Publications associées à Porte quantique

Variational dynamics as a ground-state problem on a quantum computer

Giuseppe Carleo, Stefano Barison, Filippo Vicentini

We propose a variational quantum algorithm to study the real-time dynamics of quantum systems as a ground -state problem. The method is based on the original proposal of Feynman and Kitaev to encode time into a register of auxiliary qubits. We prepare the ...

AMER PHYSICAL SOC2022

Perimeter Modes of Nanomechanical Resonators Exhibit Quality Factors Exceeding 10(9) at Room Temperature

Tobias Kippenberg, Guanhao Huang, Alberto Beccari, Amirali Arabmoheghi, Nils Johan Engelsen, Sergey Fedorov

Systems with low mechanical dissipation are extensively used in precision measurements such as gravitational wave detection, atomic force microscopy, and quantum control of mechanical oscillators via optomechanics and electromechanics. The mechanical quali ...

AMER PHYSICAL SOC2022

Quantum error correction using squeezed Schrodinger cat states

Vincenzo Savona, Fabrizio Minganti, David Schlegel

Bosonic quantum codes redundantly encode quantum information in the states of a quantum harmonic oscillator, making it possible to detect and correct errors. Schrodinger cat codes-based on the superposition of two coherent states with opposite displacement ...

AMER PHYSICAL SOC2022

A Cryo-CMOS PLL for Quantum Computing Applications

Edoardo Charbon, Fabio Sebastiano

This article presents the first cryogenic phase-locked loop (PLL) operating at 4.2 K. The PLL is designed for the control system of scalable quantum computers. The specifications of PLL are derived from the required control fidelity for a single-qubit oper ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2022

Coherent Hole Transport in Selective Area Grown Ge Nanowire Networks

Anna Fontcuberta i Morral, Alok Rudra, Andrea Giunto, Santhanu Panikar Ramanandan, Nicholas Paul Morgan

Holes in germanium nanowires have emerged as a realistic platform for quantum computing based on spin qubit logic. On top of the large spin–orbit coupling that allows fast qubit operation, nanowire geometry and orientation can be tuned to cancel out charge ...

2022

A Cryo-CMOS Oscillator With an Automatic Common-Mode Resonance Calibration for Quantum Computing Applications

Edoardo Charbon, Fabio Sebastiano, Yue Chen

This article presents a 4-to-5 GHz LC oscillator operating at 4.2K for quantum computing applications. The phase noise (PN) specification of the oscillator is derived based on the control fidelity for a single-qubit operation. To reveal the substantial gap ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2022

Spatial Isolation Implies Zero Knowledge Even in a Quantum World

Alessandro Chiesa

Zero knowledge plays a central role in cryptography and complexity. The seminal work of Ben-Or et al. (STOC 1988) shows that zero knowledge can be achieved unconditionally for any language in NEXP, as long as one is willing to make a suitable physical assu ...

ASSOC COMPUTING MACHINERY2022

Bayesian tomography of high-dimensional on-chip biphoton frequency combs with randomized measurements

Tobias Kippenberg, Junqiu Liu

Owing in large part to the advent of integrated biphoton frequency combs, recent years have witnessed increased attention to quantum information processing in the frequency domain for its inherent high dimensionality and entanglement compatible with fiber- ...

NATURE PORTFOLIO2022

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Porte quantique

Variational dynamics as a ground-state problem on a quantum computer

Perimeter Modes of Nanomechanical Resonators Exhibit Quality Factors Exceeding 10(9) at Room Temperature

Quantum error correction using squeezed Schrodinger cat states

A Cryo-CMOS PLL for Quantum Computing Applications

Coherent Hole Transport in Selective Area Grown Ge Nanowire Networks

A Cryo-CMOS Oscillator With an Automatic Common-Mode Resonance Calibration for Quantum Computing Applications

Spatial Isolation Implies Zero Knowledge Even in a Quantum World

Bayesian tomography of high-dimensional on-chip biphoton frequency combs with randomized measurements

Quantum Circuits for the Preparation of Spin Eigenfunctions on Quantum Computers

Fully Tunable Longitudinal Spin-Photon Interactions in Si and Ge Quantum Dots

Graph Chatbot

Chattez avec Graph Search

Quantum error correction using squeezed Schrodinger cat states

Spatial Isolation Implies Zero Knowledge Even in a Quantum World

A Cryo-CMOS Oscillator With an Automatic Common-Mode Resonance Calibration for Quantum Computing Applications

Perimeter Modes of Nanomechanical Resonators Exhibit Quality Factors Exceeding 10(9) at Room Temperature

Variational dynamics as a ground-state problem on a quantum computer

A Cryo-CMOS PLL for Quantum Computing Applications

Bayesian tomography of high-dimensional on-chip biphoton frequency combs with randomized measurements

Fully Tunable Longitudinal Spin-Photon Interactions in Si and Ge Quantum Dots

Quantum Circuits for the Preparation of Spin Eigenfunctions on Quantum Computers

Coherent Hole Transport in Selective Area Grown Ge Nanowire Networks