6,315 reputation
2043
bio website jfitzsimons.org
location Singapore, Singapore
age 33
visits member for 4 years, 5 months
seen Apr 19 at 14:32

I have just moved to the Center for Quantum Technologies in Singapore, after spending the last 3 years as a Merton College JRF in Theoretical Physics and a Senior Research Fellow in Oxford University Department of Materials. My research focuses largely on theoretical aspects of quantum information processing. In particular I am interested in spin networks, measurement based computation, cryptography and computational complexity.


Aug
27
answered Reversing gravitational decoherence
May
4
awarded  Talkative
May
4
awarded  Mortarboard
May
4
awarded  Enlightened
May
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awarded  Enlightened
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awarded  Enlightened
May
4
awarded  Nice Question
May
4
awarded  Nice Answer
May
4
awarded  Nice Answer
May
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awarded  Student
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awarded  Scholar
May
4
awarded  Good Question
May
4
awarded  Good Question
May
4
awarded  Nice Question
May
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awarded  Nice Question
May
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awarded  Nice Answer
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awarded  Nice Answer
May
1
comment What can the D-Wave quantum computer do?
@episanty: That is true of every problem in PSPACE. It might be that P=PSPACE, but we're pretty sure it's not true. But again, the only real evidence is that we can't prove equality.
Apr
18
comment Higgs mass and the hierarchy problem
I fixed your latex. You can include it yourself by enclosing it in dollar signs (like an inline equation in latex).
Apr
18
comment partial trace with sparse matrices
In general, a partial trace of a sparse matrix does not yield a sparse matrix, so you will get only limited improvement by using the fact that the matrix is sparse (maybe a factor of d/s).