Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Mencia, Raymond A."'
We describe a superconducting qubit derived from operating a properly designed fluxonium circuit in a zero magnetic field. The qubit has a frequency of about 4 GHz and the energy relaxation quality factor $Q \approx 0.7\times 10^7$, even though the d
Externí odkaz:
http://arxiv.org/abs/2403.16780
Autor:
Kuzmin, Roman, Mehta, Nitish, Grabon, Nicholas, Mencia, Raymond A., Burshtein, Amir, Goldstein, Moshe, Manucharyan, Vladimir E.
Although quantum mechanics applies to many macroscopic superconducting devices, one basic prediction remained controversial for decades. Namely, a Josephson junction connected to a resistor must undergo a dissipation-induced quantum phase transition
Externí odkaz:
http://arxiv.org/abs/2304.05806
Autor:
Somoroff, Aaron, Truitt, Patrick, Weis, Adam, Bernhardt, Jacob, Yohannes, Daniel, Walter, Jason, Kalashnikov, Konstantin, Renzullo, Mario, Mencia, Raymond A., Vavilov, Maxim G., Manucharyan, Vladimir E., Vernik, Igor V., Mukhanov, Oleg
The strong anharmonicity and high coherence times inherent to fluxonium superconducting circuits are beneficial for quantum information processing. In addition to requiring high-quality physical qubits, a quantum processor needs to be assembled in a
Externí odkaz:
http://arxiv.org/abs/2303.01481
Autor:
Dogan, Ebru, Rosenstock, Dario, Guevel, Loïck Le, Xiong, Haonan, Mencia, Raymond A., Somoroff, Aaron, Nesterov, Konstantin N., Vavilov, Maxim G., Manucharyan, Vladimir E., Wang, Chen
The superconducting fluxonium qubit has a great potential for high-fidelity quantum gates with its long coherence times and strong anharmonicity at the half flux quantum sweet spot. However, current implementations of two-qubit gates compromise fluxo
Externí odkaz:
http://arxiv.org/abs/2204.11829
Autor:
Somoroff, Aaron, Ficheux, Quentin, Mencia, Raymond A., Xiong, Haonan, Kuzmin, Roman V., Manucharyan, Vladimir E.
Increasing the degree of control over physical qubits is a crucial component of quantum computing research. We report a superconducting qubit of fluxonium type with the Ramsey coherence time reaching $T_2^*= 1.48 \pm 0.13 \mathrm{~ms}$, which exceeds
Externí odkaz:
http://arxiv.org/abs/2103.08578
We report a novel method of growing strongly-disordered superconducting titanium nitride (TiN) thin films by reactive electron-beam deposition. The normal state sheet resistance and superconducting critical temperature (Tc) can be tuned by controllin
Externí odkaz:
http://arxiv.org/abs/2011.09446
Autor:
Pechenezhskiy, Ivan V., Mencia, Raymond A., Nguyen, Long B., Lin, Yen-Hsiang, Manucharyan, Vladimir E.
Publikováno v:
Nature 585, 368 (2020)
The non-dissipative non-linearity of a Josephson junction converts macroscopic superconducting circuits into artificial atoms, enabling some of the best controlled quantum bits (qubits) today. Three fundamental types of superconducting qubits are kno
Externí odkaz:
http://arxiv.org/abs/1907.02937
Autor:
Nguyen, Long B., Lin, Yen-Hsiang, Somoroff, Aaron, Mencia, Raymond, Grabon, Nicholas, Manucharyan, Vladimir E.
Publikováno v:
Phys. Rev. X 9, 041041 (2019)
We report superconducting fluxonium qubits with coherence times largely limited by energy relaxation and reproducibly satisfying T2 > 100 microseconds (T2 > 300 microseconds in one device). Moreover, given the state of the art values of the surface l
Externí odkaz:
http://arxiv.org/abs/1810.11006
Publikováno v:
npj Quantum Information 5, 20 (2019)
Vacuum fluctuations fundamentally affect an atom by inducing a finite excited state lifetime along with a Lamb shift of its transition frequency. Here we report the reverse effect: modification of vacuum modes by a single atom in circuit quantum elec
Externí odkaz:
http://arxiv.org/abs/1809.10739
Autor:
Kuzmin, Roman, Mencia, Raymond, Grabon, Nicholas, Mehta, Nitish, Lin, Yen-Hsiang, Manucharyan, Vladimir E.
Publikováno v:
Nature Physics 15, 930 (2019)
A chain of Josephson junctions implements one of the simplest many-body models undergoing a superconductor-insulator (SI) quantum phase transition between states with zero and infinite resistance. Apart from zero resistance, the superconducting state
Externí odkaz:
http://arxiv.org/abs/1805.07379