Jovan Markov

Jovan Markov

Spending my time lowering entropy around me. I also like coffee ☕.

Posts by Collection

portfolio

publications

Calibration of the momentum scale of a particle physics detector using the Armenteros-Podolanski plot

Published in Journal of Instrumentation, 2021

A method for calibrating the momentum scale in a particle physics detector is described. The method relies on the determination of the masses of the final state particles in two-body decays of neutral particles, which can then be used to obtain corrections in the momentum scale. A modified version of the Armenteros-Podolanski plot and the KS0 → π+ π- decay is used as a proof of principle for this method. A precision at the 10-6–10-8 level is achieved in simplified simulations.

Recommended citation: P. Baladrón Rodríguez et al 2021 JINST 16 P06036
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The inverse Mpemba effect demonstrated on a single trapped ion qubit

Published in PRL, 2024

Here we propose a quantum analog of the Mpemba effect, on the simplest quantum system, a qubit. Specifically, we show it exhibits an inverse effect, in which a cold qubit reaches a hot temperature faster than a hot qubit. Furthermore, in our system a cold qubit can heat up exponentially faster, manifesting the strong version of the effect. This occurs only for sufficiently coherent systems, making this effect quantum mechanical, i.e. due to interference effects.

Recommended citation: Phys. Rev. Lett. 133, 010403 – Published 1 July 2024
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resources

talks

Tutorial in Theoretical Classical Mechanics

Published:

I conducted a tutorial on theoretical classical mechanics for students attending the Physics Seminar 2. The session began with a lecture introducing the concepts of Lagrangian, action, and the variational principle. This was followed by a problem-solving session. The lecture was based on the Feynman Lectures on Physics, and the problems were derived from the Landau and Lifshitz Classical Mechanics textbook. PDF with the tutorial material (in Serbian).

Digital Predistortion of Optical Field of a Fast and High-Fidelity Entangling Gate for Trapped Ion Qubits

Published:

Tapped ions qubits are a leading quantum computing platform. In these systems, entangling gates are performed by driving the normal modes of motion of the ion chain, generating a spin-dependent force that mediates qubit-qubit interactions. In recent years, there have been many theoretical proposals and experimental demonstrations which have generalized this approach in order to increase the fidelity, robustness, and programmability of the entangling operation. These are all performed by carefully designing the electromagnetic fields which drive the ion chain. However, various components such as amplifiers and modulators, which are used to generate the required field modulations have inherent non-linear responses, resulting in an inaccurate and low-fidelity implementation of the entangling operations. We propose a method to mitigate this degradation by using digital pre-distortion of the modulating waveform. Specifically, we measure the temporal and amplitude non-linear response of an acousto-optic modulator used to modulate the optical field driving the ion chain, and use it in a feed-forward correction of the desired waveform. We measure that the resulting optical field more closely resembles the desired spectrum. Moreover, we use the pre-distorted signal to generate a multi-tone two-qubit entangling gate described in Ref. [1]. We show that our method allows us to utilize all the available optical power in order to drive fast entanglement gates, without incurring fidelity loss due to unwanted non-linear effects. Our method is straightforward to implement, even in complicated waveform modulation, such as Refs. [2,3], which require many driving tones in order to generate multi-qubit robust entanglement gates. Presenter: Jovan Markov (Weizmann Institute of Science) Authors: Jovan Markov (Weizmann Institute of Science) Yotam Shapira (Weizmann Institute of Science) Nitzan Akerman (Weizmann Institute of Science) Roee Ozeri (Weizmann Institute of Science) References: 1. Phys. Rev. Lett. 121, 180502 (2018) 2. Phys. Rev. A 101, 032330 (2020) 3. Phys. Rev. Lett. 130, 030602 (2023) For more details, visit the conference website.

Quantum Computers and What to Do with Them

Published:

This talk, presented in Belgrade, covers the topic of quantum computers and their potential applications. It was delivered at the Annual New Year Seminar at the Faculty of Physics, University of Belgrade. The discussion includes an overview of quantum computing platforms and a project we did in Ozeri lab regarding quantum simulations with trapped ions.

teaching

Teaching experience 1

Undergraduate course, University 1, Department, 2014

This is a description of a teaching experience. You can use markdown like any other post.

Teaching experience 2

Workshop, University 1, Department, 2015

This is a description of a teaching experience. You can use markdown like any other post.