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中国科学技术大学物理学院彭新华研究组和华中科技大学吕新友教授合作，在超辐射相变量子模拟的实验研究中取得重要进展。该合作研究组通过引入反压缩操作，借助于高精度的量子控制技术，首次成功地在核磁共振量子模拟器上实验实现了超越No-go定理的平衡态超辐射相变，推动了量子相变理论和量子模拟领域的发展，为量子精密测量提供了新的途径。相关研究成果于11月1日以“Experimental quantum simu...
Where did those electrons go? Decades-old mystery solved（图）
those electrons Decades-old mystery solved
2017/11/23
The concept of “valence” – the ability of a particular atom to combine with other atoms by exchanging electrons – is one of the cornerstones of modern chemistry and solid-state physics.Valence control...
Scientists have greatly expanded the range of functional temperatures for ferroelectrics, a key material used in a variety of everyday applications, by creating the first-ever polarization gradient in...
A One-Dimensional Local Tuning Algorithm for Solving GO Problems with Partially Defined Constraints
Global optimization multiextremal constraints geometric algorithms index scheme local tuning
2011/8/18
Abstract: Lipschitz one-dimensional constrained global optimization (GO) problems where both the objective function and constraints can be multiextremal and non-differentiable are considered in this p...
Concavity properties prevent the existence of significant landscapes in energy surfaces obtained by energy minimizations under constraints.
A No-Go Theorem for the Consistent Quantization of the Massive Gravitino on Robertson-Walker Spacetimes and Arbitrary Spin 3/2 Fields on General Curved Spacetimes
No-Go Theorem the Consistent Quantization the Massive Gravitino Robertson-Walker Spacetimes General Curved Spacetimes
2011/7/29
Abstract: We first introduce a set of conditions which assure that a free spin $\frac32$ field with $m\ge 0$ can be consistently ('unitarily') quantized on all curved spacetimes, i.e. also on spacetim...
No-Go theorem for energy surfaces
No-Go theorem energy surfaces Concavity property Nuclear Theory
2011/7/28
Abstract: Concavity properties prevent the existence of significant landscapes in energy surfaces obtained by energy minimizations under constraints. The contradiction holds at finite temperatures T a...
Making an opaque material transparent might seem like magic. But for well over a decade, physicists have been able to do just that in atomic gases using the phenomenon of electromagnetically induced t...
Trapped ions go for a quantum walk（图）
Trapped ions a quantum walk quantum computing quantum effects
2010/3/26
Physicists in Austria have demonstrated a "quantum walk" in detail for the first time, using trapped ions. Such experiments could allow us to better understand the transition between the quantum and c...
A No-Go Theorem for Nonlinear Canonical Quantization
no-go theorem canonical quantization nonlinear quantization
2007/8/15
2002Vol.37No.3pp.287-288DOI:
A No-Go Theorem for Nonlinear Canonical Quantization
Miroslav Engliğ
MÚ AV ČR, ŽITNÁ 25, 11567 Prague 1, Czech ...
A No-Go Theorem for Compatibility Between Involutions of First Order Differentials on a Lattice and Continuum
Limit
involution lattice differential antihomomorphism
continuum limit no-go theorem
2007/8/15
2003Vol.39No.3pp.301-303DOI:
A No-Go Theorem for Compatibility Between Involutions of First Order Differentials on a Lattice and Continuum
Limit
DAI Jian,1 SONG Xing-Chang,1 WU K...
Graph Properties and Circular Functions: How Low Can Quantum Query Complexity Go.
Graph Properties Circular Functions Quantum Query
2012/11/29
In decision tree models, considerable attention has been paid on the effect of symmetry on computational complexity.That is, for a permutation group Γ, how low can the complexity be for any boolean fu...