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Now showing items 161-170 of 267
Dual-path methods for propagating quantum microwaves
(IOP Publishing, 2014-01)
We study quantum state tomography, entanglement detection and channel noise reconstruction of propagating quantum microwaves via dual-path methods. The presented schemes make use of the following key elements: propagation ...
Quantum simulations of relativistic quantum physics in circuit QED
(IOP Publishing, 2013-06)
We present a scheme for simulating relativistic quantum physics in circuit quantum electrodynamics. By using three classical microwave drives, we show that a superconducting qubit strongly coupled to a resonator field mode ...
From transistor to trapped-ion computers for quantum chemistry
(Nature Publishing Group, 2014-01)
Over the last few decades, quantum chemistry has progressed through the development of computational methods based on modern digital computers. However, these methods can hardly fulfill the exponentially-growing resource ...
A continued fraction based approach for the Two-photon Quantum Rabi Model
(Nature Publishing, 2019-03-11)
We study the Two Photon Quantum Rabi Model by way of its spectral functions and survival probabilities. This approach allows numerical precision with large truncation numbers, and thus exploration of the spectral collapse. ...
A quantitative witness for Greenberger-Horne-Zeilinger entanglement
(Nature Publishing Group, 2012-12)
Along with the vast progress in experimental quantum technologies there is an increasing demand for the quantification of entanglement between three or more quantum systems. Theory still does not provide adequate tools for ...
Measurement-Based Adaptation Protocol with Quantum Reinforcement Learning in a Rigetti Quantum Computer
(MDPI, 2020-05-19)
We present an experimental realisation of a measurement-based adaptation protocol with quantum reinforcement learning in a Rigetti cloud quantum computer. The experiment in this few-qubit superconducting chip faithfully ...
The shape of higher-dimensional state space: Bloch-ball analog for a qutrit
(Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften, 2021-06-29)
[EN] Geometric intuition is a crucial tool to
obtain deeper insight into many concepts
of physics. A paradigmatic example of its
power is the Bloch ball, the geometrical
representation for the state space of the
simplest ...
Multiqubit and multilevel quantum reinforcement learning with quantum technologies
(Public Library Science, 2018-07-19)
We propose a protocol to perform quantum reinforcement learning with quantum technologies. At variance with recent results on quantum reinforcement learning with superconducting circuits, in our current protocol coherent ...
Quantum Simulation Of The Quantum Rabi Model In A Trapped Ion
(American Physical Society, 2018-04-30)
The quantum Rabi model, involving a two-level system and a bosonic field mode, is arguably the simplest and most fundamental model describing quantum light-matter interactions. Historically, due to the restricted parameter ...
Invited Article: Quantum Memristors in Quantum Photonics
(American Institute Of Physics, 2018-08)
We propose a method to build quantum memristors in quantum photonic platforms. We first design an effective beam splitter, which is tunable in real time, by means of a Mach-Zehnder-type array with two equal 50:50 beam ...