Electronics for deep space cryogenic applications

Excellent energy‐storage property and thermal stability of PLZT‐based antiferroelectric ceramics

“…Since the 1960s, pulsed power technology has been widely used in national defense, scientific research, and civil and other fields because of its high voltage, high power current, and strong pulse 1–5 . Ceramic capacitors are widely used in pulse capacitors because of their high energy storage density, low loss, wide temperature stability, and fast discharge speed.…”

“…For a long time, researchers have focused on how to improve energy‐storage density and efficiency 9–11 . Moreover, in recent years, researchers have begun to pursue high performance at the same time as well as high temperature stability because of the requirements for commercial applications of capacitors in different working environments 2,12–15 . Although many Pb‐based AFE materials with higher energy storage density in the positive temperature range have been reported here, 16–18 few materials focus on the temperature stability of energy‐storage density from subzero to high temperatures.…”

Identification of Time-varying in situ Signals in Quantum Circuits

“…For the example of superconducting quantum chips [11] shown in Fig. 1, the DC or AC control signals always experience distortion along the attenuator and the control line [11][12][13][14][15][16][17][18][19], but the distorted signals can only be indirectly acquired by the qubit readout signals.…”

Learning to Calibrate Quantum Control Pulses by Iterative Deconvolution

“…To date, high-fidelity quantum gates above error-correction threshold have been achieved [4], but there is still a long way to go for scalable quantum computation due to the decoherence induced by environmental interactions and systematic errors induced by imperfect control electronics. In this paper, we are concerned with the latter systematic error caused by the distortion of control signals delivered to the qubits [5][6][7][8][9][10][11]. For example, in the manipulation of superconducting qubits shown in Fig.…”

“…1, the arbitrary waveform generator (AWG) sends control signals to the superconductor quantum circuits via transmission lines [12], which, together with the associated transmission line and electronic components, can induce linear distortion by spurious inductance, capacitors and resonators, as well as nonlinear distortion induced by current-dependent inductances and resistances [5-9, 13, 14]. Besides, in low-temperature experiments, the change of electronic properties of the circuit elements may lead to additional distortions [10,11]. All these factors can severely decrease the precision of states and gate ma-nipulations and hence must be corrected.…”