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Roger209

Apparently, this user prefers to keep an air of mystery about them.

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  • Member for 6 years, 6 months
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  • Last seen Feb 15 at 23:22

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4 Derivation of the low-energy effective Hamiltonian [duplicate] Aug 15 '15
2 How do we find the canonical ensemble density matrix for two spins? Oct 3 '14
2 What's the closed-form of the sum relating to the DOS of simple harmonic motion? Jan 8 '15
1 A trace formula of two noncommutative operators Jun 26 '15
1 How to calculate the string order parameter (for Haldane phase) in density matrix renormalization group? May 26 '16
1 An Operator Identity relating to Trace [duplicate] Oct 2 '14
0 Derivative of the functional partition function relating to non-linear sigma model Apr 12 '17
0 How to understand the unitary? [closed] Oct 10 '14

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