scholarly journals Analysis of Controlled Rabi Flopping in a Double Rephasing Photon Echo Scheme for Quantum Memories

Entropy ◽  
2020 ◽  
Vol 22 (9) ◽  
pp. 1007
Author(s):  
Rahmat Ullah ◽  
Byoung S. Ham
Keyword(s):  
Excited State ◽  
Phase Shift ◽  
Quantum Coherence ◽  
Photon Echo ◽  
Phase Control ◽  
Quantum Memory ◽  
Photon Echoes ◽  
Memory Applications

A double rephasing scheme of a photon echo is analyzed for inversion-free photon echo-based quantum memories using controlled Rabi flopping, where the Rabi flopping is used for phase control of collective atom coherence. Unlike the rephasing-caused π-phase shift in a single rephasing scheme, the control Rabi flopping between the excited state and an auxiliary third state induces coherence inversion. Thus, the absorptive photon echo in a double rephasing scheme can be manipulated to be emissive. Here, we present a quantum coherence control of atom phases in a double rephasing photon echo scheme for emissive photon echoes for quantum memory applications.

scholarly journals Understanding of Collective Atom Phase Control in Modified Photon Echoes for a Near-Perfect Storage Time-Extended Quantum Memory

Entropy ◽  
2020 ◽  
Vol 22 (8) ◽  
pp. 900 ◽  
Author(s):  
Rahmat Ullah ◽  
Byoung S. Ham
Keyword(s):  
Storage Time ◽  
Photon Echo ◽  
Matching Condition ◽  
Propagation Direction ◽  
Quantum Memory ◽  
Level System ◽  
Bloch Equations ◽  
Photon Echoes ◽  
Phase Matching Condition ◽  
Maxwell Bloch Equations

A near-perfect storage time-extended photon echo-based quantum memory protocol has been analyzed by solving the Maxwell–Bloch equations for a backward scheme in a three-level system. The backward photon echo scheme is combined with a controlled coherence conversion process via controlled Rabi flopping to a third state, where the control Rabi flopping collectively shifts the phase of the ensemble coherence. The propagation direction of photon echoes is coherently determined by the phase-matching condition between the data (quantum) and the control (classical) pulses. Herein, we discuss the classical controllability of a quantum state for both phase and propagation direction by manipulating the control pulses in both single and double rephasing photon echo schemes of a three-level system. Compared with the well-understood uses of two-level photon echoes, the Maxwell–Bloch equations for a three-level system have a critical limitation regarding the phase change when interacting with an arbitrary control pulse area.

Measurement of excited-state lifetime using two-pulse photon echoes in rubidium vapor

2007 ◽  
Vol 24 (3) ◽  
pp. 671 ◽  
Author(s):  
E. A. Rotberg ◽  
B. Barrett ◽  
S. Beattie ◽  
S. Chudasama ◽  
M. Weel ◽  
...  
Keyword(s):  
Excited State ◽  
Excited State Lifetime ◽  
Rubidium Vapor ◽  
Photon Echoes ◽  
Pulse Photon

Shallow donor qubits in ZnO for quantum memory applications

2021 ◽  
Author(s):  
Christian Zimmermann ◽  
Vasilis Niaouris ◽  
Maria L. Viitaniemi ◽  
Kai-Mei C. Fu
Keyword(s):  
Shallow Donor ◽  
Quantum Memory ◽  
Memory Applications

scholarly journals Experimental realization of revival of silenced echo memory protocol in optical cavity

2018 ◽  
Vol 190 ◽  
pp. 03007
Author(s):  
Mansur Minnegaliev ◽  
Konstantin Gerasimov ◽  
Ravil Urmancheev ◽  
Sergey Moiseev
Keyword(s):  
Quantum Efficiency ◽  
Optical Cavity ◽  
Photon Echo ◽  
Quantum Memory ◽  
Optical Pulses ◽  
Experimental Realization ◽  
Light Pulses ◽  
The Rose

We demonstrated a photon echo quantum memory for weak input optical pulses on the ROSE protocol in a Tm3+:Y3Al5O12 crystal placed in impedance-matched optical cavity. The quantum efficiency of 21% for a storage of time of 36 µs was achieved for single light pulses.

scholarly journals Light trapping in high-density ultracold atomic gases for quantum memory applications

2010 ◽  
Vol 57 (19) ◽  
pp. 1833-1840 ◽  
Author(s):  
I.M. Sokolov ◽  
D.V. Kupriyanov ◽  
R.G. Olave ◽  
M.D. Havey
Keyword(s):  
Light Trapping ◽  
High Density ◽  
Quantum Memory ◽  
Atomic Gases ◽  
Ultracold Atomic Gases ◽  
Memory Applications

Excited-State Vibronic Dynamics of Bacteriorhodopsin from Two-Dimensional Electronic Photon Echo Spectroscopy and Multiconfigurational Quantum Chemistry

2020 ◽  
Vol 11 (10) ◽  
pp. 3889-3896
Author(s):  
Samer Gozem ◽  
Philip J. M. Johnson ◽  
Alexei Halpin ◽  
Hoi Ling Luk ◽  
Takefumi Morizumi ◽  
...  
Keyword(s):  
Excited State ◽  
Quantum Chemistry ◽  
Photon Echo ◽  
Two Dimensional

Spectroscopic investigations of a waveguide for photon-echo quantum memory

2010 ◽  
Vol 130 (9) ◽  
pp. 1586-1593 ◽  
Author(s):  
N. Sinclair ◽  
E. Saglamyurek ◽  
M. George ◽  
R. Ricken ◽  
C. La Mela ◽  
...  
Keyword(s):  
Photon Echo ◽  
Quantum Memory ◽  
Spectroscopic Investigations

Efficient multimode quantum memory based on photon echo in an optimal QED cavity

2010 ◽  
Vol 82 (2) ◽  
Author(s):  
Sergey A. Moiseev ◽  
Sergey N. Andrianov ◽  
Firdus F. Gubaidullin
Keyword(s):  
Photon Echo ◽  
Quantum Memory
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