Publications related to Ancilla bit

Optimizing Quantum Compilers: Efficient and Effective Algorithms

Quantum computing has made significant progress in recent years, with Google and IBM releasing quantum computers with 72 and 50 qubits, respectively. Google has also achieved quantum supremacy with its 54-qubit device, and IBM has announced the release of ...

EPFL2023

Phonon-Assisted Luminescence in Defect Centers from Many-Body Perturbation Theory

Nicola Marzari, Francesco Libbi

Phonon-assisted luminescence is a key property of defect centers in semiconductors, and can be measured to perform the readout of the information stored in a quantum bit, or to detect temperature variations. The investigation of phonon-assisted luminescenc ...

AMER PHYSICAL SOC2022

Novel materials and algorithms for quantum technologies

Francesco Libbi

The enormous advancements in the ability to detect and manipulate single quantum states have lead to the emerging field of quantum technologies. Among these, quantum computation is the most far-reaching and challenging, aiming to solve problems that the cl ...

EPFL2022

Bell Diagonal and Werner State Generation: Entanglement, Non-Locality, Steering and Discord on the IBM Quantum Computer

Nicolas Macris, Su Yeon Chang, Marc-André Dupertuis, Chun Lam Chan, Samuel Bosch, Nicolas Schwaller, Frédéric Gessler

We propose the first correct special-purpose quantum circuits for preparation of Bell diagonal states (BDS), and implement them on the IBM Quantum computer, characterizing and testing complex aspects of their quantum correlations in the full parameter spac ...

2021

Exploring optically active defects in wide-bandgap materials using fluorescence microscopy

Evgenii Glushkov

Defects in solid-state systems can be both detrimental, deteriorating the quality of materials, or desired, thanks to the novel functionality they bring. Optically active point defects, producing fluorescent light, are a great example of the latter. Natura ...

EPFL2021

Cryogenic CMOS Circuits and Systems: Challenges and Opportunities in Designing the Electronic Interface for Quantum Processors

Edoardo Charbon, Fabio Sebastiano

Quantum computing could potentially offer faster solutions for some of today's classically intractable problems using quantum processors as computational support for quantum algorithms [1]. Quantum processors, in the most frequent embodiment, comprise an a ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2021

Cryogenic CMOS Integrated Circuits for Scalable Readout of Silicon Quantum Computers

Andrea Ruffino

Quantum computing promises to revolutionize our lives, achieving unprecedented computational powers and unlocking new possibilities in drug discovery, chemical simulations and cryptography. The fundamental unit of computation of a quantum computer is the q ...

EPFL2021

A Wideband Low-Power Cryogenic CMOS Circulator for Quantum Applications

Edoardo Charbon, Andrea Ruffino, Yatao Peng, Fabio Sebastiano

Quantum computers require classical electronics to ensure fault-tolerant operation. To address compactness and scalability, it was proposed to implement such electronics as integrated circuits operating at cryogenic temperatures close to those at which qua ...

2020

Designing a DDS-Based SoC for High-Fidelity Multi-Qubit Control

Edoardo Charbon, Fabio Sebastiano

The design of a large-scale quantum computer requires co-optimization of both the quantum bits (qubits) and their control electronics. This work presents the first systematic design of such a controller to simultaneously and accurately manipulate the state ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2020

Efficient Quantum Algorithms for GHZ and W States, and Implementation on the IBM Quantum Computer

Nicolas Macris, Clément Christian Javerzac-Galy, Marc-André Dupertuis, Kenichi Komagata, Chun Lam Chan, Fabien Gremion, Jarla Thiesbrummel, Romain Fournier

Efficient deterministic algorithms are proposed with logarithmic step complexities for the generation of entangled GHZ(N) and W-N states useful for quantum networks, and an implementation on the IBM quantum computer up to N = 16 is demonstrated. Improved q ...

WILEY2019

Benefits and Challenges of Designing Cryogenic CMOS RF Circuits for Quantum Computers

Edoardo Charbon, Harald Arjan Robert Homulle, Fabio Sebastiano

Accurate and low-noise generation and amplification of microwave signals are required for the manipulation and readout of quantum bits (qubits). A fault-tolerant quantum computer operates at deep cryogenic temperatures (i.e.,

IEEE2019

SPINE (SPIN Emulator) - A Quantum-Electronics Interface Simulator

Edoardo Charbon, Fabio Sebastiano

A quantum computer comprises a quantum processor and the associated control electronics used to manipulate the qubits at the core of a quantum processor. CMOS circuits placed close to the quantum bits and operating at cryogenic temperatures offer the best ...

IEEE2019

Reversible Pebble Games For Reducing Qubits In Hierarchical Quantum Circuit Synthesis

Giovanni De Micheli, Mathias Soeken, Anupam Chattopadhyay, Debjyoti Bhattacharjee

Hierarchical reversible logic synthesis can find quantum circuits for large combinational functions. The price for a better scalability compared to functional synthesis approaches is the requirement for many additional qubits to store temporary results of ...

IEEE2019

Cryo-CMOS Electronics for Quantum Computing Applications

Edoardo Charbon

Quantum computers hold the promise to solve some of the most complex problems of today. The core of a quantum computer is a quantum processor, which is composed of quantum bits (qubits). Qubits are fragile and their state needs to be corrected in real time ...

IEEE2019

The electronic interface for quantum processors

Edoardo Charbon, Fabio Sebastiano

Quantum computers can potentially provide an unprecedented speed-up with respect to traditional computers. However, a significant increase in the number of quantum bits (qubits) and their performance is required to demonstrate such quantum supremacy. While ...

ELSEVIER SCIENCE BV2019

Scaling-up ESOP Synthesis for Quantum Compilation

Giovanni De Micheli, Mathias Soeken, Bruno Schmitt Antunes

Today's rapid advances in quantum computing hardware call for scalable synthesis methods to map combinational logic represented as multi-level Boolean networks (e.g., an and inverter graph, AIG) to quantum circuits. Such synthesis process must yield revers ...

IEEE2019

Cryo-CMOS Circuits and Systems for Quantum Computing Applications

Edoardo Charbon, Harald Arjan Robert Homulle, Fabio Sebastiano

A fault-tolerant quantum computer with millions of quantum bits (qubits) requires massive yet very precise control electronics for the manipulation and readout of individual qubits. CMOS operating at cryogenic temperatures down to 4 K (cryo-CMOS) allows fo ...

2017

A quantum electronic device

Bálint Náfrádi

This disclosure relates to quantum electronic devices for storing qubits. In particular, this disclosure relates to a quantum electronic device comprising a carbon nanosphere adapted to store a qubit represented by an electron spin and a control and readou ...

2017

15.5 Cryo-CMOS circuits and systems for scalable quantum computing

Edoardo Charbon, Harald Arjan Robert Homulle, Fabio Sebastiano

Quantum computing holds the promise to achieve unprecedented computation power and to solve problems today intractable. State-of-the-art quantum processors consist of arrays of quantum bits (qubits) operating at a very low base temperature, typically a few ...

2017

Quantum information density scaling and qubit operation time constraints of CMOS silicon-based quantum computer architectures

Edoardo Charbon, Fabio Sebastiano

Even the quantum simulation of an apparently simple molecule such as Fe2S2 requires a considerable number of qubits of the order of 106, while more complex molecules such as alanine (C3H7NO2) require about a hundred times more. In order to assess such a mu ...

2017