Performing quantum computing experiments in the cloud

Devitt, Simon J.

doi:10.1103/physreva.94.032329

Cited by 135 publications

(118 citation statements)

References 36 publications

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“…We did so using the recently available IBM quantum experience (QE) [34]. Three experiments have already appeared on the arXiv, conducted remotely by theoretical groups testing out experiments which had never been performed previously [35][36][37]. The QE architecture consists of five fixed-frequency superconducting transmon qubits, laid out in a 'star geometry' (four 'corner' qubits and one in the center).…”

Section: Methodsmentioning

confidence: 99%

Entropic uncertainty and measurement reversibility

2016

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The entropic uncertainty relation with quantum side information (EUR-QSI) from (Berta et al 2010 Nat. Phys. 6 659) is a unifying principle relating two distinctive features of quantum mechanics: quantum uncertainty due to measurement incompatibility, and entanglement. In these relations, quantum uncertainty takes the form of preparation uncertainty where one of two incompatible measurements is applied. In particular, the 'uncertainty witness' lower bound in the EUR-QSI is not a function of a post-measurement state. An insightful proof of the EUR-QSI from (Coles et al 2012 Phys. Rev. Lett. 108 210405) makes use of a fundamental mathematical consequence of the postulates of quantum mechanics known as the non-increase of quantum relative entropy under quantum channels. Here, we exploit this perspective to establish a tightening of the EUR-QSI which adds a new state-dependent term in the lower bound, related to how well one can reverse the action of a quantum measurement. As such, this new term is a direct function of the postmeasurement state and can be thought of as quantifying how much disturbance a given measurement causes. Our result thus quantitatively unifies this feature of quantum mechanics with the others mentioned above. We have experimentally tested our theoretical predictions on the IBM quantum experience and find reasonable agreement between our predictions and experimental outcomes.

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Section: Methodsmentioning

confidence: 99%

Entropic uncertainty and measurement reversibility

2016

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“…The origin of Quantum Mechanics is a crucial issue, not only for fundamental Physics but also for several fields of high-technology applications (electronics, computers [113,114], telecommunications [115,116]...). If conventional particles are actually excitations of a preonic vacuum, standard laws like Quantum Mechanics and relativity are expected to be low-energy approximations to a more fundamental (preonic) dynamics.…”

Section: Further Dynamical and Cosmological Considerationsmentioning

confidence: 99%

Quantum Mechanics, vacuum, particles, Gödel-Cohen incompleteness and the Universe

Gonzalez‐Mestres

2017

EPJ Web Conf.

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Abstract. Are the standard laws of Physics really fundamental principles? Does the physical vacuum have a more primordial internal structure? Are quarks, leptons, gauge bosons... ultimate elementary objects? These three basic questions are actually closely related. If the deep vacuum structure and dynamics turn out to be less trivial than usually depicted, the conventional "elementary" particles will most likely be excitations of such a vacuum dynamics that remains by now unknown. We then expect relativity and quantum mechanics to be low-energy limits of a more fundamental dynamical pattern that generates them at a deeper level. It may even happen that vacuum drives the expansion of the Universe from its own inner dynamics. Inside such a vacuum structure, the speed of light would not be the critical speed for vacuum constituents and propagating signals. The natural scenario would be the superbradyon (superluminal preon) pattern we postulated in 1995, with a new critical speed c s much larger than the speed of light c just as c is much larger than the speed of sound. Superbradyons are assumed to be the bradyons of a super-relativity associated to c s (a Lorentz invariance with c s as the critical speed). Similarly, the standard relativistic space-time with four real coordinates would not necessarily hold beyond low-energy and comparatively local distance scales. Instead, the spinorial space-time (SST) with two complex coordinates we introduced in 1996-97 may be the suitable one to describe the internal structure of vacuum and standard "elementary" particles and, simultaneously, Cosmology at very large distance scales. If the constituents of the preonic vacuum are superluminal, quantum entanglement appears as a natural property provided c s c . The value of c s can even be possibly found experimentally by studying entanglement at large distances. It is not excluded that preonic constituents of vacuum can exist in our Universe as free particles ("free" superbradyons), in which case we expect them to be weakly coupled to standard matter. If a preonic vacuum is actually leading the basic dynamics of Particle Physics and Cosmology, and standard particles are vacuum excitations, the Gödel-Cohen incompleteness will apply to vacuum dynamics whereas the conventional laws of physics will actually be approximate and have error bars. We discuss here the possible role of the superbradyonic vacuum and of the SST in generating Quantum Mechanics, as well as the implications of such a dynamical origin of the conventional laws of Physics and possible evidences in experiments and observations. Black holes, gravitational waves, possible "free" superbradyons or preonic waves, unconventional vacuum radiation... are considered from this point of view paying particular attention to LIGO, VIRGO and CERN experiments. This lecture is dedicated to the memory of John Bell

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“…The IBM Quantum Experience provides access to a 5-qubit quantum computer with a limited set of gates described by IBM as "the worlds first quantum computing platform delivered via the IBM Cloud." A body of research focuses on properties of 5-qubit systems [4,5], and much of it has recently been released or updated to rely upon results running on IBM's Quantum Experience [6][7][8][9][10][11][12][13]. With IBM's release of 16-and 20-qubit systems, the study of 5-qubit systems remains ideal for the education context, in which it is large enough to illustrate foundational quantum algorithms, yet small enough to illustrate calculations on the blackboard.…”

Section: Introductionmentioning

confidence: 99%

Quintuple: A Tool for Introducing Quantum Computing Into the Classroom

Moran

2018

Front. Phys.

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In May 2016 IBM released access to its 5-qubit quantum computer to the scientific community, its "IBM Quantum Experience" since acquiring over 60,000 users from students, educators and researchers around the globe. In the time since the "IBM Quantum Experience" became available, a flurry of research results on 5-qubit systems has been published derived from the platform hardware.Quintuple is an open-source object-oriented Python module implementing the ideal simulation of "IBM's Quantum Experience" hardware. Quintuple quantum algorithms can be programmed and run via a custom language fully compatible with the "IBM's Quantum Experience" or in pure Python. Over 40 example programs are provided with expected results, including Grover's Algorithm and the Deutsch-Jozsa algorithm. Quintuple's implementation is aimed at students and educators wishing to incorporate quantum computing into the classroom and enables students to follow a quantum computing calculation step-by-step and to verify hand calculations. For these students and educators, Quintuple contributes to the study of 5-qubit systems and the development and debugging of quantum algorithms for deployment on the "IBM Quantum Experience" hardware.

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Performing quantum computing experiments in the cloud

Cited by 135 publications

References 36 publications

Entropic uncertainty and measurement reversibility

Entropic uncertainty and measurement reversibility

Quantum Mechanics, vacuum, particles, Gödel-Cohen incompleteness and the Universe

Quintuple: A Tool for Introducing Quantum Computing Into the Classroom

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