JOSEPHSON MESOJUNCTIONS AS DETECTORS OF LOW-INTENSITY QUANTIZED COHERENT FAR-INFRARED FIELDS

2000 ◽  
Vol 14 (25n27) ◽  
pp. 3104-3109 ◽  
Author(s):  
R. MIGLIORE ◽  
A. MESSINA ◽  
A. NAPOLI
Keyword(s):  
Josephson Junction ◽  
Quantum Noise ◽  
Single Mode ◽  
Far Infrared ◽  
Shapiro Step ◽  
Low Intensity ◽  
Quantum Nature ◽  
Coherent Field ◽  
Quantized Fields

We show that the quantum nature of a mesoscopic Josephson junction may be exploited for detecting low-intensity electromagnetic quantized fields. In particular we prove that intensity and phase of single-mode quantized coherent field may be reconstructed measuring amplitude and quantum noise of the first quantum Shapiro step occurring in the I-V characteristic of the ultrasmall Josephson junction.

INTERACTION OF MESOSCOPIC JOSEPHSON JUNCTION WITH A SUCCESSIVE SQUEEZED COHERENT FIELD

2000 ◽  
Vol 14 (16) ◽  
pp. 609-618
Author(s):  
V. A. POPESCU
Keyword(s):  
Coherent State ◽  
Josephson Junction ◽  
Coherent States ◽  
Quantum Noise ◽  
Shapiro Steps ◽  
Superconducting Ring ◽  
Coherent Field ◽  
Current Voltage ◽  
Quantum Current ◽  
The Difference

Signal-to-quantum noise ratio for quantum current in mesoscopic Josephson junction of a circular superconducting ring can be improved if the electromagnetic field is in a successive squeezed coherent state. The mesoscopic Josephson junctions can feel the difference between the successive squeezed coherent states and other types of squeezed coherent states because their current–voltage Shapiro steps are different. We compare our method with another procedure for superposition of two squeezed coherent states (a squeezed even coherent state) and consider the effect of different large inductances on the supercurrent.

Far infrared frequency response of a Josephson junction in a self‐pumped mixer

1983 ◽  
Vol 54 (12) ◽  
pp. 7078-7082 ◽  
Author(s):  
J‐C. Henaux ◽  
G. Vernet ◽  
R. Adde
Keyword(s):  
Josephson Junction ◽  
Frequency Response ◽  
Far Infrared

scholarly journals Observation of quantum noise effects in a resistively shunted Josephson junction

Physica B+C ◽  
1982 ◽  
Vol 109-110 ◽  
pp. 2055-2057
Author(s):  
Roger H. Koch ◽  
D.J. Van Harlingen ◽  
John Clarke
Keyword(s):  
Josephson Junction ◽  
Quantum Noise ◽  
Noise Effects

scholarly journals Induced Topological Superconductivity in a BiSbTeSe2-Based Josephson Junction

Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 794 ◽  
Author(s):  
Bob de Ronde ◽  
Chuan Li ◽  
Yingkai Huang ◽  
Alexander Brinkman
Keyword(s):  
Radio Frequency ◽  
Josephson Junction ◽  
Frequency Response ◽  
Systematic Study ◽  
Bound States ◽  
Shapiro Step ◽  
Majorana Bound States ◽  
Irradiation Power ◽  
Radio Frequency Waves ◽  
High Irradiation

A 4 π -periodic supercurrent through a Josephson junction can be a consequence of the presence of Majorana bound states. A systematic study of the radio frequency response for several temperatures and frequencies yields a concrete protocol for examining the 4 π -periodic contribution to the supercurrent. This work also reports the observation of a 4 π -periodic contribution to the supercurrent in BiSbTeSe 2 -based Josephson junctions. As a response to irradiation by radio frequency waves, the junctions showed an absence of the first Shapiro step. At high irradiation power, a qualitative correspondence to a model including a 4 π -periodic component to the supercurrent is found.

scholarly journals Emission and Absorption Asymmetry in the Quantum Noise of a Josephson Junction

2006 ◽  
Vol 96 (13) ◽  
Author(s):  
P.-M. Billangeon ◽  
F. Pierre ◽  
H. Bouchiat ◽  
R. Deblock
Keyword(s):  
Josephson Junction ◽  
Quantum Noise

THE INTENSITY CORRELATION TIME OF A SINGLE-MODE LASER DRIVEN BY BOTH COLORED PUMP NOISE WITH SIGNAL MODULATION AND QUANTUM NOISE WITH CROSS-CORRELATION BETWEEN ITS REAL AND IMAGINARY PARTS

2006 ◽  
Vol 20 (29) ◽  
pp. 1867-1878
Author(s):  
QING-HUA CHENG ◽  
DA-HAI XU ◽  
LI CAO ◽  
DA-JIN WU
Keyword(s):  
Correlation Time ◽  
Cross Correlation ◽  
Quantum Noise ◽  
Laser System ◽  
Single Mode ◽  
Time Correlation ◽  
Statistical Fluctuation ◽  
Intensity Correlation ◽  
Single Mode Laser ◽  
Modulation Signal

Using linear approximation method, we calculate the intensity correlation time of a single-mode laser driven by both colored pump noise with signal modulation and quantum noise with cross-correlation between its real and imaginary parts, and analyze the influence of the signal, noise and its cross-correlation form on the statistical fluctuation of the laser system. We detect that the "color" of pump noise is an important factor that affects the statistical fluctuation of the laser system. When the colored pump noise is short time correlation, within a determinate parameter range, the intensity correlation time can be prolonged, and the statistical fluctuation of the laser system can be restrained by increasing the amplitude of modulation signal. The specific frequency of input signal will result in intensity correlation time to appear maximum, and the statistical fluctuation of the laser system is least here. When the colored pump noise is long time correlation, within a determinate parameter range, the intensity correlation time can be also prolonged by increasing the frequency of modulation signal and decreasing its amplitude, and the statistical fluctuation of the laser system will decrease. In particular, when the intensity of quantum noise increases and the cross-correlation between its real and imaginary parts enhance, the intensity correlation time will prolong, and the statistical fluctuation of the laser system is restrained.

Stationary properties in a single-mode laser with cross-correlation between quantum noise terms

2001 ◽  
Vol 281 (2-3) ◽  
pp. 113-118 ◽  
Author(s):  
S.Z. Ke ◽  
L. Cao ◽  
D.J. Wu ◽  
K.L. Yao
Keyword(s):  
Cross Correlation ◽  
Quantum Noise ◽  
Single Mode ◽  
Mode Laser ◽  
Single Mode Laser
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