Simulating the Interplay of Particle Conservation and Long-Range Coherence.
Simulating the Interplay of Particle Conservation and Long-Range Coherence.
复制标题
模拟粒子守恒和长程相干性的相互作用。
DOI:
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复制
发表时间:
2022
影响因子:
8.6
通讯作者:
M. Reagor
中科院分区:
文献类型:
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作者:
Emanuele G. Dalla Torre;M. Reagor
Lasers and Bose-Einstein condensates (BECs) exhibit macroscopic quantum coherence in seemingly unrelated ways. Lasers possess a well-defined global phase while the number of photons fluctuates. In BECs of atoms, instead, the number of particles is conserved and the global phase is undefined. Here, we use gate-based quantum circuits to create a unified framework that connects lasers and BEC states. Our approach relies on a scalable circuit that measures the total number of particles without destroying long-range coherence. We introduce two complementary probes of global and relative phase coherence, study how they are affected by measurements of the particle number, and implement them on a superconducting quantum computer by Rigetti. We find that particle conservation enhances long-range phase coherence, highlighting a mechanism used by superfluids and superconductors to gain phase stiffness.
影响因子:
16.6
作者:
Damm T;Dung D;Vewinger F;Weitz M;Schmitt J
通讯作者:
Schmitt J
影响因子:
8.6
作者:
Klaers, Jan;Schmitt, Julian;Weitz, Martin
通讯作者:
Weitz, Martin
影响因子:
8.6
作者:
J. Schmitt;T. Damm;D. Dung;F. Vewinger;J. Klaers;M. Weitz
通讯作者:
J. Schmitt;T. Damm;D. Dung;F. Vewinger;J. Klaers;M. Weitz