Zobrazeno 1 - 10
of 671
pro vyhledávání: '"Pekola, P"'
Autor:
Satrya, Christoforus Dimas, Chang, Yu-Cheng, Upadhyay, Rishabh, Makinen, Ilari K., Peltonen, Joonas T., Karimi, Bayan, Pekola, Jukka P.
Superconducting circuits provide a versatile and controllable platform for studies of fundamental quantum phenomena as well as for quantum technology applications. A conventional technique to read out the state of a quantum circuit or to characterize
Externí odkaz:
http://arxiv.org/abs/2409.13417
Autor:
Lvov, Dmitrii S., Lemziakov, Sergei A., Ankerhold, Elias, Peltonen, Joonas T., Pekola, Jukka P.
We report temperature measurements using a transmon qubit by detecting the population of the first three levels of it, after employing a sequence of $\pi$-pulses and performing projective dispersive readout. We measure the effective temperature of th
Externí odkaz:
http://arxiv.org/abs/2409.02784
Autor:
Nakamura, Shuji, Yoshioka, Teruaki, Lemziakov, Sergei, Lvov, Dmitrii, Mukai, Hiroto, Tomonaga, Akiyoshi, Takada, Shintaro, Okazaki, Yuma, Kaneko, Nobu-Hisa, Pekola, Jukka, Tsai, Jaw-Shen
Recent advancements in circuit quantum electrodynamics have enabled precise manipulation and detection of the single energy quantum in quantum systems. A quantum circuit refrigerator (QCR) is capable of electrically cooling the excited population of
Externí odkaz:
http://arxiv.org/abs/2407.14219
Autor:
Pekola, Jukka P., Karimi, Bayan
We discuss thermalization in a multimode quantum cavity under unitary evolution. According to general principles, an isolated system with quadratic couplings does not exhibit thermalization. However, we find that three-wave perturbation, typical for
Externí odkaz:
http://arxiv.org/abs/2404.19511
Motivated by recent experiments (Subero et. al. Nature Comm. $\bf{14}$, 7924 (2023)) we analyze photonic heat transport through a Josephson junction in a dissipative environment. For this purpose we derive the general expressions for the heat current
Externí odkaz:
http://arxiv.org/abs/2403.13526
Autor:
Karimi, Bayan, Steffensen, Gorm Ole, Higginbotham, Andrew P., Marcus, Charles M., Yeyati, Alfredo Levy, Pekola, Jukka P.
A Josephson junction (JJ) has been under intensive study ever since 1960's. Yet even in the present era of building quantum information processing devices based on many JJs, open questions regarding a single junction remain unsolved, such as quantum
Externí odkaz:
http://arxiv.org/abs/2402.09314
Collective effects, such as Dicke superradiant emission, can enhance the performance of a quantum device. Here, we study the heat current flowing between a cold and a hot bath through an ensemble of $N$ qubits, which are collectively coupled to the t
Externí odkaz:
http://arxiv.org/abs/2401.17469
Autor:
Pekola, Jukka P., Karimi, Bayan
Publikováno v:
Entropy 46, 429 (2024)
We discuss the concept and realization of a heat bath in solid state quantum systems. First we demonstrate that, unlike a true resistor, a finite one-dimensional Josephson junction array or analogously a transmission line with non-vanishing frequency
Externí odkaz:
http://arxiv.org/abs/2310.01246
Publikováno v:
Open Sys. & Info. Dyn. 30 (02), 2350009 (2023)
We discuss the long-time relaxation of a qubit linearly coupled to a finite bath of $N$ spins (two-level systems, TLSs), with the interaction Hamiltonian in rotating wave approximation. We focus on the regime $N\gg 1$, assuming that the qubit-bath co
Externí odkaz:
http://arxiv.org/abs/2305.08692
Autor:
Upadhyay, Rishabh, Golubev, Dmitry S., Chang, Yu-Cheng, Thomas, George, Guthrie, Andrew, Peltonen, Joonas T., Pekola, Jukka P.
The fragile nature of quantum circuits is a major bottleneck to scalable quantum applications. Operating at cryogenic temperatures, quantum circuits are highly vulnerable to amplifier backaction and external noise. Non-reciprocal microwave devices su
Externí odkaz:
http://arxiv.org/abs/2304.00799