Time-symmetric quantum mechanics questioned and defended

Physics Today ◽  
2011 ◽  
Vol 64 (5) ◽  
pp. 62-63 ◽  
Author(s):  
Yakir Aharonov ◽  
Sandu Popescu ◽  
Jeff Tollaksen
Keyword(s):  
Quantum Mechanics ◽  
Symmetric Quantum ◽  
Time Symmetric Quantum Mechanics

NONLOCAL MEASUREMENTS IN THE TIME-SYMMETRIC QUANTUM MECHANICS

2006 ◽  
Vol 20 (11n13) ◽  
pp. 1528-1535 ◽  
Author(s):  
LEV VAIDMAN ◽  
IZHAR NEVO
Keyword(s):  
Quantum Mechanics ◽  
Quantum Systems ◽  
Quantum Measurements ◽  
Quantum States ◽  
Standard Quantum ◽  
Time Direction ◽  
Quantum Formalism ◽  
Symmetric Quantum ◽  
Time Symmetric Quantum Mechanics

Although for some nonlocal variables the standard quantum measurements which are reliable, instantaneous, and nondemolition, are impossible, demolition reliable instantaneous measurements of all variables are possible. It is shown that this is correct also in the framework of the time-symmetric quantum formalism, i.e. nonlocal variables of composite quantum systems with quantum states evolving both forward and backward in time are measurable in a demolition way. The result follows from the possibility to reverse with certainty the time direction of backward evolving quantum states.

scholarly journals Remarks on the preservation of no-signaling principle in parity-time-symmetric quantum mechanics

2020 ◽  
Vol 35 (12) ◽  
pp. 2050090
Author(s):  
Bijan Bagchi ◽  
Suvendu Barik
Keyword(s):  
Quantum Mechanics ◽  
Density Matrix ◽  
The Other ◽  
Reduced Density Matrix ◽  
Entanglement Generation ◽  
Symmetric Quantum ◽  
No Signaling ◽  
Time Symmetric Quantum Mechanics ◽  
Reduced Density

Working within the framework of parity-time-symmetric quantum mechanics, we look into the possibility of entanglement generation and demonstrate that the feature of non-violation of no-signaling principle may hold for the simplest nontrivial case of bipartite systems. Basically, our arguments are based on the computation of the reduced density matrix of one party to justify that the entropy of the other does not change.

scholarly journals The Phase Space Formulation of Time-Symmetric Quantum Mechanics

Quanta ◽  
2015 ◽  
Vol 4 (1) ◽  
pp. 27 ◽  
Author(s):  
Charlyne De Gosson ◽  
Maurice A. De Gosson
Keyword(s):  
Quantum Mechanics ◽  
Phase Space ◽  
Symmetric Quantum ◽  
Space Formulation ◽  
Time Symmetric Quantum Mechanics
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