Publications de Amir Youssefi | EPFL Graph Search

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Mechanical oscillators can exhibit modes with ultra-low energy dissipation and compact form factors due to the slow velocity of acoustic waves, and are already used in applications ranging from timing to wireless filters. Over the past decade, novel ways i ...

A major challenge to the scalability of cryogenic computing platforms is the heat load associated with the growing number of electrical cable connections between the superconducting circuitry and the room-temperature environment. Compared with electrical c ...

Cavity optomechanics enables the control of mechanical motion through the radiation-pressure interaction(1), and has contributed to the quantum control of engineered mechanical systems ranging from kilogramme-scale Laser Interferometer Gravitational-wave O ...

Narrowband microwave filters have wide ranging applications, including the reduction in phase noise of microwave sources within a given frequency band. The prospect of developing an automated filter that tunes itself to an arbitrary desired frequency at ma ...

Vacuum-gap capacitors have recently attracted significant interest in superconducting circuit platforms due to their compact design and exceptionally low dielectric losses in the microwave regime. Their intrinsic ability to support mechanical vibrational m ...

An enduring challenge in constructing mechanical-oscillator-based hybrid quantum systems is to ensure engineered coupling to an auxiliary degree of freedom and maintain good mechanical isolation from the environment, that is, low quantum decoherence, consi ...

Collective phenomena arise from interactions within complex systems, leading to behaviors absent in individual components. Observing quantum collective phenomena with macroscopic mechanical oscillators has been impeded by the stringent requirement that osc ...

Superconducting qubits are among the most advanced candidates for achieving fault-tolerant quantum computing. Despite recent significant advancements in the qubit lifetimes, the origin of the loss mechanism for state-of-the-art qubits is still subject to i ...

Amir Youssefi

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Ultra-high quantum coherent and scalable superconducting circuit optomechanics, from topological lattices to quantum storage

A cryogenic electro-optic interconnect for superconducting devices

Topological lattices realized in superconducting circuit optomechanics

Automated wide-ranged finely tunable microwave cavity for narrowband phase noise filtering

Compact Superconducting Vacuum-gap Capacitors with Low Microwave Loss and High Mechanical Coherence for Scalable Quantum Circuits

A squeezed mechanical oscillator with millisecond quantum decoherence

Quantum collective motion of macroscopic mechanical oscillators

Mechanically induced correlated errors on superconducting qubits with relaxation times exceeding 0.4 ms