simulatable architectures Open
We consider a computational model composed of ideal Gottesman-Kitaev-Preskill stabilizer states, Gaussian operations - including all rational symplectic operations and all real displacements -, and homodyne measurement. We prove that such …
View article: Performance of Teleportation-Based Error-Correction Circuits for Bosonic Codes with Noisy Measurements
Performance of Teleportation-Based Error-Correction Circuits for Bosonic Codes with Noisy Measurements Open
Bosonic quantum error-correcting codes offer a viable direction towards reducing the hardware over-head required for fault-tolerant quantum information processing. A broad class of bosonic codes, namely rotation-symmetric codes, can be cha…
View article: Efficient simulation of Gottesman-Kitaev-Preskill states with Gaussian circuits
Efficient simulation of Gottesman-Kitaev-Preskill states with Gaussian circuits Open
We study the classical simulatability of Gottesman-Kitaev-Preskill (GKP) states in combination with arbitrary displacements, a large set of symplectic operations and homodyne measurements. For these types of circuits, neither continuous-va…