scholarly journals NOISY QUANTUM MONTY HALL GAME

2010 ◽  
Vol 09 (01) ◽  
pp. 9-18 ◽  
Author(s):  
PIOTR GAWRON
Keyword(s):  
Spontaneous Emission ◽  
Quantum Noise ◽  
Density Matrices ◽  
Emission Channel ◽  
Monty Hall ◽  
Zero Sum ◽  
Quantum Strategies

The influence of spontaneous emission channel and generalized Pauli channel on quantum Monty Hall Game is analyzed. The scheme of Flittney and Abbott is reformulated using the formalism of density matrices. Optimal classical strategies for given quantum strategies are found. The whole presented scheme illustrates how quantum noise may change the odds of a zero-sum game.

Effect of Spontaneous Emission Noise and Modulation on Semiconductor Lasers Near Threshold with Optical Feedback

2003 ◽  
Vol 17 (22n24) ◽  
pp. 4123-4138 ◽  
Author(s):  
Wing-Shun Lam ◽  
Parvez N. Guzdar ◽  
Rajarshi Roy
Keyword(s):  
Semiconductor Lasers ◽  
Spontaneous Emission ◽  
Quantum Noise ◽  
Optical Feedback ◽  
Dynamical Behavior ◽  
Threshold Current ◽  
Rate Equations ◽  
Simple Explanation ◽  
Feedback Strength ◽  
Near Threshold

The dynamical behavior of power dropouts in a semiconductor laser with optical feedback, pumped near threshold current, is strongly influenced by quantum noise. This is clearly demonstrated by experiments with modulations on the pumping current or the feedback strength. For the cases without modulation and with only current modulation, the dropouts occur randomly. However the feedback strength modulation locks the dropout events periodically. By numerically modeling these three cases using the Lang–Kobayashi equations with a stochastic term to take into account spontaneous emission noise, it is shown that the observed behavior of the dropouts can be readily reproduced for all three cases. Noise plays a signifcant role in explaining the observed dropout events. A simple explanation of the observed dropout phenomenon is presented, based on the adiabatic motion of the ellipse formed by the steady state solutions of the rate equations due to slow time modulations of the injection current or the feedback strength.

Two-photon correlated–spontaneous-emission laser: Quantum noise quenching and squeezing

1988 ◽  
Vol 60 (18) ◽  
pp. 1832-1835 ◽  
Author(s):  
Marlan O. Scully ◽  
K. Wódkiewicz ◽  
M. S. Zubairy ◽  
J. Bergou ◽  
Ning Lu ◽  
...  
Keyword(s):  
Spontaneous Emission ◽  
Quantum Noise ◽  
Two Photon

scholarly journals Semi-quantum noise randomized data encryption based on an amplified spontaneous emission light source

2018 ◽  
Vol 26 (9) ◽  
pp. 11587 ◽  
Author(s):  
Haisong Jiao ◽  
Tao Pu ◽  
Jilin Zheng ◽  
Hua Zhou ◽  
Lin Lu ◽  
...  
Keyword(s):  
Light Source ◽  
Spontaneous Emission ◽  
Quantum Noise ◽  
Amplified Spontaneous Emission ◽  
Data Encryption ◽  
Emission Light

Cavity-assisted spontaneous emission: macroscopic QED versus quantum noise theory

2009 ◽  
Vol T135 ◽  
pp. 014015 ◽  
Author(s):  
M Khanbekyan ◽  
D-G Welsch ◽  
C Di Fidio ◽  
W Vogel
Keyword(s):  
Spontaneous Emission ◽  
Quantum Noise

scholarly journals Quantum control of phase fluctuations in semiconductor lasers

2018 ◽  
Vol 115 (34) ◽  
pp. E7896-E7904 ◽  
Author(s):  
Christos T. Santis ◽  
Yaakov Vilenchik ◽  
Naresh Satyan ◽  
George Rakuljic ◽  
Amnon Yariv
Keyword(s):  
Semiconductor Lasers ◽  
Spontaneous Emission ◽  
Quantum Control ◽  
Quantum Noise ◽  
Optical Feedback ◽  
Dynamic Properties ◽  
Relaxation Oscillation ◽  
Optical Loss ◽  
Laser Systems ◽  
Order Of Magnitude

Few laser systems allow access to the light–emitter interaction as versatile and direct as that afforded by semiconductor lasers. Such a level of access can be exploited for the control of the coherence and dynamic properties of the laser. Here, we demonstrate, theoretically and experimentally, the reduction of the quantum phase noise of a semiconductor laser through the direct control of the spontaneous emission into the laser mode, exercised via the precise and deterministic manipulation of the optical mode’s spatial field distribution. Central to the approach is the recognition of the intimate interplay between spontaneous emission and optical loss. A method of leveraging and “walking” this fine balance to its limit is described. As a result, some two orders of magnitude reduction in quantum noise over the state of the art in semiconductor lasers, corresponding to a minimum linewidth of 1 kHz, is demonstrated. Further implications, including an additional order-of-magnitude enhancement in effective coherence by way of control of the relaxation oscillation resonance frequency and enhancement of the intrinsic immunity to optical feedback, highlight the potential of the proposed concept for next-generation, integrated coherent systems.

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